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CVE-2026-55229— Gotenberg: SSRF via LibreOffice document processing

Quick assessment

Affected
gotenberg gotenberg
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Gotenberg是Gotenberg团队开源的一个开发人员友好的 API。用于将多种文档格式转换为 PDF 文件。 Gotenberg 8.34.0之前版本存在服务端请求伪造漏洞，该漏洞源于/forms/libreoffice/convert端点允许特制文档在转换过程中自动检索外部HTTP(S)资源和本地文件资源，可能导致盲目服务端请求伪造和有限本地文件泄露。

CVSS 7.5 · High EPSS 1.51% · P73

Public Exploits 1

Nuclei · 1 CVE-2026-55229.yaml [template]

Affected Version Matrix 1

VendorProduct Version RangeStatus
gotenberg gotenberg < 8.34.0 affected
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I. Basic Information for CVE-2026-55229

Vulnerability Information
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Vulnerability Title
Gotenberg: SSRF via LibreOffice document processing
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
Gotenberg 服务端请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Gotenberg是Gotenberg团队开源的一个开发人员友好的 API。用于将多种文档格式转换为 PDF 文件。 Gotenberg 8.34.0之前版本存在服务端请求伪造漏洞，该漏洞源于/forms/libreoffice/convert端点允许特制文档在转换过程中自动检索外部HTTP(S)资源和本地文件资源，可能导致盲目服务端请求伪造和有限本地文件泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
gotenberg gotenberg < 8.34.0 -

II. Public POCs for CVE-2026-55229

# POC Description Source Link Shenlong Link
1 Gotenberg before 8.34.0 allows SSRF and limited local file disclosure via its /forms/libreoffice/convert endpoint. When LibreOffice is used to convert user-uploaded DOCX files, external relationships within the document (such as a:blip r:link TargetMode="External") can instruct LibreOffice to fetch local resources (file://) or remote resources (http/https), which are then included as images in the generated PDF. This can disclose the contents of local files LibreOffice can open as images, or allow outbound requests to attacker-controlled endpoints. Version 8.34.0 disables resolution of external resources during document conversion to mitigate the vulnerability. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-55229.yaml POC Details
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III. Intelligence Information for CVE-2026-55229

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Patches & Fixes for CVE-2026-55229 (1)

Vendor Advisories for CVE-2026-55229 (1)

Vendor Pages for CVE-2026-55229 (1)

IV. Related Vulnerabilities

Same product: gotenberg
Same vendor: gotenberg
Same weakness: CWE-918

V. Comments for CVE-2026-55229

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