CVSS 3.1
8.2 highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:NCVE-2026-34042
High (8.2). EPSS 0.5% chance of exploitation in the next 30 days. Fixed in github.com/nektos/act 0.2.86.
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.
Severity
- EPSS
- 0.5% chance of exploitation in the next 30 days; higher than 40% of CVEs (scores of 2026-10-31)
- CWE
- CWE-862
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-x34h-54cw-9825 | Go | github.com/nektos/act | <0.2.86 | 0.2.86 |
| GO-2026-4890 | Go | github.com/nektos/act | <0.2.86 | 0.2.86 |