CVE-2026-3419

Fastify incorrectly accepts malformed Content-Type headers containing trailing characters after the subtype token, in violation of RFC 9110 §8.3.1https://httpwg.org/specs/rfc9110.htmlfield.content-type. For example, a request sent with Content-Type: application/json garbage passes validation and ...

@amedia/brick-mcp (>=0.0.0-vSNAPSHOT-20260217144000, <=1.0.0), @area15/ticket-component (0.1.0) +104 more potentially affected by CVE-2026-3419 via fastify (>=5.7.2, <=5.7.4)

fastify NPM version =5.7.2, =0.0.0-vSNAPSHOT-20260217144000, =0.5.2, =0.5.2, =0.5.2, =0.5.2, =0.2.11, =2.4.2-next.143, =2.4.2-next.143, =2.4.2-next.143, =2.4.2-next.143, =2.11.6, =5.1.19, =2.21.2, =2.21.2, =2.21.3 and more Source cves: CVE-2026-3419 Source advisory: MEND:CVE-2026-3419...

Fastify security vulnerabilities

Fastify is an open-source web framework developed by Fastify. There is a security vulnerability in Fastify, which stems from incorrectly accepting format-errors Content-Type headers. This could allow attackers to send requests that bypass validations and be processed by the server...

CVE-2026-3419: Incorrect Regular Expression

Fastify incorrectly accepts malformed Content-Type headers containing trailing characters after the subtype token, in violation of RFC 9110 §8.3.1https://httpwg.org/specs/rfc9110.htmlfield.content-type. For example, a request sent with Content-Type: application/json garbage passes validation and ...

PT-2026-23759

Name of the Vulnerable Software and Affected Versions Mercurius versions prior to 16.8.0 Description Mercurius does not properly enforce the configured queryDepth limit on GraphQL subscription queries received over WebSocket connections. The depth check functions as expected for HTTP queries and...

Fastify's Missing End Anchor in "subtypeNameReg" Allows Malformed Content-Types to Pass Validation

Description Fastify incorrectly accepts malformed Content-Type headers containing trailing characters after the subtype token, in violation of RFC 9110 §8.3.1. For example, a request sent with Content-Type: application/json garbage passes validation and is processed normally, rather than being...

@amedia/brick-mcp (>=0.0.0-vSNAPSHOT-20260217144000, <=1.0.0), @area15/ticket-component (0.1.0) +104 more potentially affected by CVE-2026-3419 via fastify (>=5.7.2, <=5.7.4)

fastify NPM version =5.7.2, =0.0.0-vSNAPSHOT-20260217144000, =0.5.2, =0.5.2, =0.5.2, =0.5.2, =0.2.11, =2.4.2-next.143, =2.4.2-next.143, =2.4.2-next.143, =2.4.2-next.143, =2.11.6, =5.1.19, =2.21.2, =2.21.2, =2.21.3 and more Source cves: CVE-2026-3419 Source advisory: OSV:GHSA-573F-X89G-HQP9...

GHSA-573F-X89G-HQP9 Fastify's Missing End Anchor in "subtypeNameReg" Allows Malformed Content-Types to Pass Validation

Description Fastify incorrectly accepts malformed Content-Type headers containing trailing characters after the subtype token, in violation of RFC 9110 §8.3.1. For example, a request sent with Content-Type: application/json garbage passes validation and is processed normally, rather than being...

@amedia/brick-mcp (>=0.0.0-vSNAPSHOT-20260217144000, <=1.0.0), @area15/ticket-component (0.1.0) +104 more potentially affected by CVE-2026-3419 via fastify (>=5.7.2, <=5.7.4)

fastify NPM version =5.7.2, =0.0.0-vSNAPSHOT-20260217144000, =0.5.2, =0.5.2, =0.5.2, =0.5.2, =0.2.11, =2.4.2-next.143, =2.4.2-next.143, =2.4.2-next.143, =2.4.2-next.143, =2.11.6, =5.1.19, =2.21.2, =2.21.2, =2.21.3 and more Source cves: CVE-2026-3419 Source advisory: GHSA-573F-X89G-HQP9...

@amedia/brick-mcp (>=0.0.0-vSNAPSHOT-20260217144000, <=1.0.0), @area15/ticket-component (0.1.0) +104 more potentially affected by CVE-2026-3419 via fastify (>=5.7.2, <=5.7.4)

fastify NPM version =5.7.2, =0.0.0-vSNAPSHOT-20260217144000, =0.5.2, =0.5.2, =0.5.2, =0.5.2, =0.2.11, =2.4.2-next.143, =2.4.2-next.143, =2.4.2-next.143, =2.4.2-next.143, =2.11.6, =5.1.19, =2.21.2, =2.21.2, =2.21.3 and more Source cves: CVE-2026-3419 Source advisory: SNYK:JS-FASTIFY-15428269...

EUVD-2025-208313

Mercurius: Incorrect Content-Type parsing can lead to CSRF attack...

Cross-site Request Forgery (CSRF)

Overview mercurius is a GraphQL adapter for Fastify Affected versions of this package are vulnerable to Cross-site Request Forgery CSRF due to incorrect parsing of the Content-Type header. An attacker can perform unauthorized actions on behalf of an authenticated user by sending specially crafted...

GHSA-V66J-6WWF-JC57 Mercurius: Incorrect Content-Type parsing can lead to CSRF attack

Summary A Cross-Site Request Forgery CSRF vulnerability was identified in Mercurius versions 16. 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...

CVE-2025-64166

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...

CVE-2025-64166 Mercurius: Incorrect Content-Type parsing can lead to CSRF attack

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...

CVE-2025-64166

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...

CVE-2025-64166

Mercurius (GraphQL adapter for Fastify) has a CSRF flaw prior to v16.4.0 caused by incorrect parsing of Content-Type headers. Requests with Content-Type like application/x-www-form-urlencoded, multipart/form-data, or text/plain could be misinterpreted as application/json, bypassing fetch() prefli...

PT-2026-23452

Name of the Vulnerable Software and Affected Versions Mercurius versions prior to 16.4.0 Description Mercurius, a GraphQL adapter for Fastify, was found to have a cross-site request forgery CSRF issue. The problem stems from the incorrect parsing of the Content-Type header in requests...

CVE-2025-64166: Cross-Site Request Forgery (CSRF)

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...

GHSA-R4WM-X892-VJMX Nest has a Fastify URL Encoding Middleware Bypass

Impact What kind of vulnerability is it? Who is impacted? A NestJS application using @nestjs/platform-fastify can allow bypass of any middleware when Fastify path-normalization options e.g., ignoreTrailingSlash, ignoreDuplicateSlashes, useSemicolonDelimiter are enabled. In affected route-scoped...