{"id":"CVE-2026-55828","summary":"qbee transport: Symlink-chain path traversal in tar extraction (one level outside destination)","details":"qbee transport is a remote access transport protocol implementation. Prior to 1.26.25, the extractTar routine uses strictly lexical path validation that does not account for on-disk symlinks created earlier in the extraction process. A crafted tar archive can use a symlink chain to write or overwrite files one directory level above the intended extraction path. When qbee-agent performs the extraction with root privileges, this permits a root-privileged file write outside the intended destination. This issue is fixed in version 1.26.25.","aliases":["GHSA-f9m7-vc86-p6jj","GO-2026-5352"],"modified":"2026-09-17T03:47:21.304975033Z","published":"2026-09-15T15:14:52.244Z","related":["openSUSE-SU-2026:21483-1"],"database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-22","CWE-59"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55828.json"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/qbee-io/transport","events":[{"introduced":"0"},{"fixed":"43947671ba9be8fb08b105f3539a112ee7a57ddc"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"1.26.25"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v1.26.18","v1.26.16","v1.25.28","v1.25.12","v1.24.33","v1.24.27","v1.24.8","v1.24.7","v1.24.6","v1.24.5-pre4","v1.24.5","v1.24.5-pre3","v1.24.5-pre2","v1.24.5-pre1","v1.24.5-pre0","v1.24.4-1","v1.24.4"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-55828.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"}]}