PT-2026-29156 · Go · Github.Com/Go-Git/Go-Git/V5

Published

2026-03-30

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Updated

2026-03-30

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CVE-2026-33762

CVSS v3.1

2.8

Low

AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L

Impact

go-git’s index decoder for format version 4 fails to validate the path name prefix length before applying it to the previously decoded path name. A maliciously crafted index file can trigger an out-of-bounds slice operation, resulting in a runtime panic during normal index parsing.
This issue only affects Git index format version 4. Earlier formats (go-git supports only v2 and v3) are not vulnerable to this issue.
An attacker able to supply a crafted .git/index file can cause applications using go-git to panic while reading the index. If the application does not recover from panics, this results in process termination, leading to a denial-of-service (DoS) condition.
Exploitation requires the ability to modify or inject a Git index file within the local repository in disk. This typically implies write access to the .git directory.

Patches

Users should upgrade to v5.17.1, or the latest v6 pseudo-version, in order to mitigate this vulnerability.

Credit

go-git maintainers thank @kq5y for finding and reporting this issue privately to the go-git project.

Fix

Improper Validation of Array Index

Weakness Enumeration

CWE-129

Related Identifiers

CVE-2026-33762
GHSA-GM2X-2G9H-CCM8

Affected Products

Github.Com/Go-Git/Go-Git/V5