CVE-2026-63737: SurrealDB before 3.1.5 Denial of Service via deep operator chains

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-20 · updated 2026-07-22
Weakness: CWE-674

Description

SurrealDB versions before 3.1.5 contain a denial of service vulnerability where authenticated users can crash the server with queries containing long chains of operators. Attackers can submit queries with tens of thousands of chained operators that create unbounded expression trees, causing stack overflow during query processing and aborting the entire process.

Affected products

surrealdb: from 3.0.0 before 3.1.5 — fixed in 3.1.5

How to fix

Upgrade to a fixed version: surrealdb 3.1.5. Check the vendor advisory for mitigations.

References

https://github.com/surrealdb/surrealdb/security/advisories/GHSA-jv2j-mqmw-xvv5
https://www.vulncheck.com/advisories/surrealdb-before-denial-of-service-via-deep-operator-chains

Get alerted when CVE-2026-63737 or the next vulnerability affects your stack