All vulnerabilities
CVE-2026-107334GHSA-jr6p-63pg-hr6g

Incorrect Authorization in Malcolm

CISA Malcolm
CVSS
5.4Medium
ExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 8 Oct 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.21%Chance of exploitation activity in the next 30 days, higher than 11% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version yet
Published8 Oct 2026Updated 14 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version.

Reports 1

1 outlet mention it. Reports are not confirmation; each links to its source.

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.

Text from CVE List

Affected versions 2

  • Malcolmaffected: all versions through 26.07.1CVE List
  • Malcolmunaffected: 26.08.0CVE List

References 2