What is CVE-2026-109342?

CVE-2026-109342 is a medium-severity vulnerability in Surrealdb, classified under Missing Authentication for Critical Function. CVSS score: 5.4/10. Published 2026-10-12.

How severe is CVE-2026-109342?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Auth bypass in Surrealdb

CVE-2026-109342

SurrealDB from 3.0.0 before 3.3.0 contains a missing authentication vulnerability in the revoke RPC method that allows low-privileged or unauthenticated callers to invalidate other users' refresh tokens without proof of possession. Attackers can obtain grant identifiers via ACCESS SHOW ALL with VIEWER permission or leaked tokens, then permanently revoke refresh tokens to force re-authentication.

Vulnerability class: Broken Authentication

Published 2026-10-12 · last modified 2026-10-12.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Surrealdb

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

github.com/surrealdb/surrealdb/security/advisories/GHSA-2jc3-58q7-mm2j (vendor-advisory)
www.vulncheck.com/advisories/surrealdb-3.0.0-before-3.3.0-missing-authenticatio… (third-party-advisory)

Frequently asked questions

What is CVE-2026-109342?: CVE-2026-109342 is a medium-severity vulnerability in Surrealdb, classified under Missing Authentication for Critical Function. CVSS score: 5.4/10. Published 2026-10-12.
How severe is CVE-2026-109342?: Medium severity. CVSS v3 base score is 5.4 out of 10.