{"cve":"CVE-2026-34041","nvd":{"published":"2026-03-31T03:15:58.053","modified":"2026-06-17T10:38:28.493","status":"Analyzed","description":"act is a project which allows for local running of github actions. Prior to version 0.2.86, act unconditionally processes the deprecated ::set-env:: and ::add-path:: workflow commands, which was disabled due to environment injection risks. When a workflow step echoes untrusted data to stdout, an attacker can inject these commands to set arbitrary environment variables or modify the PATH for all subsequent steps in the job. This issue has been patched in version 0.2.86.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":7.7},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-74"],"references":["https://github.com/nektos/act/commit/0c739c8e39c41aa5a07665f732da9cab6df0097a","https://github.com/nektos/act/releases/tag/v0.2.86","https://github.com/nektos/act/security/advisories/GHSA-xmgr-9pqc-h5vw"],"products":["nektos:act"],"source":"nvd","synced_at":"2026-10-19T22:28:18.033120106+00:00"},"epss":{"cve":"CVE-2026-34041","score":0.00643,"percentile":0.50827,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-xmgr-9pqc-h5vw","url":"https://osv.dev/vulnerability/GHSA-xmgr-9pqc-h5vw","summary":"act: Unrestricted set-env and add-path command processing enables environment injection","modified":"2026-04-02T21:26:04.645557701Z","packages":[{"ecosystem":"Go","name":"github.com/nektos/act","purl":"pkg:golang/github.com/nektos/act","ranges":["<0.2.86"],"fixed":["0.2.86"]}]},{"id":"GO-2026-4891","url":"https://osv.dev/vulnerability/GO-2026-4891","summary":"act: Unrestricted set-env and add-path command processing enables environment injection in github.com/nektos/act","modified":"2026-04-02T21:20:05.868931Z","packages":[{"ecosystem":"Go","name":"github.com/nektos/act","purl":"pkg:golang/github.com/nektos/act","ranges":["<0.2.86"],"fixed":["0.2.86"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}