CVE-2026-109339 SurrealDB 3.1.0 before 3.3.0 Memory Exhaustion via Surrealism Module Output Buffering
An attacker can crash the SurrealDB server by installing a malicious module that exhausts memory via unbounded output buffering.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-109339?
CVE-2026-109339 is a medium-severity denial of service vulnerability in surrealdb, published on 12 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official 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.
Weakness: CWE-770
Which versions are affected by CVE-2026-109339?
How do I fix CVE-2026-109339?
No fix has been published for CVE-2026-109339 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-109339 being exploited?
There is no known exploitation of CVE-2026-109339 in the wild and no public exploit code.
Sources
Also known as GHSA-rj2f-8wx8-hgm5.