# CVE-2026-77141: Broken Access Control in extension "Club Directory" (clubdirectory)

> Unauthenticated attackers can modify or publish club records without ownership checks, requiring TYPO3 administrators to patch the Club Directory extension.

- **Severity:** High 8.8 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 25 Aug 2026
- **Updated:** 27 Aug 2026
- **Also known as:** GHSA-vxhm-2hqq-3mjf

## What is CVE-2026-77141?

CVE-2026-77141 is a high-severity missing authorization vulnerability in TYPO3 Extension "Club Directory", published on 25 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The extension resolves the targeted club record from a user-supplied request argument in its frontend edit, update, and activate actions, but performs no ownership check in any of them. An unauthenticated visitor who knows the UID of a club record can send a direct request to the update or activate action and overwrite that record, or publish one still awaiting approval, without owning it.

Weakness: CWE-862 (Missing Authorization), CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2026-77141?


## How do I fix CVE-2026-77141?

No fix has been published for CVE-2026-77141 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-77141 being exploited?

There is no known exploitation of CVE-2026-77141 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-77141 and fix it if it is affected.

What it is: CVE-2026-77141 is a high-severity missing authorization vulnerability in TYPO3 Extension "Club Directory", published on 25 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-77141 in the wild and no public exploit code.

Affected product: TYPO3 Extension "Club Directory". 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-2026-77141/ (Markdown: https://insights.sbomify.com/CVE-2026-77141/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-77141
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-77141
- OSV: https://osv.dev/vulnerability/CVE-2026-77141

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-77141/
Summaries are generated and may contain mistakes; the official description above is the record.