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NVD description
Gotenberg is a Docker-powered stateless API for PDF files. In 8.32.0 and earlier, the IsPublicIP function in pkg/gotenberg/outbound.go does not reject the 2002::/16 6to4 prefix, the 64:ff9b::/96 and 64:ff9b:1::/48 NAT64 prefixes, the fec0::/10 deprecated site-local prefix, Teredo, and other transition prefixes that can embed or route to non-public IPv4 destinations. The addr.Unmap operation only handles IPv4-mapped IPv6 addresses, so a crafted DNS AAAA record can cause the outbound HTTP client to treat an address wrapping an internal destination such as 169.254.169.254 as public. An unauthenticated attacker can use a conversion route with WithDenyPrivateIPs enabled to reach cloud metadata services, and the Chromium URL conversion route can return the internal response as a PDF, potentially exposing cloud credentials. Exploitation requires a deployment whose host routes the relevant IPv6 prefix, such as a dual-stack or NAT64-enabled environment. This issue is fixed in version 8.33.0.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
AVAILABLE
Momentum
NONE
🚨 HIGH: CVE-2026-45741 (CVSS 7.5) - Gotenberg API ≤8.32.0 vulnerable to SSRF via IPv6 bypass. Attackers can reach cloud metadata services, potentially exposing credentials. Patch to 8.33.0 immediately. #CVE #PatchNow #ThreatIntel https://t.co/Of8TQsRYlO
Post summary
The tweet announces a high‑severity SSRF vulnerability in Gotenberg API versions ≤8.32.0, provides technical details and immediately recommends upgrading to 8.33.0.