# CVE-2026-34094: Open redirect in MediaWiki

> An attacker can exploit a missing prefix in help links to redirect users to unintended locations, potentially bypassing security controls.

- **Severity:** Low 2.0 (`CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 11 May 2026
- **Updated:** 11 May 2026
- **Also known as:** DEBIAN-CVE-2026-34094, GHSA-g863-m67x-whh5, UBUNTU-CVE-2026-34094

## What is CVE-2026-34094?

CVE-2026-34094 is a low-severity vulnerability in Mediawiki Mediawiki, published on 11 May 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

Vulnerability in Wikimedia Foundation MediaWiki.

 This vulnerability is associated with program files includes/Page/Article.Php.

This issue affects MediaWiki: from * before 1.43.7, 1.44.4, 1.45.2.

Weakness: CWE-668 (Exposure of Resource to Wrong Sphere)

## Which versions are affected by CVE-2026-34094?

It affects 1 product.


Products: Mediawiki Mediawiki.

## How do I fix CVE-2026-34094?

Upgrade to a fixed version.

## Is CVE-2026-34094 being exploited?

There is no known exploitation of CVE-2026-34094 in the wild and no public exploit code.

## Other vulnerabilities in Mediawiki Mediawiki

- [CVE-2023-37303](https://insights.sbomify.com/CVE-2023-37303/): Denial of service in n/a (critical 9.8)
- [CVE-2022-29904](https://insights.sbomify.com/CVE-2022-29904/): SQL injection in n/a (critical 9.8)
- [CVE-2022-29906](https://insights.sbomify.com/CVE-2022-29906/): Missing authorization in n/a (critical 9.8)
- [CVE-2022-28205](https://insights.sbomify.com/CVE-2022-28205/): Business logic in n/a (critical 9.8)
- [CVE-2022-28206](https://insights.sbomify.com/CVE-2022-28206/): Missing authorization in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-34094 and fix it if it is affected.

What it is: CVE-2026-34094 is a low-severity vulnerability in Mediawiki Mediawiki, published on 11 May 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-34094 in the wild and no public exploit code.

Affected product: Mediawiki Mediawiki. 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-2026-34094/ (Markdown: https://insights.sbomify.com/CVE-2026-34094/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-34094
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-34094
- OSV: https://osv.dev/vulnerability/CVE-2026-34094

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-34094/
Summaries are generated and may contain mistakes; the official description above is the record.