{"id":"CVE-2026-55825","summary":"Contao: Possible path traversal in job download URIs","details":"Contao is an Open Source CMS. In versions 5.7.0 through 5.7.6, an authenticated backend user who can access one job can request an attachment identifier containing ../ segments and make the job attachment download endpoint read a file from another job directory inside var/job-attachments. The controller authorizes only the jobUuid route parameter. The later attachment lookup joins that authorized job UUID with the attacker-controlled identifier, then passes the combined path to the virtual filesystem. VirtualFilesystem::resolve() canonicalizes the whole path and only rejects paths that escape the filesystem mount, so authorized-job/../victim-job/debug_log.csv becomes victim-job/debug_log.csv. This is a cross-job authorization bypass for known job attachment paths. It is not a practical brute-force against unknown jobs because job directories are UUID v4 values.","aliases":["GHSA-grm4-wm43-9jh5"],"modified":"2026-08-04T11:51:10.917846732Z","published":"2026-07-31T19:07:40.609Z","database_specific":{"cwe_ids":["CWE-22"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55825.json","cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55825.json"},{"type":"ADVISORY","url":"https://github.com/contao/contao/security/advisories/GHSA-grm4-wm43-9jh5"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55825"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/contao/contao","events":[{"introduced":"72bb9e0235574397cf06a2165dc21fdd19186c74"},{"fixed":"1f8131ccf1950bba4130884e7320b649223dcfc3"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"5.7.0"},{"fixed":"5.7.7"}]}}],"versions":["5.7.6","5.7.5","5.7.4","5.7.3","5.7.2","5.7.1","5.7.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55825.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N"}]}