Update module github.com/go-git/go-git/v5 to v5.19.0 [SECURITY] (release-v0.6)#3293
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This PR contains the following updates:
v5.18.0→v5.19.0go-git: Credential leak via cross-host redirect in smart HTTP transport
CVE-2026-41506 / GHSA-3xc5-wrhm-f963
More information
Details
Impact
go-gitmay leak HTTP authentication credentials when following redirects during smart-HTTP clone and fetch operations.If a remote repository responds to the initial
/info/refsrequest with a redirect to a different host, go-git updates the session endpoint to the redirected location and reuses the original authentication for subsequent requests. This can result in the credentials (e.g. Authorization headers) being sent to an unintended host.An attacker controlling or influencing the redirect target can capture these credentials and potentially reuse them to access the victim’s repositories or other resources, depending on the scope of the credential.
Clients using
go-gitexclusively with trusted remotes (for example, GitHub or GitLab), and over a secure HTTPS connection, are not affected by this issue. The risk arises when interacting with untrusted or misconfigured Git servers, or when using unsecured HTTP connections, which is not recommended. Such configurations also expose clients to a broader class of security risks beyond this issue, including credential interception and tampering of repository data.Patches
Users should upgrade to
v5.18.0, orv6.0.0-alpha.2, in order to mitigate this vulnerability. Versions prior to v5 are likely to be affected, users are recommended to upgrade to a supportedgo-gitversion.The patched versions add support for configuring followRedirects. In line with upstream behaviour, the default is now
initial, while users can opt intoFollowRedirectsorNoFollowRedirectsprogrammatically.Credit
Thanks to the 3 separate reports from @celinke97, @N0zoM1z0 and @AyushParkara. Thanks for finding and reporting this issue privately to the
go-gitproject. 🙇Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:NReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
go-git's improper parsing of specially crafted objects may lead to inconsistent interpretation compared to upstream Git
CVE-2026-45022 / GHSA-389r-gv7p-r3rp
More information
Details
Impact
go-gitmay parse malformed Git objects in a way that differs from upstream Git. Whencommitortagobjects contain ambiguous or malformed headers,go-git’s decoded representation may expose values differently from how Git itself would interpret or reject the same object.Additionally,
go-git’s commit signing and verification logic operates over commit data reconstructed fromgo-git’s parsed representation rather than the original raw object bytes. As a result,go-gitmay sign or verify a commit payload that is not byte-for-byte equivalent to the object stored in the repository.This can cause a signature to appear valid for a commit whose displayed or effective metadata differs from the object that was intended to be signed.
Patches
Users should upgrade to a patched version in order to mitigate this vulnerability. Versions prior to v5 are likely to be affected, users are recommended to upgrade to a supported
go-gitversion.Credit
Thanks to @bugbunny-research (https://bugbunny.ai/) for reporting this to
sigstore/gitsign, and to @wlynch, @patzielinski and @adityasaky for coordinating the disclosure with thego-gitproject. 🙇 🥇Thanks to @wayphinder for reporting this to the
go-gitproject. 🙇Severity
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:NReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
Release Notes
go-git/go-git (github.com/go-git/go-git/v5)
v5.19.0Compare Source
What's Changed
Full Changelog: go-git/go-git@v5.18.0...v5.19.0
Configuration
📅 Schedule: (UTC)
🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.
♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.
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