Medium severity · published Jul 20, 2026
CVE-2026-63737
SurrealDB before 3.1.5 Denial of Service via deep operator chains
6.5
CVSS
0.5%
EPSS
No
On KEV
Description
SurrealDB versions before 3.1.5 contain a denial of service vulnerability where authenticated users can crash the server with queries containing long chains of operators. Attackers can submit queries with tens of thousands of chained operators that create unbounded expression trees, causing stack overflow during query processing and aborting the entire process.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 42% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SU
surrealdb · surrealdb
3.0.0 before 3.1.5 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-63737
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-63737
Vendor Advisory
https://github.com/surrealdb/surrealdb/security/advisories/GHSA-jv2j-mqmw-xvv5
Third Party Advisory
https://www.vulncheck.com/advisories/surrealdb-before-denial-of-service-via-deep-operator-chains
More from surrealdb
8.8
CVE-2026-63763
SurrealDB before 2.5.0 Privilege Escalation via Future Fields
8.8
CVE-2026-63757
SurrealDB before 3.1.0 Session Hijacking via /rpc sessions
8.8
CVE-2025-71390
SurrealDB before 2.3.6 deny-net Bypass via DNS Resolution
8.8
CVE-2024-58366
SurrealDB before 1.1.1 Format String via Scripting Functions
8.8
CVE-2024-58362
SurrealDB before 1.5.5 Query Injection via RPC API