Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
go-git (github.com/go-git/go-git/v5) versions before 5.16.5 do not properly verify integrity checksums for .pack and .idx files, so corrupted files may be consumed and cause errors such as "object not found". The source does not describe an attacker-driven exploit: the impact is data corruption, and the packfile checksum does not affect the client-server trust relationship. Upgrade to version 5.16.5 or later. If upgrading is not possible, run git fsck from the git command line to check repositories for corruption.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 4.3 | Medium | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0016, the 4th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:13 UTC First seen by agentprime
- 31 Oct 2026, 14:13 UTC Confirmed by OSV