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CVE-2026-53583

6.5 Moyenne

Publiée le 20/08/2026 à 21:16 · Modifiée le 09/09/2026 à 23:19 · En attente d'analyse NVD · Source : security-advisories@github.com

Description

libgit2 is a portable C implementation of the Git core methods provided as a linkable library with a solid API, allowing to build Git functionality into your application. Prior to 1.8.6 and 1.9.5, verify_server_cert in src/libgit2/streams/openssl.c uses an inverted !!memcmp result in the GEN_IPADD branch when comparing an IP-literal host with a certificate IP SubjectAltName. OpenSSL builds reject matching IP addresses and accept mismatched IP addresses, allowing a network attacker with a CA-trusted certificate containing any IP SubjectAltName to intercept libgit2 connections to IP-literal HTTPS URLs. DNS SubjectAltName validation and non-OpenSSL TLS backends are not affected. This issue is fixed in versions 1.8.6 and 1.9.5.

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Produits concernés

Scores CVSS

VersionScoreSourceVecteur
3.1 6.5 Moyenne security-advisories@github.com CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Faiblesses (CWE)

Références

Ailleurs