# CVE-2026-55229: Gotenberg - SSRF

> Live exploitation tracking for CVE-2026-55229 by the CrowdSec Live Exploit Tracker, built from real-world attack data crowdsourced from CrowdSec's global network.

Page: https://tracker.crowdsec.net/cves/CVE-2026-55229

## Key facts

- **Exploitation phase:** Active Exploitation. The vulnerability is actively exploited at scale across the internet, often via automated tools and large attack campaigns.
- **CVSS score:** 7.5
- **Public exploit available:** Yes
- **Affected products:** Gotenberg
- **Weaknesses:** CWE-918 (Server-Side Request Forgery (SSRF))
- **Tags:** web_application

## Description

Gotenberg is a Docker-powered stateless API for PDF files. Prior to 8.34.0, Gotenberg's /forms/libreoffice/convert endpoint allows a specially crafted document to cause LibreOffice to automatically retrieve external HTTP(S) resources and local file resources during document conversion, enabling blind SSRF and limited local file disclosure via linked image resource loading. This issue is fixed in version 8.34.0.

## CrowdSec analysis

[CVE-2026-55229](https://euvd.enisa.europa.eu/vulnerability/CVE-2026-55229) is a high-severity server-side request forgery (SSRF) vulnerability in Gotenberg versions prior to 8.34.0. A specially crafted document processed through the LibreOffice conversion endpoint can force the service to retrieve external HTTP(S) resources or local files, enabling blind SSRF attacks and limited local file disclosure.

CrowdSec has been tracking this vulnerability and its exploits since 17th of September 2026.

CrowdSec network data shows that most actors exploiting CVE-2026-55229 rely on broad, untargeted scans with minimal filtering. The activity is largely automated and opportunistic in nature.
CrowdSec data also reveals a clear uptick in attacks involving CVE-2026-55229 over the past week. Activity is above the usual baseline, suggesting growing attention from attackers. This may reflect rising awareness, recent exploit releases, or expanded targeting efforts.

Attackers target the `/forms/libreoffice/convert` endpoint by uploading a crafted DOCX containing external relationships that reference local files or remote URLs. Successful exploitation may cause LibreOffice to fetch and embed these resources in a generated PDF, enabling limited local file disclosure or blind SSRF.

## Timeline

- 2026-07-10: CVE Published. CVE-2026-55229 is published to NVD.
- 2026-09-17: Rule Released. CrowdSec releases a rule to detect CVE-2026-55229 exploitation attempts against the CrowdSec Network.
- 2026-09-17: CrowdSec First Seen. CrowdSec observes in-the-wild exploitation of CVE-2026-55229 for the first time.

## References

- https://github.com/gotenberg/gotenberg/releases/tag/v8.34.0
- https://github.com/gotenberg/gotenberg/security/advisories/GHSA-2mrg-35hw-x3x9
- https://github.com/gotenberg/gotenberg/commit/98fc40347885ad510a311b990a73397c6d4143db
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-55229.yaml

## Live exploitation data

The [Live Exploit Tracker page](https://tracker.crowdsec.net/cves/CVE-2026-55229) follows observed exploitation activity for CVE-2026-55229. [Request an API key](https://tracker.crowdsec.net/request-api-key) for full access to its exploitation timeline, attacking IP addresses and blocklists.