Vulnerability · Published Oct 12, 2026 · Assigned by VulnCheck
CVE-2026-109338SurrealDB before 3.3.0 Denial of Service via Headers Non-ASCII Values
Medium 6.5
In plain English
A medium-severity security flaw in surrealdb from surrealdb. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities).
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.3%top 76.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
Weakness: CWE-248 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
References
- GitHub Security Advisory (GHSA-84w9-87hm-mxqx) vendor-advisory
- VulnCheck Advisory: SurrealDB before 3.3.0 Denial of Service via Headers Non-ASCII Values third-party-advisory