Vulnerability in Surrealdb
CVE-2026-109338
SurrealDB before 3.3.0 contains a denial of service vulnerability that allows query-capable users to crash the server by reading non-ASCII header values in embedded JavaScript. Attackers with scripting enabled can read such values via Headers get(), entries(), values(), or getSetCookie(), or return them from fetch() endpoints, aborting the server process.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
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
Weakness classification (CWE)
References
- github.com/surrealdb/surrealdb/security/advisories/GHSA-84w9-87hm-mxqx (vendor-advisory)
- www.vulncheck.com/advisories/surrealdb-before-3.3.0-denial-of-service-via-heade… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-109338?
- CVE-2026-109338 is a medium-severity vulnerability in Surrealdb, classified under CWE-248. CVSS score: 6.5/10. Published 2026-10-12.
- How severe is CVE-2026-109338?
- Medium severity. CVSS v3 base score is 6.5 out of 10.