CVE-2026-41248 Official Clerk JavaScript SDKs: Middleware-based route protection bypass

Clerk JavaScript is the official JavaScript repository for Clerk authentication. createRouteMatcher in @clerk/nextjs, @clerk/nuxt, and @clerk/astro can be bypassed by certain crafted requests, allowing them to skip middleware gating and reach downstream handlers. This vulnerability is fixed in...

Official Clerk JavaScript SDKs 安全漏洞

The Official Clerk JavaScript SDKs are an open-source repository for Clerk authentication purposes. These SDKs contain security vulnerabilities; one of them allows for specially crafted requests to bypass the middleware gateways, resulting in access to downstream processing routines...

Incorrect Authorization

Overview @clerk/nextjs is a Clerk SDK for NextJS Affected versions of this package are vulnerable to Incorrect Authorization via the createPathMatcher function in @clerk/shared used by downstream createRouteMatcher. An attacker can gain unauthorized access to protected routes by crafting requests...

Incorrect Authorization

Overview @clerk/astro is a Clerk SDK for Astro Affected versions of this package are vulnerable to Incorrect Authorization via the createPathMatcher function in @clerk/shared used by downstream createRouteMatcher. An attacker can gain unauthorized access to protected routes by crafting requests...

@clerk/agent-toolkit (>=0.2.9-canary.v20251211104600, <=0.3.14-snapshot.v20260414205636), @clerk/astro (>=3.0.0-canary.v20251211104600, <=3.0.14-snapshot.v20260414205636) +43 more potentially affected by CVE-2026-41248 via @clerk/shared (>=4.0.0, <=4.8.0-snapshot.v20260414205636)

@clerk/shared NPM version =4.0.0, =0.2.9-canary.v20251211104600, =3.0.0-canary.v20251211104600, =3.0.0-canary.v20251211104600, =3.0.0-canary.v20251211104600, =3.0.0-snapshot.v20251216175437, =3.0.0-canary.v20251211104600, =0.4.26-snapshot.v20260226165729, =2.0.0-canary.v20251211104600,...

@bentwnghk/chat (>=1.45.5, <=1.45.6), @clerk/elements (0.0.2-snapshot.vc65ad98) +2 more potentially affected by CVE-2026-41248 via @clerk/nextjs (>=5.0.1-snapshot.vc65ad98, <=5.7.5)

@clerk/nextjs NPM version =5.0.1-snapshot.vc65ad98, =1.45.5, =1.2.8, =1.2.9 - @spike-npm-land/code 0.9.55 Source cves: CVE-2026-41248 Source advisory: OSV:GHSA-VQX2-FGX2-5WQ9...

@bentwnghk/chat (>=1.91.2, <=1.91.6), @lobehub/chat (>=1.49.5, <=1.49.12) +2 more potentially affected by CVE-2026-41248 via @clerk/nextjs (>=6.3.1, <=6.28.1)

@clerk/nextjs NPM version =6.3.1, =1.91.2, =1.49.5, =0.0.2, =0.17.0-alpha.9, =0.17.3-centauri.0 Source cves: CVE-2026-41248 Source advisory: OSV:GHSA-VQX2-FGX2-5WQ9...

@aurora-nexus/aurora-nexus-design-system (0.2.0), @fireproof/core-protocols-dashboard (>=0.24.3-dev-20261224, <=0.24.12) +6 more potentially affected by CVE-2026-41248 via @clerk/shared (>=3.36.0, <=3.45.1)

@clerk/shared NPM version =3.36.0, =0.24.3-dev-20261224, =0.24.3-dev-20261224, =0.24.3-dev-20261224, =0.0.14, =0.18.25-dev, =0.24.3-dev-20261224, =0.18.25-dev, =0.18.28-dev Source cves: CVE-2026-41248 Source advisory: OSV:GHSA-VQX2-FGX2-5WQ9...

Incorrect Authorization

Overview @clerk/nuxt is a Clerk SDK for Nuxt Affected versions of this package are vulnerable to Incorrect Authorization via the createPathMatcher function in @clerk/shared used by downstream createRouteMatcher. An attacker can gain unauthorized access to protected routes by crafting requests tha...

Official Clerk JavaScript SDKs: Middleware-based route protection bypass

Summary createRouteMatcher in @clerk/nextjs, @clerk/nuxt, and @clerk/astro can be bypassed by certain crafted requests, allowing them to skip middleware gating and reach downstream handlers. Sessions are not compromised and no existing user can be impersonated - the bypass only affects the...

