CVE-2026-55229
HighPublic exploitGotenberg: SSRF via LibreOffice document processing
Published Jun 18, 2026 · Updated Aug 12, 2026 · Also known as GHSA-2mrg-35hw-x3x9, GO-2026-5060
Key Facts
Patch immediately- CVE-2026-55229 is a high-severity vulnerability (CVSS 7.5 v3.1) affecting github.com/gotenberg/gotenberg/v7 (go), github.com/gotenberg/gotenberg/v8 (go), gotenberg.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 1.5% probability of exploitation in the next 30 days.
- Fixed versions are available, including github.com/gotenberg/gotenberg/v8 8.34.0.
- Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS (30-day exploit likelihood)
1.5%
Higher than 74.0% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2026-55229 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
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.
Affected Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| github.com/gotenberg/gotenberg/v7go | See advisory | n/a |
| github.com/gotenberg/gotenberg/v8go | See advisory | 8.34.0 |
| gotenberg | >= < 8.34.0 | n/a |
Patched Releases
github.com/gotenberg/gotenberg/v8
8.34.0
Timeline
Publicly disclosed
Jun 18, 2026
Last updated
Aug 12, 2026
Weakness Type
- CWE-918 Server-Side Request Forgery (SSRF)
References
- advisoryGHSA advisory
- advisoryhttps://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55229.json
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2026-55229
- articlehttps://github.com/gotenberg/gotenberg/security/advisories/GHSA-2mrg-35hw-x3x9
- otherhttps://github.com/gotenberg/gotenberg
FAQ
Common Questions.
Gotenberg is a Docker-powered stateless API for PDF files.
Affected: github.com/gotenberg/gotenberg/v7 (go); github.com/gotenberg/gotenberg/v8 (go); gotenberg versions >= < 8.34.0. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including github.com/gotenberg/gotenberg/v8 8.34.0.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
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