{"id":"CVE-2026-107334","state":"PUBLISHED","title":"Incorrect Authorization in Malcolm","description":"Malcolm's nginx Lua role-based access control (RBAC) layer decides whether an authenticated user may reach a role-restricted path (e.g. /htadmin, /auth, /admin_login, /arkime/api/esadmin, NetBox, upload endpoints) by pattern-matching the raw, percent-encoded request URI. Nginx itself, however, selects which location block actually serves the request using the percent-decoded, normalized URI. Because the RBAC check never percent-decodes its input, an authenticated low-privilege user can request an admin-only path using percent-encoding (e.g. /%68tadmin.php) and have nginx route it to the restricted location while the Lua RBAC gate evaluating the un-decoded raw string finds no matching restriction and grants access.","publishedAt":"2026-10-08T17:32:00.480Z","updatedAt":"2026-10-14T19:35:58.181Z","severity":{"score":5.4,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","source":"icscert"},"assigner":"icscert","products":["CISA Malcolm"],"affected":[{"vendor":"CISA","product":"Malcolm","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"26.07.1","versionType":"custom"},{"version":"26.08.0","status":"unaffected"}]}],"references":["https://github.com/cisagov/Malcolm/security/advisories/GHSA-jr6p-63pg-hr6g","https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-280-01.json"],"weaknesses":["CWE-863"],"ingestedAt":"2026-10-29T20:10:23.711Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/107xxx/CVE-2026-107334.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-107334","state":"PUBLISHED","datePublished":"2026-10-08T17:32:00.480Z","dateUpdated":"2026-10-14T19:35:58.181Z","assignerShortName":"icscert","assignerOrgId":"7d14cffa-0d7d-4270-9dc0-52cabd5a23a6","dateReserved":"2026-10-07T18:31:15.966Z"},"containers":{"cna":{"title":"Incorrect Authorization in Malcolm","descriptions":[{"lang":"en","value":"Malcolm's nginx Lua role-based access control (RBAC) layer decides whether an authenticated user may reach a role-restricted path (e.g. /htadmin, /auth, /admin_login, /arkime/api/esadmin, NetBox, upload endpoints) by pattern-matching the raw, percent-encoded request URI. Nginx itself, however, selects which location block actually serves the request using the percent-decoded, normalized URI. Because the RBAC check never percent-decodes its input, an authenticated low-privilege user can request an admin-only path using percent-encoding (e.g. /%68tadmin.php) and have nginx route it to the restricted location while the Lua RBAC gate evaluating the un-decoded raw string finds no matching restriction and grants access."}],"affected":[{"vendor":"CISA","product":"Malcolm","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"26.07.1","versionType":"custom"},{"version":"26.08.0","status":"unaffected"}]}],"references":[{"url":"https://github.com/cisagov/Malcolm/security/advisories/GHSA-jr6p-63pg-hr6g"},{"url":"https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-280-01.json","tags":["government-resource"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE","baseSeverity":"MEDIUM","baseScore":5.4,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-863","lang":"en","description":"CWE-863 Incorrect Authorization","type":"CWE"}]}],"providerMetadata":{"shortName":"icscert","orgId":"7d14cffa-0d7d-4270-9dc0-52cabd5a23a6","dateUpdated":"2026-10-14T19:35:58.181Z"},"datePublic":"2026-10-07T19:02:00.000Z","solutions":[{"lang":"en","value":"Update to version v26.08.0","supportingMedia":[{"type":"text/html","base64":false,"value":"Update to version v26.08.0"}]}],"credits":[{"lang":"en","value":"Seth Grover","type":"finder"},{"lang":"en","value":"tinyb0y","type":"reporter"}],"source":{"advisory":"ICSA-26-280-01","discovery":"INTERNAL"},"x_generator":{"engine":"Vulnogram 1.0.5"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/cisagov/Malcolm/security/advisories/GHSA-jr6p-63pg-hr6g","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-08T19:04:22.822418Z","id":"CVE-2026-107334","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-08T19:04:45.258Z"}}]}}}