CVE-2026-45741 is a high-severity server-side request forgery (SSRF) vulnerability in github.com/gotenberg/gotenberg/v8 (go), affecting versions <= 8.32.0. No fixed version is listed yet.
Summary IsPublicIP in pkg/gotenberg/outbound.go incorrectly classifies IPv6 6to4 / NAT64 / deprecated site-local addresses as public IPs, allowing an unauthenticated attacker to reach internal destinations (e.g., cloud metadata services at 169.254.169.254) via a single crafted DNS AAAA record. This is a variant of CVE-2026-44430 (modelcontextprotocol/registry). Details IsPublicIP uses Go stdlib helpers (IsLoopback, IsPrivate, IsLinkLocalUnicast, etc.) to block internal IPs. However, these helpers do not recognize IPv6 prefixes that embed IPv4 addresses: | Prefix | RFC | Tunnels to | |--------|-----|-----------| | 2002::/16 | RFC 3056 (6to4) | IPv4 in bits 16-47 | | 64:ff9b::/96 | RFC 6052 (NAT64 well-known) | IPv4 in low 32 bits | | 64:ff9b:1::/48 | RFC 8215 (NAT64 local-use) | IPv4 in low 32 bits | | fec0::/10 | RFC 3879 (deprecated site-local) | internal routing | addr.Unmap() only handles ::ffff:0:0/96 (IPv4-mapped) and has no effect on these prefixes. On dual-stack or NAT64-enabled cloud hosts, the OS kernel transparently routes these addresses to their embedded internal IPv4 destinations. Vulnerable code (pkg/gotenberg/outbound.go L53-69, commit 93d0103): PoC Expected output: IsPublicIP(2002:a9fe:a9fe::) = true, the function returns true for 3 addresses that wrap 169.254.169.254 (AWS IMDS). Full test file available via GHSA private comment on request. Impact An unauthenticated attacker controlling a DNS AAAA record can tunnel gotenberg's outbound HTTP client to AWS/GCP/Azure IMDS (169.254.169.254), leaking IAM credentials. The Chromium URL convert route returns the full response as a PDF (full-read SSRF). Affects all deployments with WithDenyPrivateIPs(true) on dual-stack or NAT64-enabled hosts. Suggested Fix Add explicit prefix checks after addr.Unmap():
Untrusted input controls the target URL of a server-initiated request, which may reach internal services not otherwise accessible from outside. Typical impact: access to internal metadata services, internal APIs, or cloud credentials.
CVE-2026-45741 has a CVSS score of 7.5 (High). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment.
No fixed version is listed yet, so configuration controls and monitoring matter more in the interim.
go
github.com/gotenberg/gotenberg/v8 (<= 8.32.0)Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
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No fixed version is listed for CVE-2026-45741 yet.
In the interim: Validate and restrict destination URLs against an allowlist. Block requests to private IP ranges and cloud metadata endpoints.
Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
CVE-2026-45741 is a high-severity server-side request forgery (SSRF) vulnerability in github.com/gotenberg/gotenberg/v8 (go), affecting versions <= 8.32.0. No fixed version is listed yet. Untrusted input controls the target URL of a server-initiated request, which may reach internal services not otherwise accessible from outside.
CVE-2026-45741 has a CVSS score of 7.5 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
github.com/gotenberg/gotenberg/v8 (go) versions <= 8.32.0 is affected.
No fixed version is listed for CVE-2026-45741 yet. Monitor the advisory for updates and apply mitigations in the interim.
Whether CVE-2026-45741 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
No fixed version is listed yet. In the interim: Validate and restrict destination URLs against an allowlist. Block requests to private IP ranges and cloud metadata endpoints.