CVE-2026-109339

Medium

Description

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.

SeverityMedium

CVSS4.9

Exploit probability—

ProductSurrealdb

PublishedOct 12, 2026

First seenOct 12, 2026

Weakness typeCWE-770Allocation of resources without limits

How to fix

Update

surrealdb surrealdb3.3.0 or later
surrealdb surrealism-runtime0.6.0 or later

Vendor advisories

github.com/surrealdb/surrealdb/security/advisories/GHSA-jj89-wvrw-c4gp

Affected products

Product	Affected versions	Fixed in
surrealdb surrealdb	3.1.0 ≤ v < 3.3.0	3.3.0
surrealdb surrealism-runtime	0.3.0 ≤ v < 0.6.0	0.6.0

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