CVE-2022-39321
No exploitation reported by the sources we read.
- Published2022-10-25
- Fixed in2.296.2 · 2.293.1 · 2.289.4 · 2.285.2 · 2.283.4
- WeaknessCWE-78
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
GitHub Actions Runner is the application that runs a job from a GitHub Actions workflow. The actions runner invokes the docker cli directly in order to run job containers, service containers, or container actions. A bug in the logic for how the environment is encoded into these docker commands was discovered in versions prior to 2.296.2, 2.293.1, 2.289.4, 2.285.2, and 2.283.4 that allows an input to escape the environment variable and modify that docker command invocation directly. Jobs that use container actions, job containers, or service containers alongside untrusted user inputs in environment variables may be vulnerable. The Actions Runner has been patched, both on `github.com` and hotfixes for GHES and GHAE customers in versions 2.296.2, 2.293.1, 2.289.4, 2.285.2, and 2.283.4. GHES and GHAE customers may want to patch their instance in order to have their runners automatically upgrade to these new runner versions. As a workaround, users may consider removing any container actions, job containers, or service containers from their jobs until they are able to upgrade their runner versions.
Timeline
dates in UTC- 2022-10-2517:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 18:48 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2022-39321?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2022-39321?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 2.x | ≥ 2.294.0, < 2.296.2 | 2.296.2 | NVD |
| 2.x | ≥ 2.290.0, < 2.293.1 | 2.293.1 | NVD |
| 2.x | ≥ 2.286.0, < 2.289.4 | 2.289.4 | NVD |
| 2.x | ≥ 2.284.0, < 2.285.2 | 2.285.2 | NVD |
| 2.283 | < 2.283.4 | 2.283.4 | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
- Update Github runner to 2.296.2 · 2.293.1 · 2.289.4 · 2.285.2 · 2.283.4
Advisories and patches
- github.comPatch · Release Notes
- github.comPatch
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Published
- 2022-10-25
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2022-39321?
Is CVE-2022-39321 actively exploited?
What is the CVSS score for CVE-2022-39321?
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