# CVE-2025-26842: Missing authorization in n/a

> Users with CommunicationLog access can view S/MIME encrypted email content in Znuny tickets they are not authorized to access.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 8 May 2025
- **Updated:** 8 May 2025
- **Also known as:** DEBIAN-CVE-2025-26842, GHSA-c2x5-mpj8-v9v9, UBUNTU-CVE-2025-26842

## What is CVE-2025-26842?

CVE-2025-26842 is a high-severity missing authorization vulnerability in n/a, published on 8 May 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in Znuny through 7.1.3. If access to a ticket is not given, the content of S/MIME encrypted e-mail messages is visible to users with access to the CommunicationLog.

Weakness: CWE-863 (Incorrect Authorization)

## Which versions are affected by CVE-2025-26842?

It affects 1 product.


Products: Znuny Znuny.

## How do I fix CVE-2025-26842?

Apply the vendor's patch.

## Is CVE-2025-26842 being exploited?

There is no known exploitation of CVE-2025-26842 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2025-26846](https://insights.sbomify.com/CVE-2025-26846/): An issue was discovered in Znuny before 7.1.4. (critical 9.8)
- [CVE-2025-26844](https://insights.sbomify.com/CVE-2025-26844/): Information disclosure in n/a (critical 9.8)
- [CVE-2025-26845](https://insights.sbomify.com/CVE-2025-26845/): Code injection in n/a (critical 9.8)
- [CVE-2024-32491](https://insights.sbomify.com/CVE-2024-32491/): Path traversal in n/a (critical 9.8)
- [CVE-2025-26847](https://insights.sbomify.com/CVE-2025-26847/): Information disclosure in n/a (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-26842 and fix it if it is affected.

What it is: CVE-2025-26842 is a high-severity missing authorization vulnerability in n/a, published on 8 May 2025. 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-2025-26842 in the wild and no public exploit code.

Affected product: n/a. 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-2025-26842/ (Markdown: https://insights.sbomify.com/CVE-2025-26842/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-26842
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-26842
- OSV: https://osv.dev/vulnerability/CVE-2025-26842

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-26842/
Summaries are generated and may contain mistakes; the official description above is the record.