# CVE-2026-107334: Incorrect Authorization in Malcolm

> Authenticated low-privilege users can bypass RBAC restrictions and access admin-only paths by using percent-encoded URIs in Malcolm network security platform.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/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-jr6p-63pg-hr6g, GHSA-rgrh-q687-4gc8

## What is CVE-2026-107334?

CVE-2026-107334 is a medium-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 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.

Weakness: CWE-863 (Incorrect Authorization)

## Which versions are affected by CVE-2026-107334?


## How do I fix CVE-2026-107334?

No fix has been published for CVE-2026-107334 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-107334 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-107334 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-107334 and fix it if it is affected.

What it is: CVE-2026-107334 is a medium-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: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-107334 exists.

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-2026-107334/ (Markdown: https://insights.sbomify.com/CVE-2026-107334/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-107334
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-107334
- OSV: https://osv.dev/vulnerability/CVE-2026-107334

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-107334/
Summaries are generated and may contain mistakes; the official description above is the record.