{"id":"GHSA-5662-cv6m-63wh","summary":"melange's world-writable permissions expose SBOM files to potential image tampering","details":"It was discovered that the SBOM files generated by melange in apks had file system permissions mode 666:\n```\n$ apkrane ls https://packages.wolfi.dev/os/x86_64/APKINDEX.tar.gz -P hello-wolfi --full --latest  | xargs wget -q -O  - | tar tzv 2\u003e/dev/null var/lib/db/sbom\ndrwxr-xr-x root/root         0 2025-06-23 14:17 var/lib/db/sbom\n-rw-rw-rw- root/root      3383 2025-06-23 14:17 var/lib/db/sbom/hello-wolfi-2.12.2-r1.spdx.json\n```\n\nThis issue was introduced in commit 1b272db (\"Persist workspace filesystem throughout package builds (#1836)\") ([v0.23.0](https://github.com/chainguard-dev/melange/releases/tag/v0.23.0)).\n\n### Impact\nThis 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.\n\n### Patches\nThis issue was addressed in melange in e29494b (\"fix: tighten up permissions for written SBOM files and signature tarballs (#2086)\") ([v0.29.5](https://github.com/chainguard-dev/melange/releases/tag/v0.29.5)).\n\n## Acknowledgements\n\nThanks to Cody Harris [H2O.ai](https://h2o.ai/) and Markus Boehme for independently reporting this issue.","aliases":["CVE-2025-54059","GO-2025-3815"],"modified":"2026-02-04T03:07:01.829033Z","published":"2025-07-18T20:13:21Z","related":["CGA-jjfv-8pqp-q3gc"],"database_specific":{"github_reviewed_at":"2025-07-18T20:13:21Z","cwe_ids":["CWE-276"],"severity":"MODERATE","nvd_published_at":"2025-07-18T16:15:30Z","github_reviewed":true},"references":[{"type":"WEB","url":"https://github.com/chainguard-dev/melange/security/advisories/GHSA-5662-cv6m-63wh"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-54059"},{"type":"WEB","url":"https://github.com/chainguard-dev/melange/pull/1836"},{"type":"WEB","url":"https://github.com/chainguard-dev/melange/pull/2086"},{"type":"WEB","url":"https://github.com/chainguard-dev/melange/commit/1b272db2a0bb3441553284cc56d87236b4b64c04"},{"type":"WEB","url":"https://github.com/chainguard-dev/melange/commit/e29494b4a40a91619ec1c87a09003c6d5164cea1"},{"type":"PACKAGE","url":"https://github.com/chainguard-dev/melange"},{"type":"WEB","url":"https://github.com/chainguard-dev/melange/releases/tag/v0.29.5"}],"affected":[{"package":{"name":"chainguard.dev/melange","ecosystem":"Go","purl":"pkg:golang/chainguard.dev/melange"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0.23.0"},{"fixed":"0.29.5"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/07/GHSA-5662-cv6m-63wh/GHSA-5662-cv6m-63wh.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L"}]}