CVE-2023-22726
act is a project which allows for local running of github actions.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.26%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
act is a project which allows for local running of github actions. The artifact server that stores artifacts from Github Action runs does not sanitize path inputs. This allows an attacker to download and overwrite arbitrary files on the host from a Github Action. This issue may lead to privilege escalation. The /upload endpoint is vulnerable to path traversal as filepath is user controlled, and ultimately flows into os.Mkdir and os.Open. The /artifact endpoint is vulnerable to path traversal as the path is variable is user controlled, and the specified file is ultimately returned by the server. This has been addressed in version 0.2.40. Users are advised to upgrade. Users unable to upgrade may, during implementation of Open and OpenAtEnd for FS, ensure to use ValidPath() to check against path traversal or clean the user-provided paths manually.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.26% probability · 69th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-434, CWE-22
- Affected
- act project/act
- Source
- security-advisories@github.com
EPSS 1.3% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/nektos/act/blob/master/pkg/artifacts/server.go#L65Third Party Advisory
- https://github.com/nektos/act/blob/v0.2.35/pkg/artifacts/server.go#L245Third Party Advisory
- https://github.com/nektos/act/blob/v0.2.35/pkg/artifacts/server.go#LL103C2-L103C2Third Party Advisory
- https://github.com/nektos/act/commit/63ae215071f94569d910964bdee866d91d6e3a10Patch, Third Party Advisory
- https://github.com/nektos/act/issues/1553Issue Tracking, Third Party Advisory
- https://github.com/nektos/act/security/advisories/GHSA-pc99-qmg4-rcffExploit, Third Party Advisory
- https://securitylab.github.com/advisories/GHSL-2023-004_act/Exploit, Third Party Advisory
- https://github.com/nektos/act/blob/master/pkg/artifacts/server.go#L65Third Party Advisory
- https://github.com/nektos/act/blob/v0.2.35/pkg/artifacts/server.go#L245Third Party Advisory
- https://github.com/nektos/act/blob/v0.2.35/pkg/artifacts/server.go#LL103C2-L103C2Third Party Advisory
- https://github.com/nektos/act/commit/63ae215071f94569d910964bdee866d91d6e3a10Patch, Third Party Advisory
- https://github.com/nektos/act/issues/1553Issue Tracking, Third Party Advisory
- https://github.com/nektos/act/security/advisories/GHSA-pc99-qmg4-rcffExploit, Third Party Advisory
- https://securitylab.github.com/advisories/GHSL-2023-004_act/Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.