Server-Side Request Forgery Vulnerability in Gotenberg by Gotenberg
CVE-2026-126799

6.9MEDIUM

Key Information:

Vendor

Gotenberg

Status
Gotenberg
Vendor
CVE Published:
11 November 2026

What is CVE-2026-126799?

A server-side request forgery (SSRF) vulnerability exists in Gotenberg versions prior to 8.38.0, specifically within the IsPublicIP() function. This flaw allows unauthenticated attackers to manipulate zone identifiers, such as appending %25eth0 to blocked IPv6 addresses. This can enable attackers to bypass deny-list protections, consequently granting them unauthorized access to internal services and the ability to read responses from returned PDFs. It is crucial for users to upgrade to the latest version to mitigate potential exploitation.

Affected Version(s)

gotenberg 8.31.0 < 8.38.0

References

https://github.com/gotenberg/gotenberg/security/advisorie...
vendor-advisory
https://github.com/gotenberg/gotenberg/commit/8e850b1c932...
patch
https://github.com/gotenberg/gotenberg/releases/tag/v8.38.0
release-notes

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

euriconicacio
.