CVE-2026-63756

High

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.

SeverityHigh

CVSS8.1

Exploit probability—

ProductSurrealdb

PublishedJul 20, 2026

First seenJul 20, 2026

Weakness typeCWE-362Race condition

How to fix

Update

surrealdb surrealdb3.1.0 or later

Vendor advisories

github.com/surrealdb/surrealdb/security/advisories/GHSA-4vgr-h27g-cf9p

Affected products

Product	Affected versions	Fixed in
surrealdb surrealdb	v < 3.1.0	3.1.0

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