---
id: CVE-2026-109339
title: >-
  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
summary: >-
  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 mal…
severity: medium
cvss: 4.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-770
published: '2026-10-12'
updated: '2026-10-12'
sourceUpdated: '2026-10-12T17:17:30.233'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-109339'
references:
  - url: >-
      https://github.com/surrealdb/surrealdb/security/advisories/GHSA-jj89-wvrw-c4gp
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/surrealdb-3.1.0-before-3.3.0-memory-exhaustion-via-surrealism-module-output-buffering
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-12T18:00:08.207Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.