{"id":"CVE-2026-68548","summary":"Algernon: Case-insensitive filesystem lets unauthenticated requests bypass /admin,/repo,/data permission-prefix gate","details":"Algernon is a small self-contained pure-Go web server. Prior to version 1.17.10, Algernon's URL-prefix authorization gate matches its protected prefixes (/admin, /repo, /data) with case-sensitive strings.HasPrefix, while the exact same raw req.URL.Path is later resolved against the filesystem. On case-insensitive filesystems (Windows NTFS — always; macOS APFS/HFS+ — default), a request for /Admin/secret.lua evades every protected-prefix check, falls through to the public-prefix accept branch, and then resolves on disk to admin/secret.lua. The result is an unauthenticated bypass of the /admin, /repo, and /data authorization boundary, enabling read (and, for Lua files, execution) of protected content. The permission system is active in the default configuration. This issue has been patched in version 1.17.10.","aliases":["GHSA-vm84-8c4p-64hx"],"modified":"2026-11-14T02:47:39.071979269Z","published":"2026-11-12T19:39:10.279Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68548.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-178","CWE-863"]},"references":[{"type":"WEB","url":"https://github.com/xyproto/algernon/releases/tag/v1.17.10"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68548.json"},{"type":"ADVISORY","url":"https://github.com/xyproto/algernon/security/advisories/GHSA-vm84-8c4p-64hx"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68548"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/xyproto/algernon","events":[{"introduced":"0"},{"fixed":"505c79740bd08c171aefff0ce181daba9f3d1cfa"}],"database_specific":{"extracted_events":[{"source":"AFFECTED_FIELD","strategy":"StringRangeExpression","range":[{"introduced":"0"},{"fixed":"1.17.10"}]},{"original_tag":"v1.17.10","range":[{"fixed":"505c79740bd08c171aefff0ce181daba9f3d1cfa"}],"source":"REFERENCES_TAG"},{"source":"DESCRIPTION","range":[{"introduced":"0"},{"fixed":"1.17.10"}]}]}}],"versions":["v1.17.9","v1.17.8","v1.17.7","v1.17.6","v1.17.5","v1.17.4","v1.17.3","v1.17.2","v1.17.1","v1.17.0","v1.16.0","v1.15.5","v1.15.4","v1.15.3","v1.15.2","v1.15.1","v1.15.0","v1.14.0","v1.13.0","1.12.14","1.12.12","1.12.11","1.12.10","1.12.9","1.12.8","1.12.7","1.12.6","1.12.5","1.12.4","1.12.3","1.12.2","1.12.1","1.12.0","1.11.0","1.10.1","1.10","1.9","1.8","1.7","1.6","v1.5","1.5.1","1.5","1.4.5","1.4.4","1.4.3","1.4.2","1.4.1","1.4","1.3.2","1.3.1","1.3","1.2.1","1.2","1.1","1.0","0.92","0.91","0.9","0.89","0.88","0.87","0.86","0.85","0.84","0.83","0.82","0.81","0.8","0.75","0.74","0.73","0.72","0.71","0.7","0.68","0.67","0.66","0.65","0.64","0.63","0.62","0.61","0.59","0.58","0.57","0.56","0.55","0.54","0.53","0.52","0.51","0.50","0.49","0.48","0.47","0.46","0.45","0.44","0.43","0.42","0.41","0.4","0.3","0.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68548.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L"}]}