CVE-2026-121421

Description

SurrealDB 3.1.0 before 3.3.0 contains a server-side request forgery vulnerability in network-capability matching because port-specific --deny-net rules (HOST:PORT or IP:PORT) match only a literal host string, while the resolved-IP check discards the port. Authenticated users can call http::* functions with a hostname resolving to a denied IP, or the IP of a denied hostname, to reach blocked internal services.

References

• https://github.com/surrealdb/surrealdb/commit/9d9a5b0693e499e0d030cac6b618062ec02cd2bc
• https://github.com/surrealdb/surrealdb/security/advisories/GHSA-mhv5-88p6-w4c3
• https://www.vulncheck.com/advisories/surrealdb-3.1.0-before-3.3.0-ssrf-via-port-specific-deny-net-host-aliasing-bypass
• https://github.com/surrealdb/surrealdb/security/advisories/GHSA-mhv5-88p6-w4c3