CVE-2026-109338GHSA-84w9-87hm-mxqx
SurrealDB before 3.3.0 Denial of Service via Headers Non-ASCII Values
surrealdb surrealdb
CVSS
7.1HighExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.31%Chance of exploitation activity in the next 30 days, higher than 22% of CVEs. Scored 23 Oct 2026FIRST EPSS
What fixes it
- 3.3.0surrealdbCVE List
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
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.
Text from CVE List
Affected versions 2
- surrealdbaffected: all versions before 3.3.0CVE List
- surrealdbunaffected: 3.3.0CVE List