Memory Exhaustion Vulnerability in SurrealDB by Surrealism Modules
CVE-2026-109339

6.9MEDIUM

Key Information:

Vendor

Surrealdb

Status
Surrealdb
Surrealism-runtime
Vendor
CVE Published:
12 October 2026

What is CVE-2026-109339?

The vulnerability in SurrealDB allows malicious Surrealism modules to exhaust server memory by unboundedly buffering their output, bypassing configured memory limits. An attacker could exploit this by running a module with output that omits newlines, leading to a denial of service that impacts all namespaces and databases on the server. Upgrading to versions 3.3.0 and later is strongly recommended to mitigate this risk.

Affected Version(s)

surrealdb 3.1.0 < 3.3.0

surrealism-runtime 0.3.0 < 0.6.0

surrealdb 3.3.0

References

https://github.com/surrealdb/surrealdb/security/advisorie...
vendor-advisory
https://www.vulncheck.com/advisories/surrealdb-3.1.0-befo...
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

gigioneggiando
.