melange allows users to build apk packages using declarative pipelines. Starting in version 0.23.0 and prior to version 0.29.5, SBOM files generated by melange in apks had file system permissions mode 666. This potentially allows an unprivileged user to tamper with apk SBOMs on a running image, potentially confusing security scanners. An attacker could also perform a DoS under special circumstances. Version 0.29.5 fixes the issue.
https://github.com/chainguard-dev/melange/security/advisories/GHSA-5662-cv6m-63wh
https://github.com/chainguard-dev/melange/releases/tag/v0.29.5
https://github.com/chainguard-dev/melange/releases/tag/v0.23.0
https://github.com/chainguard-dev/melange/pull/2086
https://github.com/chainguard-dev/melange/pull/1836
https://github.com/chainguard-dev/melange/commit/e29494b4a40a91619ec1c87a09003c6d5164cea1
https://github.com/chainguard-dev/melange/commit/1b272db2a0bb3441553284cc56d87236b4b64c04