NULL Pointer Dereference Affecting github.com/moby/buildkit/source/git package, versions >=0.26.0 <0.34.2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMMOBYBUILDKITSOURCEGIT-22480407
- published12 Nov 2026
- disclosed3 Nov 2026
- creditUnknown
Introduced: 3 Nov 2026
NewCVE-2026-121522 Â (opens in a new tab)How to fix?
Upgrade github.com/moby/buildkit/source/git to version 0.34.2 or higher.
Overview
Affected versions of this package are vulnerable to NULL Pointer Dereference via the resolveMetadata function in the Git source resolver. An attacker can crash buildkitd by supplying a build definition that resolves metadata for the same Git reference repeatedly: a failed or non-cacheable resolution stores a typed-nil *Metadata in the shared resolver cache, and a later resolution dereferences it. The cache is shared across jobs on a solve state, so one build can also cause another build to crash.
Workarounds
- Avoid untrusted build definitions to prevent triggering the Git source resolver condition that can crash the daemon.