High severity · published Jul 20, 2026
CVE-2026-63756
SurrealDB before 3.1.0 Privilege Escalation via RPC Session Race Condition
8.1
CVSS
0.4%
EPSS
No
On KEV
Description
SurrealDB versions before 3.1.0 contain a time-of-check/time-of-use race condition in the HTTP /rpc endpoint that allows unauthenticated requests to inherit authenticated session state. Unauthenticated attackers can send concurrent requests to the /rpc endpoint while legitimate authenticated traffic is active to execute operations with hijacked user privileges.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
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
before 3.1.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-63756
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-63756
Vendor Advisory
https://github.com/surrealdb/surrealdb/security/advisories/GHSA-4vgr-h27g-cf9p
Third Party Advisory
https://www.vulncheck.com/advisories/surrealdb-before-privilege-escalation-via-rpc-session-race-condition
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