CVE-2026-53583
MEDIUM
6,5
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: low
Integrity: low
Availability: none
Description
AI Translation Available
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.
295
Improper Certificate Validation
DraftCommon Consequences
Security Scopes Affected:
Integrity
Authentication
Potential Impacts:
Bypass Protection Mechanism
Gain Privileges Or Assume Identity
Applicable Platforms
Technologies:
Not Technology-Specific, Web Based, Mobile
297
Improper Validation of Certificate with Host Mismatch
IncompleteCommon Consequences
Security Scopes Affected:
Access Control
Authentication
Other
Potential Impacts:
Gain Privileges Or Assume Identity
Other
Applicable Platforms
Technologies:
Not Technology-Specific, Mobile, Web Based
https://github.com/libgit2/libgit2/security/advisories/GHSA-h7gc-w2gg-p9xp
https://github.com/libgit2/libgit2/commit/647dcb432980b84ede4cb5a008bbd1ccb4ead…
https://github.com/libgit2/libgit2/commit/c2aa35409ee0e6515df64da49750f13a0a42c…
https://github.com/libgit2/libgit2/commit/ef086bc3e4eedf62be38a910381aae24d4987…
https://github.com/libgit2/libgit2/releases/tag/v1.8.6
https://github.com/libgit2/libgit2/releases/tag/v1.9.5
https://github.com/libgit2/libgit2/security/advisories/GHSA-h7gc-w2gg-p9xp