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Vulnerability record · CVE-2026-63756 · published 20 July 2026

CVE-2026-63756: Surrealdb race condition vulnerability

Surrealdb · Surrealdb

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.

9.2 CVSS 4.0 Critical EPSS 0.37% · top 71.9% CWE-362 · Race condition
9.2CVSS 4.0 base score
0.37%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
22 Jul 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/surrealdb/surrealdb/security/advisories/GHSA-4vgr-h27g-cf9p Vendor Advisory
https://www.vulncheck.com/advisories/surrealdb-before-privilege-escalation-via-rpc-session-race-condition Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.4CVE-2025-71392Surrealdb command injection vulnerabilitySurrealDB before 2.0.5, 2.1.x before 2.1.5, and 2.2.x before 2.2.2 fails to properly escape table and field names in the command-line export command.…EPSS 0.44%9.0CVE-2024-58366Delskayn rquickjs vulnerabilitySurrealDB before 1.1.1 contains a format string vulnerability in the rquickjs Exception::throw_type function when scripting is enabled. Attackers wit…EPSS 0.58%8.7CVE-2026-63760Surrealdb vulnerabilitySurrealDB before 3.1.0 fails to enforce the configured recursion depth limit in the value and JSON parser when processing nested braces, brackets, or…EPSS 0.52%8.7CVE-2026-63757Surrealdb missing authentication for critical function vulnerabilitySurrealDB versions before 3.1.0 contain a session hijacking vulnerability where the HTTP /rpc sessions method returns attached session UUIDs without …EPSS 0.54%8.7CVE-2026-63747Surrealdb vulnerabilitySurrealDB versions before 3.1.0 contain a denial of service vulnerability in the RPC use handler that panics when db is set without a namespace. Unau…EPSS 0.52%8.7CVE-2024-58362Surrealdb vulnerabilitySurrealDB before 1.5.5 (and 2.0.0-beta before 2.0.0-beta.3) accepts an arbitrary object in the signin and signup operations of the RPC API without re…EPSS 0.64%8.7CVE-2024-58368Surrealdb vulnerabilitySurrealDB versions before 1.1.0 fail to properly parse the ID, DB, and NS headers in HTTP REST API requests containing special characters. Unauthenti…EPSS 0.65%8.7CVE-2023-54366Surrealdb incorrect default permissions vulnerabilitySurrealDB before 1.0.1 sets default table permissions to FULL instead of NONE, allowing SELECT, CREATE, UPDATE, and DELETE operations on tables witho…EPSS 0.46%

Source: NIST National Vulnerability Database (record CVE-2026-63756), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.