CVE-2026-8286

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Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-8286
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-8286.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-8286
Aliases
Downstream
ALPINE (1)
AZL (2)
BELL (1)
CGA (21)
DEBIAN (1)
ECHO (1)
JLSEC (1)
MINI (2)
OESA (5)
openSUSE (2)
RHSA (6)
RLSA (2)
ROOT (8)
SUSE (8)
UBUNTU (1)
Related
ALSA (2)
openSUSE (2)
SUSE (8)
Published
2026-07-03T06:14:17Z
Modified
2026-09-30T08:16:23Z
Severity
  • 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
Summary
wrong STARTTLS connection reuse
Details

A vulnerability exists where a new transfer that uses STARTTLS to upgrade the connection might reuse an existing live connection even though the TLS configuration mismatches so it should not.

Database specific 
{
    "cna_assigner": "curl",
    "cwe_ids": [
        "CWE-295"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/8xxx/CVE-2026-8286.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "introduced": "7.30.0"
                },
                {
                    "fixed": "8.14.2"
                },
                {
                    "introduced": "8.15.0"
                },
                {
                    "fixed": "8.16.1"
                },
                {
                    "introduced": "8.17.0"
                },
                {
                    "fixed": "8.20.1"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ]
}
References

Affected packages

Git / github.com/curl/curl

Affected ranges

Type
GIT
Repo
https://github.com/curl/curl
Events
Introduced
a05f34973e6c4bb629d018f7cb51487be1c904d8
Fixed
68720b4837284335b2d63cb358f8f6ce65f5bc55
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "8.20.0"
        },
        {
            "last_affected": "8.20.0"
        },
        {
            "introduced": "8.19.0"
        },
        {
            "last_affected": "8.19.0"
        },
        {
            "introduced": "8.18.0"
        },
        {
            "last_affected": "8.18.0"
        },
        {
            "introduced": "8.17.0"
        },
        {
            "last_affected": "8.17.0"
        },
        {
            "introduced": "8.16.0"
        },
        {
            "last_affected": "8.16.0"
        },
        {
            "introduced": "8.15.0"
        },
        {
            "last_affected": "8.15.0"
        },
        {
            "introduced": "8.14.1"
        },
        {
            "last_affected": "8.14.1"
        },
        {
            "introduced": "8.14.0"
        },
        {
            "last_affected": "8.14.0"
        },
        {
            "introduced": "8.13.0"
        },
        {
            "last_affected": "8.13.0"
        },
        {
            "introduced": "8.12.1"
        },
        {
            "last_affected": "8.12.1"
        },
        {
            "introduced": "8.12.0"
        },
        {
            "last_affected": "8.12.0"
        },
        {
            "introduced": "8.11.1"
        },
        {
            "last_affected": "8.11.1"
        },
        {
            "introduced": "8.11.0"
        },
        {
            "last_affected": "8.11.0"
        },
        {
            "introduced": "8.10.1"
        },
        {
            "last_affected": "8.10.1"
        },
        {
            "introduced": "8.10.0"
        },
        {
            "last_affected": "8.10.0"
        },
        {
            "introduced": "8.9.1"
        },
        {
            "last_affected": "8.9.1"
        },
        {
            "introduced": "8.9.0"
        },
        {
            "last_affected": "8.9.0"
        },
        {
            "introduced": "8.8.0"
        },
        {
            "last_affected": "8.8.0"
        },
        {
            "introduced": "8.7.1"
        },
        {
            "last_affected": "8.7.1"
        },
        {
            "introduced": "8.7.0"
        },
        {
            "last_affected": "8.7.0"
        },
        {
            "introduced": "8.6.0"
        },
        {
            "last_affected": "8.6.0"
        },
        {
            "introduced": "8.5.0"
        },
        {
            "last_affected": "8.5.0"
        },
        {
            "introduced": "8.4.0"
        },
        {
            "last_affected": "8.4.0"
        },
        {
            "introduced": "8.3.0"
        },
        {
            "last_affected": "8.3.0"
        },
        {
            "introduced": "8.2.1"
        },
        {
            "last_affected": "8.2.1"
        },
        {
            "introduced": "8.2.0"
        },
        {
            "last_affected": "8.2.0"
        },
        {
            "introduced": "8.1.2"
        },
        {
            "last_affected": "8.1.2"
        },
        {
            "introduced": "8.1.1"
        },
        {
            "last_affected": "8.1.1"
        },
        {
            "introduced": "8.1.0"
        },
