CVE-2026-4873
- Source
- https://cve.org/CVERecord?id=CVE-2026-4873
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-4873.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2026-4873
- Aliases
- Downstream
ALPINE (1)
BELL (1)
CGA (1)
DEBIAN (1)
ECHO (1)
JLSEC (1)
openSUSE (2)
RHSA (1)
ROOT (3)
SUSE (7)
UBUNTU (1)
- Related
- Published
- 2026-05-13T08:27:04Z
- Modified
- 2026-09-30T08:09:03Z
- Severity
-
- 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
- Summary
- connection reuse ignores TLS requirement
- Details
-
A vulnerability exists where a connection requiring TLS incorrectly reuses an existing unencrypted connection from the same connection pool. If an initial transfer is made in clear-text (via IMAP, SMTP, or POP3), a subsequent request to that same host bypasses the TLS requirement and instead transmit data unencrypted.
- Database specific
{ "cna_assigner": "curl", "cwe_ids": [ "CWE-319" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4873.json", "unresolved_ranges": [ { "extracted_events": [ { "introduced": "7.20.0" }, { "fixed": "8.14.2" }, { "introduced": "8.15.0" }, { "fixed": "8.16.1" } ], "source": "AFFECTED_FIELD" } ] }- References
-
- http://www.openwall.com/lists/oss-security/2026/04/29/7
- https://curl.se/docs/CVE-2026-4873.html
- https://curl.se/docs/CVE-2026-4873.json
- https://hackerone.com/reports/3621851
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4873.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-4873
- https://github.com/curl/curl.git
Affected packages
Git / github.com/curl/curl
Affected ranges
Affected versions
7.*
7.20.0
7.20.1
7.21.0
7.21.1
7.21.2
7.21.3
7.21.4
7.21.5
7.21.6
7.21.7
7.22.0
7.23.0
7.23.1
7.24.0
7.25.0
7.26.0
7.27.0
7.28.0
7.28.1
7.29.0
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
8.18.0
8.19.0
8.2.0
8.2.1
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_20_0
curl-7_20_1
curl-7_21_0
curl-7_21_1
curl-7_21_2
curl-7_21_3
curl-7_21_4
curl-7_21_5
curl-7_21_6
curl-7_21_7
curl-7_22_0
curl-7_23_0
curl-7_23_1
curl-7_25_0
curl-7_26_0
curl-7_27_0
curl-7_28_0
curl-7_28_1
curl-7_29_0
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_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
Database specific
source
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-4873.json"
vanir_signatures
[
{
"deprecated": false,
"digest": {
"function_hash": "169885633457962860362958220457320236532",
"length": 399
},
"id": "CVE-2026-4873-432df36b",
"signature_type": "Function",
"signature_version": "v1",
"source": "https://github.com/curl/curl.git/commit/507e7be573b0a76fca597b75ff7cb27a66e7d865",
"target": {
"file": "lib/url.c",
"function": "url_match_ssl_use"
}
},
{
"deprecated": false,
"digest": {
"line_hashes": [
"186702639195371621663220614719413669739",
"98146386134768362884346766368977077720",
"144008511706963310545008089099783743644",
"214623997824184722186061516736204732779",
"124575361568450278741812246576167336919",
"105135349804760838859480469610730392589",
"193100289411074928523858916880171338604",
"6936524333846488920218514747282650233",
"276618269211397366230394600852763568259",
"229942947754903715914943302740058426565",
"288248169414681199400959167724664616055"
],
"threshold": 0.9
},
"id": "CVE-2026-4873-731b3328",
"signature_type": "Line",
"signature_version": "v1",
"source": "https://github.com/curl/curl.git/commit/507e7be573b0a76fca597b75ff7cb27a66e7d865",
"target": {
"file": "lib/url.c"
}
},
{
"deprecated": false,
"digest": {
"function_hash": "141979231375931355570407370477556625049",
"length": 1203
},
"id": "CVE-2026-4873-9a7ca877",
"signature_type": "Function",
"signature_version": "v1",
"source": "https://github.com/curl/curl.git/commit/507e7be573b0a76fca597b75ff7cb27a66e7d865",
"target": {
"file": "lib/url.c",
"function": "url_attach_existing"
}
}
]
vanir_signatures_modified
"2026-09-30T08:09:03Z"