CVE-2026-33804

@fastify/middie versions 9.3.1 and earlier are vulnerable to middleware bypass when the deprecated Fastify ignoreDuplicateSlashes option is enabled. The middleware path matching logic does not account for duplicate slash normalization performed by Fastify's router, allowing requests with duplicat...

CVE-2026-33808

Impact@fastify/express v4.0.4 and earlier fails to normalize URLs before passing them to Express middleware when Fastify router normalization options are enabled. This allows complete bypass of path-scoped authentication middleware via duplicate slashes when ignoreDuplicateSlashes is enabled, or...

Improper Authorization

@fastify/express is vulnerable to Improper Authorization. The vulnerability is due to inconsistent URL normalization between Fastify and Express middleware, which allows an unauthenticated attacker to manipulate URL paths using duplicate slashes or semicolon delimiters to bypass path-based...

GHSA-QXHC-WX3P-2WMG @fastify/accepts-serializer Vulnerable to Denial of Service via Unbounded Accept Header Cache Growth

Impact @fastify/accepts-serializer cached serializer-selection results keyed by the request Accept header without a size limit or eviction policy. A remote unauthenticated client could send many distinct but matching Accept header variants to make the cache grow unbounded. Under sustained load,...

@fastify/accepts-serializer Vulnerable to Denial of Service via Unbounded Accept Header Cache Growth

Impact @fastify/accepts-serializer cached serializer-selection results keyed by the request Accept header without a size limit or eviction policy. A remote unauthenticated client could send many distinct but matching Accept header variants to make the cache grow unbounded. Under sustained load,...

CVE-2026-41690

18next-http-middleware is a middleware to be used with Node.js web frameworks like express or Fastify and also for Deno. Versions prior to 3.9.3 allow an unauthenticated HTTP client to pollute Object.prototype in the Node.js process hosting the middleware, via two unvalidated entry points that...

Allocation of Resources Without Limits or Throttling

Overview @fastify/accepts-serializer is a Serializer according to the accept header Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the unbounded caching of serializer-selection results keyed by the Accept header. An attacker can exhaus...

CVE-2026-7768

@fastify/accepts-serializer cached serializer-selection results keyed by the request Accept header without a size limit or eviction policy. A remote unauthenticated client could send many distinct but matching Accept header variants to make the cache grow unbounded, eventually exhausting the...

CVE-2026-7768

The CVE affects @fastify/accepts-serializer where serializer-selection results are cached by the request Accept header without bounds or eviction, allowing an unauthenticated remote client to cause unbounded cache growth and Node.js heap exhaustion leading to a crash. Affected versions are

CVE-2026-7768 @fastify/accepts-serializer vulnerable to Denial of Service via Unbounded Accept Header Cache Growth

@fastify/accepts-serializer cached serializer-selection results keyed by the request Accept header without a size limit or eviction policy. A remote unauthenticated client could send many distinct but matching Accept header variants to make the cache grow unbounded, eventually exhausting the...

CVE-2026-7768

@fastify/accepts-serializer cached serializer-selection results keyed by the request Accept header without a size limit or eviction policy. A remote unauthenticated client could send many distinct but matching Accept header variants to make the cache grow unbounded, eventually exhausting the...

CVE-2026-7768 @fastify/accepts-serializer vulnerable to Denial of Service via Unbounded Accept Header Cache Growth

@fastify/accepts-serializer cached serializer-selection results keyed by the request Accept header without a size limit or eviction policy. A remote unauthenticated client could send many distinct but matching Accept header variants to make the cache grow unbounded, eventually exhausting the...

CVE-2026-7768 @fastify/accepts-serializer vulnerable to Denial of Service via Unbounded Accept Header Cache Growth

@fastify/accepts-serializer cached serializer-selection results keyed by the request Accept header without a size limit or eviction policy. A remote unauthenticated client could send many distinct but matching Accept header variants to make the cache grow unbounded, eventually exhausting the...

PT-2026-36915

Name of the Vulnerable Software and Affected Versions @fastify/accepts-serializer versions prior to 6.0.4 Description An issue exists where serializer-selection results are cached using the request Accept header as a key without a size limit or eviction policy. A remote unauthenticated client can...

@fastify/accepts-serializer 安全漏洞

@fastify/accepts-serializer is a plugin developed by Fastify, which automatically selects a serialization method based on the Accept header. Versions of @fastify/accepts-serializer up to 6.0.3 contained security vulnerabilities. These vulnerabilities stemmed from the lack of size limits or evicti...

CVE-2026-7768: Allocation of Resources Without Limits or Throttling

@fastify/accepts-serializer cached serializer-selection results keyed by the request Accept header without a size limit or eviction policy. A remote unauthenticated client could send many distinct but matching Accept header variants to make the cache grow unbounded, eventually exhausting the...

The vulnerability of the onRegister() function in the Fastify framework, a Node.js software platform, allows attackers to compromise the confidentiality and integrity of the protected information.

The vulnerability of the onRegister function in the Fastify framework, a Node.js software platform, is related to the occurrence of interpretation conflicts when processing HTTP headers’ names and values. Exploiting this vulnerability allows an attacker to compromise the confidentiality and...

The vulnerability of the enhanceRequest function in the Fastify Node.js software framework allows a attacker to compromise the confidentiality, integrity, and accessibility of the protected information.

The vulnerability of the enhanceRequest function in the Fastify Node.js software framework is related to the occurrence of interpretation conflicts when processing HTTP header names and values. Exploiting this vulnerability allows a remote attacker to compromise the confidentiality, integrity, an...

The vulnerability of the rewriteRequestHeaders() function in the Fastify framework, a Node.js software platform, allows a malicious actor to gain unauthorized access and modify protected information.

The vulnerability of the rewriteRequestHeaders function in the Fastify framework, a Node.js software platform, is related to HTTP request processing flaws. Exploiting this vulnerability can allow an attacker, operating remotely, to gain unauthorized access and modify protected information...

@13w/local-rag (>=1.6.0, <=1.7.2), @24letters/devservers (>=0.1.0, <=0.6.0) +760 more potentially affected by CVE-2026-6410 via @fastify/static (>=8.0.0, <=9.1.0)

@fastify/static NPM version =8.0.0, =1.6.0, =0.1.0, =0.1.0, =0.4.0, =0.1.0-rc.1, =0.1.0, =1.1.0, =1.1.0, =1.0.0, =1.0.0, =1.0.0, =0.1.0, =0.1.0, =0.1.3 and more Source cves: CVE-2026-6410 Source advisory: OSV:GHSA-PR96-94W5-MX2H...