# CVE-2026-53804: OTRS Community Edition OS Command Injection via PGP Configuration

> Administrators can execute arbitrary OS commands via unsanitized PGP configuration values in OTRS Community Edition.

- **Severity:** High 8.6 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Aug 2026
- **Updated:** 21 Aug 2026
- **Also known as:** GHSA-97wp-8phr-mg6x

## What is CVE-2026-53804?

CVE-2026-53804 is a high-severity command injection vulnerability in Centuran Consulting OTRS Community Edition, published on 20 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

OTRS Community Edition contains an authenticated OS command injection vulnerability in the PGP encryption module that allows administrators to execute arbitrary operating-system commands by supplying crafted values for the PGP binary path and command options. Administrator-supplied configuration values are concatenated without sanitization into a shell command, enabling arbitrary command execution as the web server process user during normal ticket operations after the malicious configuration is deployed.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2026-53804?


## How do I fix CVE-2026-53804?

No fix has been published for CVE-2026-53804 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-53804 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-53804 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-53804 and fix it if it is affected.

What it is: CVE-2026-53804 is a high-severity command injection vulnerability in Centuran Consulting OTRS Community Edition, published on 20 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-53804 exists.

Affected product: Centuran Consulting OTRS Community Edition. 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-2026-53804/ (Markdown: https://insights.sbomify.com/CVE-2026-53804/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-53804
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-53804
- OSV: https://osv.dev/vulnerability/CVE-2026-53804

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-53804/
Summaries are generated and may contain mistakes; the official description above is the record.