Vulnerability · Published Nov 3, 2026 · Assigned by VulnCheck

CVE-2026-121421SurrealDB 3.1.0 before 3.3.0 SSRF via Port-Specific --deny-net Host Aliasing Bypass

Medium 4.3

In plain English

A medium-severity server-side request forgery in surrealdb from surrealdb. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.3%top 73.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
surrealdb	surrealdb	3.1.0 – before 3.3.0

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

References

GitHub Security Advisory (GHSA-mhv5-88p6-w4c3) vendor-advisory
Patch Commit patch
VulnCheck Advisory: SurrealDB 3.1.0 before 3.3.0 SSRF via Port-Specific --deny-net Host Aliasing Bypass third-party-advisory