{"id":"CVE-2026-19670","title":"Malcolm's nginx Lua role-based access control (RBAC) layer decides whether an authenticated user may reach a role-restricted path (e.g","summary":"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…","severity":"medium","cvss":5.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","cwe":["CWE-863"],"published":"2026-08-18","updated":"2026-09-08","sourceUpdated":"2026-09-08T15:28:33.090","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-19670","references":[{"url":"https://github.com/cisagov/Malcolm/security/advisories/GHSA-f2v6-8cj4-mhr6","label":"ics-cert@hq.dhs.gov"},{"url":"https://www.cisa.gov/news-events/ics-advisories/icsa-26-230-01","label":"ics-cert@hq.dhs.gov"},{"url":"https://github.com/cisagov/Malcolm/security/advisories/GHSA-f2v6-8cj4-mhr6","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"epss":0.00222,"epssPercentile":0.13086,"ingestedAt":"2026-09-08T15:33:26.954Z","slug":"CVE-2026-19670","body":"## Overview\n\nMalcolm'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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":29.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}