All vulnerabilities
CVE-2026-107333GHSA-v66f-cwcm-hf73

Incorrect Authorization in Malcolm

CISA Malcolm
Open in ThreatlineRecord JSON
CVSS
8.1High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.98%Chance of exploitation activity in the next 30 days, higher than 61% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Published8 Oct 2026Updated 14 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Reports 1

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

Description

Malcolm's nginx based reverse proxy contains a URL path normalization inconsistency between its Lua based role-based access control (RBAC) authorization layer and nginx's own request routing logic. An authenticated user can craft a specially formatted request path to bypass role-based restrictions and reach administrative or role gated endpoints they should not have access to. This affects all restricted paths protected by the RBAC authorization layer, including file upload, PHP server, htadmin, and authentication management interfaces.

Text from CVE List

Affected versions 3

  • Malcolmaffected: all versions through 26.07.1CVE List
  • Malcolmunaffected: 26.08.0CVE List
  • Malcolm<= v26.08.0GitHub

References 2