CVSS 3.1
8.4 highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:HCVE-2026-24843
High (8.4) in chainguard melange. EPSS 0.2% chance of exploitation in the next 30 days. Fixed in chainguard.dev/melange 0.40.3.
melange allows users to build apk packages using declarative pipelines. In version 0.11.3 to before 0.40.3, an attacker who can influence the tar stream from a QEMU guest VM could write files outside the intended workspace directory on the host. The retrieveWorkspace function extracts tar entries without validating that paths stay within the workspace, allowing path traversal via ../ sequences. This issue has been patched in version 0.40.3.
Severity
- EPSS
- 0.2% chance of exploitation in the next 30 days; higher than 8% of CVEs (scores of 2026-10-31)
- CWE
- CWE-22
- Published
- Modified
- Record from
- the NVD, synced
Affected
- chainguard:melange
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-qxx2-7h4c-83f4 | Go | chainguard.dev/melange | >=0.11.3 <0.40.3 | 0.40.3 |
| GO-2026-4407 | Go | chainguard.dev/melange | >=0.11.3 <0.40.3 | 0.40.3 |