{"id":"CVE-2026-54528","summary":"jupyterlab-git excluded_paths Case-Sensitivity Bypass Allows Reading Excluded Directories","details":"JupyterLab Git is a Git extension for JupyterLab. Prior to 0.54.0, jupyterlab-git uses fnmatch.fnmatchcase() in GitHandler.prepare() in jupyterlab_git/handlers.py to enforce excluded_paths, allowing an authenticated user on a case-insensitive filesystem to vary URL path casing and read excluded directories. This issue is fixed in version 0.54.0.","aliases":["GHSA-436q-jwfr-rm2h","PYSEC-2026-2539"],"modified":"2026-07-15T01:49:14.647468562Z","published":"2026-07-08T21:04:18.613Z","database_specific":{"cwe_ids":["CWE-178"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54528.json","cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://github.com/jupyterlab/jupyterlab-git/releases/tag/v0.54.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54528.json"},{"type":"ADVISORY","url":"https://github.com/jupyterlab/jupyterlab-git/security/advisories/GHSA-436q-jwfr-rm2h"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54528"},{"type":"FIX","url":"https://github.com/jupyterlab/jupyterlab-git/commit/460035275b5963dc96e364e60ba6a73717fbd033"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/jupyterlab/jupyterlab-git","events":[{"introduced":"0"},{"fixed":"460035275b5963dc96e364e60ba6a73717fbd033"},{"fixed":"ccbf077d2149c6b2ed35eae8a7123ae129c022aa"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"0.54.0"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v0.54.0a1","v0.54.0a0","v0.53.0","v0.53.0a1","v0.53.0a0","v0.52.0","v0.51.4","v0.51.3","v0.51.2","v0.51.1","v0.51.0","v0.50.2","v0.50.1","v0.50.0","v0.50.0rc0","v0.44.0","v0.50.0a2","v0.50.0a1","v0.50.0a0","v0.43.0","v0.42.0","v0.42.0rc0","v0.41.0","v0.40.1","v0.40.0","v0.39.3.post1","v0.39.3","v0.39.2","v0.39.1","v0.39.0","v0.38.0","v0.37.1","v0.37.0","v0.36.0","v0.35.0","v0.34.2","v0.34.1","v0.34.0","v0.33.0","v0.32.2","v0.32.1","v0.32.0","v0.31.0","v0.31.0a0","v0.30.1","v0.30.0","v0.30.0b3","v0.30.0b2","v0.30.0b1.post1","v0.30.0b1","v0.23.3","v0.23.2","v0.23.1","v0.23.0","v0.22.3","v0.22.2","v0.22.1","v0.22.0","v0.21.1","v0.21.0","v0.21.0rc0","v0.21.0a1","v0.21.0a0","v0.9.0rc1","v0.9.0","v0.8.2","v0.8.1","v0.8","v0.7.1","v0.6.1-alpha.0","v0.6.1","v0.6.0","v0.5.0","v0.4.4","v0.4.2","v0.4.1","v0.4.0","v0.3.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54528.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N"}]}