CVE-2026-68548

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-68548", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-07-30T19:56:44.101Z", "datePublished": "2026-11-12T19:39:10.279Z", "dateUpdated": "2026-11-13T00:25:32.382Z"}, "containers": {"cna": {"title": "Algernon: Case-insensitive filesystem lets unauthenticated requests bypass /admin,/repo,/data permission-prefix gate", "problemTypes": [{"descriptions": [{"cweId": "CWE-178", "lang": "en", "description": "CWE-178: Improper Handling of Case Sensitivity", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-863", "lang": "en", "description": "CWE-863: Incorrect Authorization", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 9.4, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L", "version": "3.1"}}], "references": [{"name": "https://github.com/xyproto/algernon/security/advisories/GHSA-vm84-8c4p-64hx", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/xyproto/algernon/security/advisories/GHSA-vm84-8c4p-64hx"}, {"name": "https://github.com/xyproto/algernon/releases/tag/v1.17.10", "tags": ["x_refsource_MISC"], "url": "https://github.com/xyproto/algernon/releases/tag/v1.17.10"}], "affected": [{"vendor": "xyproto", "product": "algernon", "versions": [{"version": "< 1.17.10", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-11-12T19:39:10.279Z"}, "descriptions": [{"lang": "en", "value": "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 \u2014 always; macOS APFS/HFS+ \u2014 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."}], "source": {"advisory": "GHSA-vm84-8c4p-64hx", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/xyproto/algernon/security/advisories/GHSA-vm84-8c4p-64hx", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-11-13T00:25:03.923254Z", "id": "CVE-2026-68548", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-13T00:25:32.382Z"}}]}}

{}

{"affected": [{"affectedData": [{"product": "algernon", "vendor": "xyproto", "versions": [{"status": "affected", "version": "< 1.17.10"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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 \u2014 always; macOS APFS/HFS+ \u2014 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."}], "id": "CVE-2026-68548", "lastModified": "2026-11-13T02:18:58.730", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 9.4, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.5, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-68548", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-11-13T00:25:03.923254Z", "version": "2.0.3"}}]}, "published": "2026-11-12T20:18:51.307", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/xyproto/algernon/releases/tag/v1.17.10"}, {"source": "security-advisories@github.com", "url": "https://github.com/xyproto/algernon/security/advisories/GHSA-vm84-8c4p-64hx"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/xyproto/algernon/security/advisories/GHSA-vm84-8c4p-64hx"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-178"}, {"lang": "en", "value": "CWE-863"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.17.10)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "algernon", "source": "cna", "vendor": "xyproto"}, "product": "algernon", "vendor": "xyproto"}], "created": "2026-11-13T07:15:09.583125+00:00", "updated": "2026-11-13T07:15:09.583173+00:00", "vendors": ["xyproto", "xyproto$PRODUCT$algernon"]}