CVE-2026-63756: 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 s
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.
Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-63756
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-637560.27% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 19% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-63756 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for SurrealDB
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- highCVE-2026-63763: SurrealDB before 2.5.0 and before 3.0.0-beta.3 contains a confused deputy privilege escalation…nvd · 2026-07-20
- mediumCVE-2026-63762: SurrealDB before v2.6.1 (and before v3.0.0-beta.3) contains a denial of service vulnerability …nvd · 2026-07-20
- mediumCVE-2026-63761: SurrealDB before 3.1.0 silently substitutes the ES384 algorithm when a JWT access method is co…nvd · 2026-07-20
- highCVE-2026-63760: SurrealDB before 3.1.0 fails to enforce the configured recursion depth limit in the value and …nvd · 2026-07-20
- mediumCVE-2026-63759: SurrealDB before 3.1.0 fails to enforce recursion depth limits in the type/kind parser when pr…nvd · 2026-07-20
- mediumCVE-2026-63758: SurrealDB versions before 3.1.0 contain an authorization bypass vulnerability in the KILL stat…nvd · 2026-07-20
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