CVE-2026-63756

highCVSS 8.1covered by 1 sourcefirst seen 2026-07-20

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.

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Exploitation outlook

Low exploitation risk0.27% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 19% of all EPSS-scored CVEs.

Advisory coverage (1)

highCVE-2026-63756: SurrealDB versions before 3.1.0 contain a time-of-check/time-of-use race condition in the HTTP…nvd · 2026-07-20

External references

NVD record for CVE-2026-63756

CVE.org record

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