UBUNTU-CVE-2026-100407
Dashboard / Vulnerabilities / UBUNTU-CVE-2026-100407
Summary:
Details: Git for Windows is the Windows port of Git. From 2.44.0.windows.1 until 2.55.0.windows.3, the git-credential-wincred store operation in contrib/credential/wincred/git-credential-wincred.c uses _scwprintf() to size a formatted wide-character credential buffer without space for the terminating NUL when both password and oauth_refresh_token are present. The operation also passes a byte count to _snwprintf_s() where a wide-character count is required, allowing the terminator to be written one WCHAR past the heap allocation before CredWriteW() persists the credential. The resulting fixed two-byte NUL overwrite can terminate the helper with Windows heap-corruption status and can cause git credential approve to report success even though the OAuth credential was not stored. This issue is fixed in version 2.55.0.windows.3.
References: https://ubuntu.com/security/CVE-2026-100407, https://www.cve.org/CVERecord?id=CVE-2026-100407
Affected packages
Package
Name: git
Purl: pkg:deb/ubuntu/git?arch=source&distro=esm-infra%2Fxenial
Affected ranges
Type: ECOSYSTEM
Events:
