CVE-2026-34042
Description
act is a project which allows for local running of github actions. Prior to version 0.2.86, act's built in actions/cache server listens to connections on all interfaces and allows anyone who can connect to it including someone anywhere on the internet to create caches with arbitrary keys and retrieve all existing caches. If they can predict which cache keys will be used by local actions, they can create malicious caches containing whatever files they please most likely allowing arbitrary remote code execution within the docker container. This issue has been patched in version 0.2.86.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/nektos/actGo | < 0.2.86 | 0.2.86 |
Affected products
3- ghsa-coords2 versions
< 0.2.86+ 1 more
- (no CPE)range: < 0.2.86
- (no CPE)range: < 0.0.20260402T184258-150000.1.158.1
Patches
Vulnerability mechanics
References
6- github.com/advisories/GHSA-x34h-54cw-9825ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-34042ghsaADVISORY
- code.forgejo.org/forgejo/runner/issues/294nvdWEB
- github.com/nektos/act/commit/c28c27e141e8b54f9853de82f421ee09846751f7nvdWEB
- github.com/nektos/act/releases/tag/v0.2.86nvdWEB
- github.com/nektos/act/security/advisories/GHSA-x34h-54cw-9825nvdWEB
News mentions
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