High severity · published Jul 20, 2026
CVE-2026-63747
SurrealDB before 3.1.0 Denial of Service via malformed RPC use
7.5
CVSS
0.5%
EPSS
No
On KEV
Description
SurrealDB versions before 3.1.0 contain a denial of service vulnerability in the RPC use handler that panics when db is set without a namespace. Unauthenticated attackers can send a malformed WebSocket message to the /rpc endpoint to crash the server 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-2026-63747
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-63747
Mitigation
https://github.com/surrealdb/surrealdb/security/advisories/GHSA-wjjj-24cx-f28g
Third Party Advisory
https://www.vulncheck.com/advisories/surrealdb-before-denial-of-service-via-malformed-rpc-use
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