CVE-2026-29049: `melange update-cache` has unbounded HTTP download that can exhaust disk in CI
(updated )
melange update-cache downloads URIs from build configs via io.Copy without any size limit or HTTP client timeout (pkg/renovate/cache/cache.go). An attacker-controlled URI in a melange config can cause unbounded disk writes, exhausting disk on the build runner. Affected versions <= 0.40.5.
Fix: Merged Acknowledgements
Thank you to Oleh Konko from 1seal for discovering and reporting this issue.
References
- github.com/advisories/GHSA-7rp8-r62p-q6wc
- github.com/chainguard-dev/melange/commit/652ca5af08588f78e2d405e64b058fac8398d23f
- github.com/chainguard-dev/melange/pull/2379
- github.com/chainguard-dev/melange/releases/tag/v0.43.4
- github.com/chainguard-dev/melange/security/advisories/GHSA-7rp8-r62p-q6wc
- nvd.nist.gov/vuln/detail/CVE-2026-29049
Code Behaviors & Features
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