CVE-2026-109339

6.9 mediumEPSS 0.4%

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.

CVSS 4.0: 6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS 3.1: 4.9CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.4% chance of exploitation in the next 30 days; higher than 31% of CVEs (scores of 2026-10-25)
CWE: CWE-770
Published: 2026-10-12
Modified: 2026-10-16
Record from: the NVD, synced 2026-10-19

References

https://github.com/surrealdb/surrealdb/security/advisories/GHSA-jj89-wvrw-c4gp
https://www.vulncheck.com/advisories/surrealdb-3.1.0-before-3.3.0-memory-exhaustion-via-surrealism-module-output-buffering

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