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.
Metrics
Affected Vendors & Products
References
History
Fri, 09 Oct 2026 09:30:00 +0000
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ssvc
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Fri, 09 Oct 2026 07:30:00 +0000
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Cisagov
Cisagov malcolm |
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| Vendors & Products |
Cisagov
Cisagov malcolm |
Thu, 08 Oct 2026 17:45:00 +0000
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| 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. | |
| Title | Incorrect Authorization in Malcolm | |
| Weaknesses | CWE-863 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: icscert
Published: 2026-10-08T17:32:00.480Z
Updated: 2026-10-14T19:35:58.181Z
Reserved: 2026-10-07T18:31:15.966Z
Link: CVE-2026-107334
Updated: 2026-10-08T19:04:40.324Z
Status : Awaiting Analysis
Published: 2026-10-08T18:17:19.763
Modified: 2026-10-08T21:03:43.847
Link: CVE-2026-107334
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