CVE-2026-55229 Gotenberg: SSRF via LibreOffice document processing
Attacker can trigger blind SSRF and limited local file disclosure via crafted documents in Gotenberg's LibreOffice conversion endpoint.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-55229?
CVE-2026-55229 is a high-severity server-side request forgery vulnerability in gotenberg, published on 10 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-918
Which versions are affected by CVE-2026-55229?
4 open source packages ship an affected version, including github.com/gotenberg/gotenberg/v8 and github.com/gotenberg/gotenberg/v7.
| Package | Affected | Fixed in |
|---|---|---|
github.com/gotenberg/gotenberg/v8 Go | All versions | 8.34.0 |
github.com/gotenberg/gotenberg/v8 Go | All versions | 8.34.0 |
github.com/gotenberg/gotenberg/v8 Go | All versions | 8.34.0 |
github.com/gotenberg/gotenberg/v7 Go | All versions | None |
How do I fix CVE-2026-55229?
Upgrade github.com/gotenberg/gotenberg/v8 to 8.34.0 or later.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-55229 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-55229 exists.
Public exploit code: 1 Nuclei template.
Sources
Also known as GHSA-2mrg-35hw-x3x9, GO-2026-5060.