CVE-2026-63756
highpriority · track · 0EPSS 0.004 · 31 %ileEUUSEPSS · scored 2026-10-28
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
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.2–9.2
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (6)
External citations — patches, advisories, analysis.
- https://github.com/surrealdb/surrealdb/security/advisories/GHSA-4vgr-h27g-cf9pcnnvd
- https://www.vulncheck.com/advisories/surrealdb-before-privilege-escalation-via-rpc-session-race-conditioncnnvd
- https://github.com/surrealdb/surrealdb/security/advisories/GHSA-4vgr-h27g-cf9penisa_euvd
- https://www.vulncheck.com/advisories/surrealdb-before-privilege-escalation-via-rpc-session-race-conditionenisa_euvd
- https://github.com/surrealdb/surrealdb/security/advisories/GHSA-4vgr-h27g-cf9pVendor Advisorynvd
- https://www.vulncheck.com/advisories/surrealdb-before-privilege-escalation-via-rpc-session-race-conditionThird Party Advisorynvd
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