CVE-2026-107333

Incorrect Authorization in Malcolm

State
Published
Severity
8.1 High
Published
Oct 8, 2026
Updated
Oct 14, 2026
Reserved
Oct 7, 2026

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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.

Scores

CVSSScoreVectorSource
3.18.1 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Nicscert

Weaknesses

Affected Products

ProductVersions
MalcolmCISA
  • 26.07.1 and earlierAffected
  • 26.08.0Not affected

References

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