{"id":"CVE-2026-55828","aliases":["GHSA-f9m7-vc86-p6jj","GO-2026-5352"],"url":"https://o3.security/vulnerability/CVE-2026-55828","summary":"qbee 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","published":"2026-09-15T15:14:52.244Z","modified":"2026-10-28T02:31:08.368558286Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Go","name":"go.qbee.io/transport","fixedVersion":"1.26.25"}],"fix":{"url":"https://github.com/qbee-io/transport/commit/43947671ba9be8fb08b105f3539a112ee7a57ddc","label":"qbee-io/transport@4394767"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55828.json"},{"type":"ADVISORY","url":"https://github.com/qbee-io/transport/security/advisories/GHSA-f9m7-vc86-p6jj"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55828"},{"type":"FIX","url":"https://github.com/qbee-io/transport/commit/43947671ba9be8fb08b105f3539a112ee7a57ddc"},{"type":"FIX","url":"https://github.com/qbee-io/transport/pull/19"},{"type":"PACKAGE","url":"https://github.com/qbee-io/transport"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-28T02:31:08.368558286Z"}}