GHSA-VQX2-FGX2-5WQ9 Official Clerk JavaScript SDKs: Middleware-based route protection bypass

Summary createRouteMatcher in @clerk/nextjs, @clerk/nuxt, and @clerk/astro can be bypassed by certain crafted requests, allowing them to skip middleware gating and reach downstream handlers. Sessions are not compromised and no existing user can be impersonated - the bypass only affects the...

@clerk/agent-toolkit (>=0.2.9-canary.v20251211104600, <=0.3.14-snapshot.v20260414205636), @clerk/astro (>=3.0.0-canary.v20251211104600, <=3.0.14-snapshot.v20260414205636) +43 more potentially affected by CVE-2026-41248 via @clerk/shared (>=4.0.0, <=4.8.0-snapshot.v20260414205636)

@clerk/shared NPM version =4.0.0, =0.2.9-canary.v20251211104600, =3.0.0-canary.v20251211104600, =3.0.0-canary.v20251211104600, =3.0.0-canary.v20251211104600, =3.0.0-snapshot.v20251216175437, =3.0.0-canary.v20251211104600, =0.4.26-snapshot.v20260226165729, =2.0.0-canary.v20251211104600,...

Incorrect Authorization

Overview @clerk/shared is an Internal package utils used by the Clerk SDKs Affected versions of this package are vulnerable to Incorrect Authorization via the createPathMatcher function in @clerk/shared used by downstream createRouteMatcher. An attacker can gain unauthorized access to protected...

@bentwnghk/chat (>=1.91.2, <=1.91.6), @lobehub/chat (>=1.49.5, <=1.49.12) +2 more potentially affected by CVE-2026-41248 via @clerk/nextjs (>=6.3.1, <=6.28.1)

@clerk/nextjs NPM version =6.3.1, =1.91.2, =1.49.5, =0.0.2, =0.17.0-alpha.9, =0.17.3-centauri.0 Source cves: CVE-2026-41248 Source advisory: SNYK:JS-CLERKNEXTJS-16098250...

@bentwnghk/chat (>=1.45.5, <=1.45.6), @clerk/elements (0.0.2-snapshot.vc65ad98) +2 more potentially affected by CVE-2026-41248 via @clerk/nextjs (>=5.0.1-snapshot.vc65ad98, <=5.7.5)

@clerk/nextjs NPM version =5.0.1-snapshot.vc65ad98, =1.45.5, =1.2.8, =1.2.9 - @spike-npm-land/code 0.9.55 Source cves: CVE-2026-41248 Source advisory: SNYK:JS-CLERKNEXTJS-16098250...

PT-2026-35082

Name of the Vulnerable Software and Affected Versions @clerk/astro versions prior to 1.5.7 @clerk/astro versions prior to 2.17.10 @clerk/astro versions prior to 3.0.15 @clerk/nextjs versions prior to 5.7.6 @clerk/nextjs versions prior to 6.39.2 @clerk/nextjs versions prior to 7.2.1 @clerk/nuxt...

CVE-2026-34076

Clerk JavaScript is the official JavaScript repository for Clerk authentication. In @clerk/hono from versions 0.1.0 to before 0.1.5, @clerk/express from versions 2.0.0 to before 2.0.7, @clerk/backend from versions 3.0.0 to before 3.2.3, and @clerk/fastify from versions 3.1.0 to before 3.1.5, the...

CVE-2026-34076

Clerk JavaScript is the official JavaScript repository for Clerk authentication. In @clerk/hono from versions 0.1.0 to before 0.1.5, @clerk/express from versions 2.0.0 to before 2.0.7, @clerk/backend from versions 3.0.0 to before 3.2.3, and @clerk/fastify from versions 3.1.0 to before 3.1.5, the...

CVE-2026-34076

Clerk JavaScript is the official JavaScript repository for Clerk authentication. In @clerk/hono from versions 0.1.0 to before 0.1.5, @clerk/express from versions 2.0.0 to before 2.0.7, @clerk/backend from versions 3.0.0 to before 3.2.3, and @clerk/fastify from versions 3.1.0 to before 3.1.5, the...

CVE-2026-34076 Clerk JavaScript: SSRF in the opt-in clerkFrontendApiProxy feature may leak secret keys to unintended host

Clerk JavaScript is the official JavaScript repository for Clerk authentication. In @clerk/hono from versions 0.1.0 to before 0.1.5, @clerk/express from versions 2.0.0 to before 2.0.7, @clerk/backend from versions 3.0.0 to before 3.2.3, and @clerk/fastify from versions 3.1.0 to before 3.1.5, the...