# CVE-2026-107333: Incorrect Authorization in Malcolm

> Authenticated users can bypass RBAC restrictions via path normalization flaws to access administrative endpoints in Malcolm.

- **Severity:** High 8.1 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 Oct 2026
- **Updated:** 14 Oct 2026
- **Also known as:** GHSA-v66f-cwcm-hf73, GHSA-x76r-x5vc-mv69

## What is CVE-2026-107333?

CVE-2026-107333 is a high-severity authentication bypass vulnerability in CISA Malcolm, published on 8 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official 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.

Weakness: CWE-863 (Incorrect Authorization)

## Which versions are affected by CVE-2026-107333?


## How do I fix CVE-2026-107333?

No fix has been published for CVE-2026-107333 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-107333 being exploited?

There is no known exploitation of CVE-2026-107333 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-107333 and fix it if it is affected.

What it is: CVE-2026-107333 is a high-severity authentication bypass vulnerability in CISA Malcolm, published on 8 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-107333 in the wild and no public exploit code.

Affected product: CISA Malcolm. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-107333/ (Markdown: https://insights.sbomify.com/CVE-2026-107333/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-107333
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-107333
- OSV: https://osv.dev/vulnerability/CVE-2026-107333

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-107333/
Summaries are generated and may contain mistakes; the official description above is the record.