CURL-CVE-2026-80229

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Source
https://curl.se/docs/CVE-2026-80229.html
Import Source
https://curl.se/docs/CURL-CVE-2026-80229.json
JSON Data
https://api.osv.dev/v1/vulns/CURL-CVE-2026-80229
Aliases
Published
2026-09-02T08:00:00Z
Modified
2026-09-07T14:06:38Z
Summary
OpenSSL provider use-after-free
Details

When performing transfers via libcurl’s multi interface, pooled TLS connections can outlive their originating easy handles. In OpenSSL 3 provider configurations, libcurl attaches an allocated library context to the easy handle's state and passes it to OpenSSL without acquiring an ownership reference; destroying the easy handle prematurely frees this context while the active connection retains a dangling pointer, leading to a heap-use-after-free upon subsequent I/O or post-handshake operations.

Database specific 
{
    "CWE": {
        "desc": "Use After Free",
        "id": "CWE-416"
    },
    "URL": "https://curl.se/docs/CVE-2026-80229.json",
    "affects": "both",
    "issue": "https://hackerone.com/reports/3969255",
    "last_affected": "8.21.0",
    "package": "curl",
    "severity": "Low",
    "www": "https://curl.se/docs/CVE-2026-80229.html"
}
Credits
    • Stanislav Fort (Aisle Research) - FINDER
    • Daniel Stenberg - REMEDIATION_DEVELOPER

Affected packages

Git / github.com/curl/curl.git

Affected ranges

Type
SEMVER
Events
Introduced
8.14.0
Fixed
8.22.0
Type
SEMVER
Events
Introduced
8.14.0
Fixed
8.20.1
Type
SEMVER
Events
Introduced
8.14.0
Fixed
8.16.1
Type
SEMVER
Events
Introduced
8.14.0
Fixed
8.14.2
Type
GIT
Repo
https://github.com/curl/curl.git
Events
Introduced
f2ce6c46b9dcc46ced0ce43fa95176ea7599a854
Fixed
7ea37abc6ac0120ba5f6d94be8d196f7cf1506bb

Affected versions

8.*
8.14.0
8.14.1
8.15.0
8.16.0
8.17.0
8.18.0
8.19.0
8.20.0
8.21.0
Other
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_20_0
curl-8_21_0
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

Database specific

source 
"https://curl.se/docs/CURL-CVE-2026-80229.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "286481243370392075526062118659509114348",
                "196216237767420629426097604457509099271",
                "68125101134514249852390309734181512406",
                "31227070220736528463295638619520929314"
            ],
            "threshold": 0.9
        },
        "id": "CURL-CVE-2026-80229-49021c9f",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/curl/curl.git/commit/7ea37abc6ac0120ba5f6d94be8d196f7cf1506bb",
        "target": {
            "file": "lib/vtls/openssl.c"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "93812128733312520413839406253910216274",
            "length": 4945
        },
        "id": "CURL-CVE-2026-80229-74875d56",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/curl/curl.git/commit/7ea37abc6ac0120ba5f6d94be8d196f7cf1506bb",
        "target": {
            "file": "lib/vtls/openssl.c",
            "function": "Curl_ossl_ctx_init"
        }
    }
]
vanir_signatures_modified 
"2026-09-07T14:06:38Z"