        {
            "last_affected": "8.1.0"
        },
        {
            "introduced": "8.0.1"
        },
        {
            "last_affected": "8.0.1"
        },
        {
            "introduced": "8.0.0"
        },
        {
            "last_affected": "8.0.0"
        },
        {
            "introduced": "7.88.1"
        },
        {
            "last_affected": "7.88.1"
        },
        {
            "introduced": "7.88.0"
        },
        {
            "last_affected": "7.88.0"
        },
        {
            "introduced": "7.87.0"
        },
        {
            "last_affected": "7.87.0"
        },
        {
            "introduced": "7.86.0"
        },
        {
            "last_affected": "7.86.0"
        },
        {
            "introduced": "7.85.0"
        },
        {
            "last_affected": "7.85.0"
        },
        {
            "introduced": "7.84.0"
        },
        {
            "last_affected": "7.84.0"
        },
        {
            "introduced": "7.83.1"
        },
        {
            "last_affected": "7.83.1"
        },
        {
            "introduced": "7.83.0"
        },
        {
            "last_affected": "7.83.0"
        },
        {
            "introduced": "7.82.0"
        },
        {
            "last_affected": "7.82.0"
        },
        {
            "introduced": "7.81.0"
        },
        {
            "last_affected": "7.81.0"
        },
        {
            "introduced": "7.80.0"
        },
        {
            "last_affected": "7.80.0"
        },
        {
            "introduced": "7.79.1"
        },
        {
            "last_affected": "7.79.1"
        },
        {
            "introduced": "7.79.0"
        },
        {
            "last_affected": "7.79.0"
        },
        {
            "introduced": "7.78.0"
        },
        {
            "last_affected": "7.78.0"
        },
        {
            "introduced": "7.77.0"
        },
        {
            "last_affected": "7.77.0"
        },
        {
            "introduced": "7.76.1"
        },
        {
            "last_affected": "7.76.1"
        },
        {
            "introduced": "7.76.0"
        },
        {
            "last_affected": "7.76.0"
        },
        {
            "introduced": "7.75.0"
        },
        {
            "last_affected": "7.75.0"
        },
        {
            "introduced": "7.74.0"
        },
        {
            "last_affected": "7.74.0"
        },
        {
            "introduced": "7.73.0"
        },
        {
            "last_affected": "7.73.0"
        },
        {
            "introduced": "7.72.0"
        },
        {
            "last_affected": "7.72.0"
        },
        {
            "introduced": "7.71.1"
        },
        {
            "last_affected": "7.71.1"
        },
        {
            "introduced": "7.71.0"
        },
        {
            "last_affected": "7.71.0"
        },
        {
            "introduced": "7.70.0"
        },
        {
            "last_affected": "7.70.0"
        },
        {
            "introduced": "7.69.1"
        },
        {
            "last_affected": "7.69.1"
        },
        {
            "introduced": "7.69.0"
        },
        {
            "last_affected": "7.69.0"
        },
        {
            "introduced": "7.68.0"
        },
        {
            "last_affected": "7.68.0"
        },
        {
            "introduced": "7.67.0"
        },
        {
            "last_affected": "7.67.0"
        },
        {
            "introduced": "7.66.0"
        },
        {
            "last_affected": "7.66.0"
        },
        {
            "introduced": "7.65.3"
        },
        {
            "last_affected": "7.65.3"
        },
        {
            "introduced": "7.65.2"
        },
        {
            "last_affected": "7.65.2"
        },
        {
            "introduced": "7.65.1"
        },
        {
            "last_affected": "7.65.1"
        },
        {
            "introduced": "7.65.0"
        },
        {
            "last_affected": "7.65.0"
        },
        {
            "introduced": "7.64.1"
        },
        {
            "last_affected": "7.64.1"
        },
        {
            "introduced": "7.64.0"
        },
        {
            "last_affected": "7.64.0"
        },
        {
            "introduced": "7.63.0"
        },
        {
            "last_affected": "7.63.0"
        },
        {
            "introduced": "7.62.0"
        },
        {
            "last_affected": "7.62.0"
        },
        {
            "introduced": "7.61.1"
        },
        {
            "last_affected": "7.61.1"
        },
        {
            "introduced": "7.61.0"
        },
        {
            "last_affected": "7.61.0"
        },
        {
            "introduced": "7.60.0"
        },
        {
            "last_affected": "7.60.0"
        },
        {
            "introduced": "7.59.0"
        },
        {
            "last_affected": "7.59.0"
