Vulnerability in Surrealdb
CVE-2026-121423
SurrealDB before 3.3.0 contains an unbounded recursion vulnerability that allows authenticated users to abort the surreald process by triggering stack overflow on deeply nested values. Attackers can repeatedly run UPDATE statements wrapping a stored array in itself, then SELECT or EXPORT it, causing persistent denial of service for all tenants.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/surrealdb/surrealdb/security/advisories/GHSA-rpmq-gq3f-h6jg (vendor-advisory)
- www.vulncheck.com/advisories/surrealdb-before-3.3.0-dos-via-unbounded-recursion… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-121423?
- CVE-2026-121423 is a medium-severity vulnerability in Surrealdb, classified under Uncontrolled Recursion. CVSS score: 6.5/10. Published 2026-11-03.
- How severe is CVE-2026-121423?
- Medium severity. CVSS v3 base score is 6.5 out of 10.