CVE-2026-61712
BuildKit: Possible runtime DoS via unbounded group parsing
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Prior to 0.31.1, BuildKit read attacker-controlled /etc/passwd and /etc/group files without an upper bound while resolving a username to a user identifier or group identifier in executor/oci/user.go and solver/llbsolver/ops/user_linux.go. A malicious base image or build could provide oversized files that exhausted memory during user resolution and caused out-of-memory termination of the buildkitd process. This issue is fixed in version 0.31.1.
| CWE | CWE-770 |
| Vendor | moby |
| Product | buildkit |
| Published | Aug 19, 2026 |
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Affected Versions
moby / buildkit
< 0.31.1
References
github.com: https://github.com/moby/buildkit/security/advisories/GHSA-72x6-4j93-7w86 github.com: https://github.com/moby/buildkit/commit/408266e4ba254cecabedaacdad6905de4d2a75a1 github.com: https://github.com/moby/buildkit/commit/69a3924648e485acb3faad3081e03a8554431255 github.com: https://github.com/moby/buildkit/releases/tag/v0.31.1