        },
        {
            "introduced": "7.58.0"
        },
        {
            "last_affected": "7.58.0"
        },
        {
            "introduced": "7.57.0"
        },
        {
            "last_affected": "7.57.0"
        },
        {
            "introduced": "7.56.1"
        },
        {
            "last_affected": "7.56.1"
        },
        {
            "introduced": "7.56.0"
        },
        {
            "last_affected": "7.56.0"
        },
        {
            "introduced": "7.55.1"
        },
        {
            "last_affected": "7.55.1"
        },
        {
            "introduced": "7.55.0"
        },
        {
            "last_affected": "7.55.0"
        },
        {
            "introduced": "7.54.1"
        },
        {
            "last_affected": "7.54.1"
        },
        {
            "introduced": "7.54.0"
        },
        {
            "last_affected": "7.54.0"
        },
        {
            "introduced": "7.53.1"
        },
        {
            "last_affected": "7.53.1"
        },
        {
            "introduced": "7.53.0"
        },
        {
            "last_affected": "7.53.0"
        },
        {
            "introduced": "7.52.1"
        },
        {
            "last_affected": "7.52.1"
        },
        {
            "introduced": "7.52.0"
        },
        {
            "last_affected": "7.52.0"
        },
        {
            "introduced": "7.51.0"
        },
        {
            "last_affected": "7.51.0"
        },
        {
            "introduced": "7.50.3"
        },
        {
            "last_affected": "7.50.3"
        },
        {
            "introduced": "7.50.2"
        },
        {
            "last_affected": "7.50.2"
        },
        {
            "introduced": "7.50.1"
        },
        {
            "last_affected": "7.50.1"
        },
        {
            "introduced": "7.50.0"
        },
        {
            "last_affected": "7.50.0"
        },
        {
            "introduced": "7.49.1"
        },
        {
            "last_affected": "7.49.1"
        },
        {
            "introduced": "7.49.0"
        },
        {
            "last_affected": "7.49.0"
        },
        {
            "introduced": "7.48.0"
        },
        {
            "last_affected": "7.48.0"
        },
        {
            "introduced": "7.47.1"
        },
        {
            "last_affected": "7.47.1"
        },
        {
            "introduced": "7.47.0"
        },
        {
            "last_affected": "7.47.0"
        },
        {
            "introduced": "7.46.0"
        },
        {
            "last_affected": "7.46.0"
        },
        {
            "introduced": "7.45.0"
        },
        {
            "last_affected": "7.45.0"
        },
        {
            "introduced": "7.44.0"
        },
        {
            "last_affected": "7.44.0"
        },
        {
            "introduced": "7.43.0"
        },
        {
            "last_affected": "7.43.0"
        },
        {
            "introduced": "7.42.1"
        },
        {
            "last_affected": "7.42.1"
        },
        {
            "introduced": "7.42.0"
        },
        {
            "last_affected": "7.42.0"
        },
        {
            "introduced": "7.41.0"
        },
        {
            "last_affected": "7.41.0"
        },
        {
            "introduced": "7.40.0"
        },
        {
            "last_affected": "7.40.0"
        },
        {
            "introduced": "7.39.0"
        },
        {
            "last_affected": "7.39.0"
        },
        {
            "introduced": "7.38.0"
        },
        {
            "last_affected": "7.38.0"
        },
        {
            "introduced": "7.37.1"
        },
        {
            "last_affected": "7.37.1"
        },
        {
            "introduced": "7.37.0"
        },
        {
            "last_affected": "7.37.0"
        },
        {
            "introduced": "7.36.0"
        },
        {
            "last_affected": "7.36.0"
        },
        {
            "introduced": "7.35.0"
        },
        {
            "last_affected": "7.35.0"
        },
        {
            "introduced": "7.34.0"
        },
        {
            "last_affected": "7.34.0"
        },
        {
            "introduced": "7.33.0"
        },
        {
            "last_affected": "7.33.0"
        },
        {
            "introduced": "7.32.0"
        },
        {
            "last_affected": "7.32.0"
        },
        {
            "introduced": "7.31.0"
        },
        {
            "last_affected": "7.31.0"
        },
        {
            "introduced": "7.30.0"
        },
        {
            "last_affected": "7.30.0"
        },
        {
            "fixed": "8.21.0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ]
}
Type
GIT
Repo
https://github.com/curl/curl.git
Events
Introduced
a1701eea289fe7ea80651f801cf992838a491dde
Fixed
a86efdd7ca5433de9231e650f18247de8319ad16

