# CVE-2026-54258: Cross-monitor event media authorization bypass in direct event media endpoints

> Authenticated low-privileged users can bypass monitor access controls to view private surveillance footage from restricted monitors via direct media endpoints.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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:** 11 Sep 2026
- **Updated:** 15 Sep 2026
- **Also known as:** DEBIAN-CVE-2026-54258, GHSA-vj5r-pc2v-gfwv, UBUNTU-CVE-2026-54258

## What is CVE-2026-54258?

CVE-2026-54258 is a medium-severity missing authorization vulnerability in zoneminder, published on 11 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

ZoneMinder is a free, open source closed-circuit television software application. Versions prior to 1.36.39, 1.38.4, and 1.39.11 allow an authenticated low-privileged user with coarse `Events=View` and/or `Snapshots=View` permissions to directly fetch media for events belonging to monitors they are not allowed to access. The normal UI correctly hides the restricted monitor and its events, but direct event media views accept an arbitrary `eid` and stream media from the event path without enforcing the event/monitor-level ACL. This exposes private surveillance footage across monitor boundaries. Versions 1.36.39, 1.38.4, and 1.39.11 fix the issue.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2026-54258?


## How do I fix CVE-2026-54258?

No fix has been published for CVE-2026-54258 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-54258 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-54258 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-54258 and fix it if it is affected.

What it is: CVE-2026-54258 is a medium-severity missing authorization vulnerability in zoneminder, published on 11 Sep 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-2026-54258 exists.

Affected product: zoneminder. 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-2026-54258/ (Markdown: https://insights.sbomify.com/CVE-2026-54258/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-54258
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-54258
- OSV: https://osv.dev/vulnerability/CVE-2026-54258

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-54258/
Summaries are generated and may contain mistakes; the official description above is the record.