Medium severity · published Oct 12, 2026
CVE-2026-109339
SurrealDB 3.1.0 before 3.3.0 Memory Exhaustion via Surrealism Module Output Buffering
4.9
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 31% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SU
surrealdb · surrealdb
3.1.0 before 3.3.0 · source: vendor
SU
surrealism-runtime · surrealdb
0.3.0 before 0.6.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-109339
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-109339
vendor-advisory
https://github.com/surrealdb/surrealdb/security/advisories/GHSA-jj89-wvrw-c4gp
third-party-advisory
https://www.vulncheck.com/advisories/surrealdb-3.1.0-before-3.3.0-memory-exhaustion-via-surrealism-module-output-buffering
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