Affected versions

7.*
7.30.0
7.31.0
7.32.0
7.33.0
7.34.0
7.35.0
7.36.0
7.37.0
7.37.1
7.38.0
7.39.0
7.40.0
7.41.0
7.42.0
7.42.1
7.43.0
7.44.0
7.45.0
7.46.0
7.47.0
7.47.1
7.48.0
7.49.0
7.49.1
7.50.0
7.50.1
7.50.2
7.50.3
7.51.0
7.52.0
7.52.1
7.53.0
7.53.1
7.54.0
7.54.1
7.55.0
7.55.1
7.56.0
7.56.1
7.57.0
7.58.0
7.59.0
7.60.0
7.61.0
7.61.1
7.62.0
7.63.0
7.64.0
7.64.1
7.65.0
7.65.1
7.65.2
7.65.3
7.66.0
7.67.0
7.68.0
7.69.0
7.69.1
7.70.0
7.71.0
7.71.1
7.72.0
7.73.0
7.74.0
7.75.0
7.76.0
7.76.1
7.77.0
7.78.0
7.79.0
7.79.1
7.80.0
7.81.0
7.82.0
7.83.0
7.83.1
7.84.0
7.85.0
7.86.0
7.87.0
7.88.0
7.88.1
8.*
8.0.0
8.0.1
8.1.0
8.1.1
8.1.2
8.10.0
8.10.1
8.11.0
8.11.1
8.12.0
8.12.1
8.13.0
8.14.0
8.14.1
8.15.0
8.16.0
8.17.0
8.18.0
8.19.0
8.2.0
8.2.1
8.20.0
8.3.0
8.4.0
8.5.0
8.6.0
8.7.0
8.7.1
8.8.0
8.9.0
8.9.1
Other
curl-7_30_0
curl-7_31_0
curl-7_32_0
curl-7_33_0
curl-7_34_0
curl-7_35_0
curl-7_36_0
curl-7_37_0
curl-7_37_1
curl-7_38_0
curl-7_39_0
curl-7_40_0
curl-7_41_0
curl-7_42_0
curl-7_43_0
curl-7_44_0
curl-7_45_0
curl-7_46_0
curl-7_47_0
curl-7_47_1
curl-7_48_0
curl-7_49_0
curl-7_49_1
curl-7_50_0
curl-7_50_1
curl-7_50_2
curl-7_50_3
curl-7_51_0
curl-7_52_0
curl-7_52_1
curl-7_53_0
curl-7_53_1
curl-7_54_0
curl-7_54_1
curl-7_55_0
curl-7_55_1
curl-7_56_0
curl-7_56_1
curl-7_57_0
curl-7_58_0
curl-7_59_0
curl-7_60_0
curl-7_61_0
curl-7_61_1
curl-7_62_0
curl-7_63_0
curl-7_64_0
curl-7_64_1
curl-7_65_0
curl-7_65_1
curl-7_65_2
curl-7_65_3
curl-7_66_0
curl-7_67_0
curl-7_68_0
curl-7_69_0
curl-7_69_1
curl-7_70_0
curl-7_71_0
curl-7_71_1
curl-7_72_0
curl-7_73_0
curl-7_74_0
curl-7_75_0
curl-7_76_0
curl-7_76_1
curl-7_77_0
curl-7_78_0
curl-7_79_0
curl-7_79_1
curl-7_80_0
curl-7_81_0
curl-7_82_0
curl-7_83_0
curl-7_83_1
curl-7_84_0
curl-7_85_0
curl-7_86_0
curl-7_87_0
curl-7_88_0
curl-7_88_1
curl-8_0_0
curl-8_0_1
curl-8_10_0
curl-8_10_1
curl-8_11_0
curl-8_11_1
curl-8_12_0
curl-8_12_1
curl-8_13_0
curl-8_14_0
curl-8_14_1
curl-8_15_0
curl-8_16_0
curl-8_17_0
curl-8_18_0
curl-8_19_0
curl-8_1_0
curl-8_1_1
curl-8_1_2
curl-8_20_0
curl-8_2_0
curl-8_2_1
curl-8_3_0
curl-8_4_0
curl-8_5_0
curl-8_6_0
curl-8_7_0
curl-8_7_1
curl-8_8_0
curl-8_9_0
curl-8_9_1
rc-8_18_0-1
rc-8_18_0-2
rc-8_18_0-3
rc-8_19_0-1
rc-8_19_0-2
rc-8_19_0-3
rc-8_20_0-1
rc-8_20_0-2
rc-8_20_0-3
rc-8_21_0-1
rc-8_21_0-2
rc-8_21_0-3

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-8286.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "function_hash": "255927142008379728411564186004947874680",
            "length": 1266
        },
        "id": "CVE-2026-8286-36e2c702",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/curl/curl.git/commit/a86efdd7ca5433de9231e650f18247de8319ad16",
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            "function": "url_attach_existing"
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            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-8286-77b46469",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/curl/curl.git/commit/a86efdd7ca5433de9231e650f18247de8319ad16",
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    {
        "deprecated": false,
        "digest": {
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            "length": 443
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        "id": "CVE-2026-8286-916399bb",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/curl/curl.git/commit/a86efdd7ca5433de9231e650f18247de8319ad16",
        "target": {
            "file": "lib/url.c",
            "function": "url_match_ssl_use"
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    {
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        "digest": {
            "function_hash": "245058740434124744257493381128513890250",
            "length": 358
        },
        "id": "CVE-2026-8286-f34f0cee",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/curl/curl.git/commit/a86efdd7ca5433de9231e650f18247de8319ad16",
        "target": {
            "file": "lib/url.c",
            "function": "url_match_ssl_config"
        }
    }
]
vanir_signatures_modified 
"2026-09-30T08:16:23Z"