act: actions/cache server allows malicious cache injection_CVE-2026-34042

8.2 / 10

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N

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.

Basic Information

ID CVE-2026-34042

Source GitHub_M

Published Mar 31, 2026 at 01:46

Modified Mar 31, 2026 at 18:53

Affected Product

Vendor nektos

Product act

Version < 0.2.86

Affected Versions nektos act < 0.2.86

CWE Classification

CWE-862

References

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    "published": "2026-03-31T01:46:15.747Z",
    "modified": "2026-03-31T18:53:13.564Z",
    "type": "cve",
    "title": "act: actions/cache server allows malicious cache injection",
    "source": "GitHub_M",
    "references": "https://github.com/nektos/act/security/advisories/GHSA-x34h-54cw-9825\nhttps://github.com/nektos/act/commit/c28c27e141e8b54f9853de82f421ee09846751f7\nhttps://code.forgejo.org/forgejo/runner/issues/294\nhttps://github.com/nektos/act/releases/tag/v0.2.86",
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