Resource exhaustion in Surrealdb
CVE-2026-109339
SurrealDB 3.1.0 before 3.3.0 lets Surrealism modules exhaust server memory because module stdout/stderr lines are buffered unbounded in host memory, bypassing the configured module memory limit. An attacker can run an Owner-installed malicious module that writes output without newlines, crashing the server and denying service to all namespaces and databases.
Published .
CVSS v3 metric
CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/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-jj89-wvrw-c4gp (vendor-advisory)
- www.vulncheck.com/advisories/surrealdb-3.1.0-before-3.3.0-memory-exhaustion-via… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-109339?
- CVE-2026-109339 is a medium-severity vulnerability in Surrealdb, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 4.9/10. Published 2026-10-12.
- How severe is CVE-2026-109339?
- Medium severity. CVSS v3 base score is 4.9 out of 10.