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CVE-2026-109338 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

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.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CNA: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/surrealdb/surrealdb/security/advisories/GHSA-84w9-87hm-mxqx	[email protected]	AdvisoryRemedyVendor
https://www.vulncheck.com/advisories/surrealdb-before-3.3.0-denial-of-service-via-headers-non-ascii-values	[email protected]	Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-248	Uncaught Exception	[email protected]

Affected Products

Product	Versions
SurrealDB	< 3.3.0 (semver)
CPE No CPEs found in CPE dictionary for this product. Remediation Upgrade: 3.3.0moderate effort Workaround:low effort Disable embedded scripting, which is the default. If you need scripting, limit who can write scripts: keep guest access disabled, and use --deny-arbitrary-query (where available) for user groups that should not run their own queries. Where stored scripts call fetch(), restrict --allow-net to trusted endpoints, and avoid reading response headers from untrusted endpoints.

Product

Versions

SurrealDB

< 3.3.0 (semver)

CPE

No CPEs found in CPE dictionary for this product.

Remediation

Upgrade: 3.3.0moderate effort
Workaround:low effort
Disable embedded scripting, which is the default. If you need scripting, limit who can write scripts: keep guest access disabled, and use --deny-arbitrary-query (where available) for user groups that should not run their own queries. Where stored scripts call fetch(), restrict --allow-net to trusted endpoints, and avoid reading response headers from untrusted endpoints.

Change History

2 change records found show changes

Date	Action	Recorded By
Oct 13, 2026	CVE Modified	CISA-ADP
Oct 12, 2026	New CVE Received	[email protected]