CVEvulnerability
CVE-2025-64166
5.4 MEDIUM
Official page ↗
- Status
- Analyzed
- Published
- 2026-03-05
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 5.4 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
- Weaknesses
- CWE-352
Description
Mercurius is a GraphQL adapter for Fastify. Prior to version 16.4.0, a cross-site request forgery (CSRF) vulnerability was identified. The issue arises from incorrect parsing of the Content-Type header in requests. Specifically, requests with Content-Type values such as application/x-www-form-urlencoded, multipart/form-data, or text/plain could be misinterpreted as application/json. This misinterpretation bypasses the preflight checks performed by the fetch() API, potentially allowing unauthorized actions to be performed on behalf of an authenticated user. This issue has been patched in version 16.4.0.
Affected configurations
• mercurius project mercurius (< 16.4.0)
Related
Weakness · CWE (1)
- CWE-352 Cross-Site Request Forgery weakness
References
- https://github.com/mercurius-js/mercurius/commit/962d402ec7a92342f4a1b7f5f04af01776838c3c Patch
- https://github.com/mercurius-js/mercurius/pull/1187 Issue Tracking, Patch
- https://github.com/mercurius-js/mercurius/security/advisories/GHSA-v66j-6wwf-jc57 Exploit, Patch, Vendor Advisory
- https://github.com/mercurius-js/mercurius/security/advisories/GHSA-v66j-6wwf-jc57 Exploit, Patch, Vendor Advisory