Docker-Powered API for PDF Files Vulnerability in Gotenberg
CVE-2026-42592

5.3MEDIUM

Key Information:

Vendor

Gotenberg

Status
Gotenberg
Vendor
CVE Published:
14 May 2026

What is CVE-2026-42592?

Gotenberg, a stateless API for PDF file processing, exhibits a vulnerability related to improper DNS resolution before version 8.32.0. The flaw arises when FilterOutboundURL resolves hostnames, checking against a private-address deny-list but failing to securely handle IP addresses. An attacker can exploit this weakness by controlling the DNS for a hostname with a short TTL. This allows the return of a public IP address on the first query, followed by a private IP on subsequent queries. Consequently, when Chromium attempts to connect, it may reach an internal address controlled by the attacker, leading to unauthorized access to private services. This issue has been addressed in version 8.32.0.

Affected Version(s)

gotenberg < 8.32.0

References

https://github.com/gotenberg/gotenberg/security/advisorie...
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CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.