High severity · published Jul 20, 2026
CVE-2026-63760
SurrealDB before 3.1.0 Denial of Service via JSON Parser
7.5
CVSS
0.5%
EPSS
No
On KEV
Description
SurrealDB before 3.1.0 fails to enforce the configured recursion depth limit in the value and JSON parser when processing nested braces, brackets, or parentheses. Unauthenticated attackers can send deeply nested JSON payloads to the WebSocket /rpc endpoint to exhaust server memory and crash the process.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 44% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SU
surrealdb · surrealdb
before 3.1.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-63760
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-63760
Vendor Advisory
https://github.com/surrealdb/surrealdb/security/advisories/GHSA-q729-696q-g9pq
Third Party Advisory
https://www.vulncheck.com/advisories/surrealdb-before-denial-of-service-via-json-parser
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