{"id":"GHSA-f9m7-vc86-p6jj","summary":"go.qbee.io/transport: Symlink-chain path traversal in tar extraction (one level outside destination)","details":"### Impact\n\nThe go.qbee.io/transport library is affected by a symlink-chain path traversal vulnerability in its extractTar routine. The library's path validation is strictly lexical and fails to account for on-disk symlinks created earlier in the extraction process. Consequently, a crafted tar archive can be used to write or overwrite files one directory level above the intended extraction path. In the case of qbee-agent, which runs with root privileges, this vulnerability permits a root-privileged file write outside the intended destination.\n\n### Patches\n\nThe issue has been addressed in version v1.26.25","aliases":["CVE-2026-55828","GO-2026-5352"],"modified":"2026-06-25T19:56:16.807337495Z","published":"2026-06-19T21:15:31Z","database_specific":{"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2026-06-19T21:15:31Z","nvd_published_at":null,"cwe_ids":["CWE-22","CWE-59"]},"references":[{"type":"WEB","url":"https://github.com/qbee-io/transport/security/advisories/GHSA-f9m7-vc86-p6jj"},{"type":"PACKAGE","url":"https://github.com/qbee-io/transport"}],"affected":[{"package":{"name":"go.qbee.io/transport","ecosystem":"Go","purl":"pkg:golang/go.qbee.io/transport"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.26.25"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-f9m7-vc86-p6jj/GHSA-f9m7-vc86-p6jj.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N"}]}