by Kastro
Paper/Archive/CVE-2026-63756

CVE-2026-63756

surrealdb surrealdb — SurrealDB before 3.1.0 Privilege Escalation via RPC Session Race Condition

EPSS 0.4%CVSS 9.2
critical.is priorityof 100
34
CVSS 9.2 (CNA)9.2 / 10 × 3027.6Not in CISA KEV+300.0EPSS percentile 30.7.307 × 206.1No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
surrealdb< 3.1.03.1.0CNA

Scores by source

VulnCheck (CNA)9.2CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
VulnCheck (CNA)8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

advisorygithub.com/surrealdb/surrealdb/security/advisories/GHSA-4vgr-h27g-cf9pwriteupvulncheck.com/advisories/surrealdb-before-privilege-escalation-via-rpc-session-race-condition