CVE-2026-18924

A flaw in libcurl's handling of HTTP/2 Server Push streams, when the parent handle is set to share connections with other handles, can lead to use-after-free in the cleanup process.

Database specific

{
    "cna_assigner":  "curl",
    "cwe_ids":  [
        "CWE-416"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/18xxx/CVE-2026-18924.json"
}

References

Affected packages

Git / github.com/curl/curl

Affected ranges

Type

GIT

Repo

https://github.com/curl/curl

Events

Introduced

1a7f66a3de2625d10f65415e6eb3e56067dc0555

Fixed

01346829096c61b372692f6dc43ffa778c6caccd

Database specific

Show details

{
    "extracted_events":  [
        {
            "cpe":  "cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*",
            "range":  [
                {
                    "introduced":  "7.44.0"
                },
                {
                    "fixed":  "8.22.0"
                }
            ],
            "source":  "CPE_RANGE"
        }
    ]
}

Type

GIT

Repo

https://github.com/curl/curl.git

Events

Introduced

ea7134ac874a66107e54ff93657ac565cf2ec4aa

Fixed

90325ff0444cbdff368bda5d26d6405a0bb6ee43

Database specific

Show details

{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "ea7134ac874a66107e54ff93657ac565cf2ec4aa"
                },
                {
                    "fixed":  "90325ff0444cbdff368bda5d26d6405a0bb6ee43"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandardRange"
        }
    ]
}

Affected versions

7.*

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

8.21.0

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_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_21_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

rc-8_22_0-1

rc-8_22_0-2

rc-8_22_0-3

Database specific

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-18924.json"

vanir_signatures

[
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "104737204212963007849146280247901217683",
                "32710492097545712922069563914420781218",
                "326860830892891747954722705830409690615",
                "28803319342779406078039340070302970203",
                "269074417755289333101880056095755366764",
                "20948299274049332955590773845710988414",
                "239244096456005701495860979909027141960",
                "278620102738167799225657896424856535537"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-18924-006216c6",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/curl/curl.git/commit/90325ff0444cbdff368bda5d26d6405a0bb6ee43",
        "target":  {
            "file":  "lib/http2.c"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "317614319041428408157048689014659946723",
            "length":  245
        },
        "id":  "CVE-2026-18924-5226cef7",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/curl/curl.git/commit/90325ff0444cbdff368bda5d26d6405a0bb6ee43",
        "target":  {
            "file":  "lib/http2.c",
            "function":  "h2_duphandle"
        }
    }
]

vanir_signatures_modified

"2026-10-15T07:23:31Z"