CVE-2026-55229Public exploitNetwork attack vector

SSRF and file disclosure via linked resources

Published Jul 10, 2026 · Updated Jul 10, 2026

SSRF in Gotenberg before 8.34.0 allows remote attackers to reach internal HTTP(S) services through LibreOffice conversion. The /forms/libreoffice/convert endpoint passes uploaded documents to LibreOffice without blocking linked content, so external URLs and absolute file paths are resolved during rendering. The route is reachable without authentication in the default configuration; HTTP(S) responses remain blind, while image-loadable local files can be embedded in the returned PDF.

CVSS severity7.5
High
EPSS probability1.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Gotenberg before 8.34.0 allows remote attackers to reach internal HTTP(S) services through LibreOffice conversion. The /forms/libreoffice/convert endpoint passes uploaded documents to LibreOffice without blocking linked content, so external URLs and absolute file paths are resolved during rendering. The route is reachable without authentication in the default configuration; HTTP(S) responses remain blind, while image-loadable local files can be embedded in the returned PDF.

The record

CVE
CVE-2026-55229
Published
Jul 10, 2026
Updated
Jul 10, 2026
Vendor
Gotenberg
Product
Gotenberg
Classifications
CWE-918, T1190, T1018
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 8.34.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Gotenberg · Gotenbergversion=< 8.34.0

Published CVSS scores

7.5GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application
T1018Remote System Discovery

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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