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...

@clerk/agent-toolkit (>=0.3.1-canary.v20260303211310 <=0.3.16-snapshot.v20260416221307), @clerk/astro (>=3.0.1-canary.v20260303211310 <=3.0.18-snapshot.v20260421194054) +9 more potentially affected by CVE-2026-42349 via @clerk/backend (>=3.0.0 <=3.2.14-snapshot.v20260421194054)

@clerk/backend NPM version =3.0.0, =0.3.1-canary.v20260303211310, =3.0.1-canary.v20260303211310, =2.0.1-canary.v20260303211310, =3.0.1-canary.v20260303211310, =0.0.3-canary.v20260303211310, =7.0.1-canary.v20260303211310, =2.0.1-canary.v20260303211310, =3.0.1-canary.v20260303211310,...

EUVD-2026-23243

@fastify/static vulnerable to path traversal in directory listing...

@13w/local-rag (>=1.6.0 <=1.7.2), @24letters/devservers (>=0.1.0 <=0.5.0) +632 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, =1.0.0, =1.0.0, =1.0.0, =0.1.0, =0.1.0, =1.0.0-beta.23, =0.0.1, =1.0.0, =4.76.1 - @akiojin/claude-worktree =1.33.0 and more Source cves: CVE-2026-6410 Source advisory: OSV:GHSA-PR96-94W5-MX2H...

@fastify/static vulnerable to path traversal in directory listing

Impact @fastify/static v9.1.0 and earlier serves directory listings outside the configured static root when the list option is enabled. A request such as /public/../outside/ causes dirList.path to resolve a directory outside the root via path.join without a containment check. A remote...

GHSA-PR96-94W5-MX2H @fastify/static vulnerable to path traversal in directory listing

Impact @fastify/static v9.1.0 and earlier serves directory listings outside the configured static root when the list option is enabled. A request such as /public/../outside/ causes dirList.path to resolve a directory outside the root via path.join without a containment check. A remote...

@13w/local-rag (>=1.6.0 <=1.7.2), @24letters/devservers (>=0.1.0 <=0.5.0) +632 more potentially affected by CVE-2026-6414 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, =1.0.0, =1.0.0, =1.0.0, =0.1.0, =0.1.0, =1.0.0-beta.23, =0.0.1, =1.0.0, =4.76.1 - @akiojin/claude-worktree =1.33.0 and more Source cves: CVE-2026-6414 Source advisory: OSV:GHSA-X428-GHPX-8J92...

EUVD-2026-23227

@fastify/static vulnerable to route guard bypass via encoded path separators...

@fastify/static vulnerable to route guard bypass via encoded path separators

Impact @fastify/static v9.1.0 and earlier decodes percent-encoded path separators %2F before filesystem resolution, but Fastify's router treats them as literal characters. This creates a routing mismatch: route guards on /admin/ do not match /admin%2Fsecret.html, but @fastify/static decodes it to...

GHSA-X428-GHPX-8J92 @fastify/static vulnerable to route guard bypass via encoded path separators

Impact @fastify/static v9.1.0 and earlier decodes percent-encoded path separators %2F before filesystem resolution, but Fastify's router treats them as literal characters. This creates a routing mismatch: route guards on /admin/ do not match /admin%2Fsecret.html, but @fastify/static decodes it to...

EUVD-2026-23241

@fastify/middie vulnerable to middleware authentication bypass in child plugin scopes...

@bechara/crux (>=6.0.0 <=6.6.2), @cappa/cli (>=0.1.0 <=0.8.2) +10 more potentially affected by CVE-2026-6270 via @fastify/middie (>=9.0.2 <=9.3.1)

@fastify/middie NPM version =9.0.2, =6.0.0, =0.1.0, =0.1.0, =1.0.0, =1.0.11, =0.1.51, =1.0.36, =11.0.0, =1.3.0, =5.0.0, =0.6.1-dev, =1.1.48 Source cves: CVE-2026-6270 Source advisory: SNYK:JS-FASTIFYMIDDIE-16098213...

@fastify/middie vulnerable to middleware authentication bypass in child plugin scopes

Impact @fastify/middie v9.3.1 and earlier incorrectly re-prefixes middleware paths when propagating them to child plugin scopes. When a child plugin is registered with a prefix that overlaps with a parent-scoped middleware path, the middleware path is modified during inheritance and silently fail...

GHSA-72C6-FX6Q-FR5W @fastify/middie vulnerable to middleware authentication bypass in child plugin scopes

Impact @fastify/middie v9.3.1 and earlier incorrectly re-prefixes middleware paths when propagating them to child plugin scopes. When a child plugin is registered with a prefix that overlaps with a parent-scoped middleware path, the middleware path is modified during inheritance and silently fail...

@bechara/crux (>=6.0.0 <=6.6.2), @cappa/cli (>=0.1.0 <=0.8.2) +10 more potentially affected by CVE-2026-33804 via @fastify/middie (>=9.0.2 <=9.3.1)

@fastify/middie NPM version =9.0.2, =6.0.0, =0.1.0, =0.1.0, =1.0.0, =1.0.11, =0.1.51, =1.0.36, =11.0.0, =1.3.0, =5.0.0, =0.6.1-dev, =1.1.48 Source cves: CVE-2026-33804 Source advisory: SNYK:JS-FASTIFYMIDDIE-16098212...

Interpretation Conflict

Overview @fastify/middie is a Middleware engine for Fastify Affected versions of this package are vulnerable to Interpretation Conflict in the resolveNormalizationOptions function's deprecated ignoreDuplicateSlashes configuration option. An attacker can bypass middleware by crafting URLs with...

EUVD-2026-23235

@fastify/middie vulnerable to middleware bypass via deprecated ignoreDuplicateSlashes option...

@fastify/middie vulnerable to middleware bypass via deprecated ignoreDuplicateSlashes option

Impact @fastify/middie v9.3.1 and earlier does not read the deprecated but still functional top-level ignoreDuplicateSlashes option, only reading from routerOptions. This creates a normalization gap: Fastify's router normalizes duplicate slashes but middie does not, allowing middleware bypass via...

CVE-2026-33805

A flaw was found in @fastify/reply-from and @fastify/http-proxy. A remote attacker can exploit this vulnerability by manipulating the Connection header in client requests. This allows the attacker to remove specific headers that the proxy has added for security, routing, or access control purpose...