{"id":"CVE-2026-40256","summary":"Weblate: Prefix-Based Repository Boundary Check Bypass via Symlink/Junction Path Prefix Collision","details":"Weblate is a web based localization tool. In versions prior to 5.17, repository-boundary validation relies on string prefix checks on resolved absolute paths. In multiple code paths, the check uses startswith against the repository root path. This is not path-segment aware and can be bypassed when the external path shares the same string prefix as the repository path (for example, repo and repo_outside). This issue has been fixed in version 5.17.","aliases":["GHSA-ffgh-3jrf-8wvh","PYSEC-2026-2315"],"modified":"2026-08-05T03:46:47.301639949Z","published":"2026-04-15T18:36:44.975Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40256.json","unresolved_ranges":[{"extracted_events":[{"fixed":"5.17"}],"source":"AFFECTED_FIELD"}],"cna_assigner":"GitHub_M","cwe_ids":["CWE-22"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40256.json"},{"type":"ADVISORY","url":"https://github.com/WeblateOrg/weblate/security/advisories/GHSA-ffgh-3jrf-8wvh"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40256"},{"type":"FIX","url":"https://github.com/WeblateOrg/weblate/commit/e30dbcb33ae78e754ecef192d54f996b89cb4e15"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/weblateorg/weblate","events":[{"introduced":"0"},{"fixed":"e30dbcb33ae78e754ecef192d54f996b89cb4e15"}],"database_specific":{"source":"REFERENCES"}}],"versions":["weblate-5.16.1","weblate-5.16","weblate-5.15.2","weblate-5.15.1","weblate-5.15","weblate-5.14.1","weblate-5.14","weblate-5.13.2","weblate-5.13.1","weblate-5.13","weblate-5.12.2","weblate-5.12.1","weblate-5.12","weblate-5.11.1","weblate-5.11","weblate-5.10.3","weblate-5.10.2","weblate-5.10.1","weblate-5.10","weblate-5.9.2","weblate-5.9.1","weblate-5.9","weblate-5.8.2","weblate-5.8.1","weblate-5.8","weblate-5.7.2","weblate-5.7.1","weblate-5.7","weblate-5.6.1","weblate-5.6","weblate-5.5.5","weblate-5.5.4","weblate-5.5.3","weblate-5.5.2","weblate-5.5.1","weblate-5.5","weblate-5.4","weblate-5.3","weblate-5.2.1","weblate-5.2","weblate-5.1.1","weblate-5.1","weblate-5.0.2","weblate-5.0.1","weblate-4.18.1","weblate-4.18","weblate-4.17","weblate-4.16.2","weblate-4.16.1","weblate-4.16","weblate-4.15.1","weblate-4.15","weblate-4.14.2","weblate-4.14.1","weblate-4.14","weblate-4.13.1","weblate-4.13","weblate-4.12.1","weblate-4.12","weblate-4.11.2","weblate-4.11.1","weblate-4.11","weblate-4.10.1","weblate-4.10","weblate-4.9.1","weblate-4.9","weblate-4.8.1","weblate-4.8","weblate-4.7.2","weblate-4.7.1","weblate-4.7","weblate-4.6","weblate-4.5.2","weblate-4.5.1","weblate-4.5","weblate-4.4.1","weblate-4.4","weblate-4.3.2","weblate-4.3.1","weblate-4.3","weblate-4.2.1","weblate-4.2","weblate-4.1.1","weblate-4.1","weblate-4.0.2","weblate-4.0.1","weblate-4.0","weblate-3.11.1","weblate-3.11","weblate-3.10.2","weblate-3.10.1","weblate-3.10","weblate-3.9.1","weblate-3.9","weblate-3.8","weblate-3.7.1","weblate-3.7","weblate-3.6.1","weblate-3.6","weblate-3.5.1","weblate-3.5","weblate-3.4","weblate-3.3","weblate-3.2.1","weblate-3.2","weblate-3.1.1","weblate-3.1","weblate-3.0.1","weblate-3.0","weblate-2.20","weblate-2.19.1","weblate-2.19","weblate-2.18","weblate-2.17","weblate-2.16","weblate-2.15","weblate-2.14.1","weblate-2.14","weblate-2.13.1","weblate-2.13","weblate-2.12","weblate-2.11","weblate-2.10","weblate-2.9","weblate-2.8","weblate-2.7","weblate-2.5","weblate-2.4","weblate-2.3","weblate-2.2","weblate-2.1","weblate-1.9","weblate-1.8","weblate-1.7","weblate-1.6","weblate-1.5","weblate-1.4","weblate-1.3","weblate-1.2","weblate-1.1","weblate-1.0","weblate-0.9","weblate-0.8","weblate-0.6","weblate-0.5","weblate-0.3","weblate-0.2","weblate-0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40256.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N"}]}