{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-63177", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-07-15T22:13:00.720Z", "datePublished": "2026-08-11T20:30:57.901Z", "dateUpdated": "2026-08-11T20:30:57.901Z"}, "containers": {"cna": {"title": "Malcolm Vulnerable to Authorization Bypass via URI Normalization Differential in Nginx Lua RBAC", "problemTypes": [{"descriptions": [{"cweId": "CWE-863", "lang": "en", "description": "CWE-863: Incorrect Authorization", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/cisagov/Malcolm/security/advisories/GHSA-m5fr-rv3h-xg2r", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/cisagov/Malcolm/security/advisories/GHSA-m5fr-rv3h-xg2r"}, {"name": "https://github.com/cisagov/Malcolm/releases/tag/v26.07.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/cisagov/Malcolm/releases/tag/v26.07.0"}], "affected": [{"vendor": "cisagov", "product": "Malcolm", "versions": [{"version": "< 26.07.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-08-11T20:30:57.901Z"}, "descriptions": [{"lang": "en", "value": "Malcolm is a network traffic analysis tool suite. Prior to version 26.07.0, role-based access control enforced in the Nginx OpenResty Lua layer evaluates the raw, unnormalized `ngx.var.request_uri`, while Nginx itself routes requests using the normalized path. An authenticated low-privilege user can prepend a traversal segment (for example `/x/../upload/...`) so that Nginx routes the request to a restricted backend while the Lua role check fails to match any rule and falls open, granting access it should deny. Version 26.07.0 fixes the issue."}], "source": {"advisory": "GHSA-m5fr-rv3h-xg2r", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "Malcolm", "vendor": "cisagov", "versions": [{"status": "affected", "version": "< 26.07.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Malcolm is a network traffic analysis tool suite. Prior to version 26.07.0, role-based access control enforced in the Nginx OpenResty Lua layer evaluates the raw, unnormalized `ngx.var.request_uri`, while Nginx itself routes requests using the normalized path. An authenticated low-privilege user can prepend a traversal segment (for example `/x/../upload/...`) so that Nginx routes the request to a restricted backend while the Lua role check fails to match any rule and falls open, granting access it should deny. Version 26.07.0 fixes the issue."}], "id": "CVE-2026-63177", "lastModified": "2026-08-11T21:17:44.443", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 4.2, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-08-11T21:17:44.443", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/cisagov/Malcolm/releases/tag/v26.07.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/cisagov/Malcolm/security/advisories/GHSA-m5fr-rv3h-xg2r"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-863"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}