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...

CVE-2026-34076

The CVE-2026-34076 issue is a SSRF in Clerk JavaScript’s opt-in clerkFrontendApiProxy feature. Affected packages and fix versions are: @clerk/backend (3.0.0–3.2.2; fixed in 3.2.3), @clerk/express (2.0.0–2.0.6; fixed in 2.0.7), @clerk/hono (0.1.0–0.1.4; fixed in 0.1.5), and @clerk/fastify (3.1.0–3...

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...

EUVD-2026-17974

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...

Official Clerk JavaScript SDKs 代码问题漏洞

The Official Clerk JavaScript SDKs are an open-source repository for Clerk authentication purposes. These SDKs have code-related vulnerabilities. The vulnerability stems from the clerkFrontendApiProxy function in @clerk/backend, which involves server-side request forgeing. This could allow...

@clerk/agent-toolkit (>=0.2.9-canary.v20251211104600, <=0.3.6-canary.v20260320105540), @clerk/astro (>=3.0.0-canary.v20251211104600, <=3.0.6-canary.v20260320105540) +9 more potentially affected by CVE-2026-34076 via @clerk/backend (>=3.0.0, <=3.2.2-canary.v20260320105540)

@clerk/backend NPM version =3.0.0, =0.2.9-canary.v20251211104600, =3.0.0-canary.v20251211104600, =2.0.0-canary.v20251211104600, =2.6.9-canary.v20251211104600, =0.0.1, =7.0.0-canary.v20251211104600, =2.0.0-canary.v20251211104600, =3.0.0-canary.v20251211104600, =1.0.0-canary.v20251211104600,...

@clerk/agent-toolkit (>=0.2.9-canary.v20251211104600, <=0.3.6-canary.v20260320105540), @clerk/astro (>=3.0.0-canary.v20251211104600, <=3.0.6-canary.v20260320105540) +9 more potentially affected by CVE-2026-34076 via @clerk/backend (>=3.0.0, <=3.2.2-canary.v20260320105540)

@clerk/backend NPM version =3.0.0, =0.2.9-canary.v20251211104600, =3.0.0-canary.v20251211104600, =2.0.0-canary.v20251211104600, =2.6.9-canary.v20251211104600, =0.0.1, =7.0.0-canary.v20251211104600, =2.0.0-canary.v20251211104600, =3.0.0-canary.v20251211104600, =1.0.0-canary.v20251211104600,...

Server-side Request Forgery (SSRF)

Overview @clerk/backend is a Clerk Backend SDK - REST Client for Backend API & JWT verification utilities Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the clerkFrontendApiProxy function. An attacker can obtain secret keys by crafting a request path that...

GHSA-GJXX-92W9-8V8F Clerk: SSRF in the opt-in clerkFrontendApiProxy feature may leak secret keys to unintended host

Summary The clerkFrontendApiProxy function in @clerk/backend is vulnerable to Server-Side Request Forgery SSRF. An unauthenticated attacker can craft a request path that causes the proxy to send the application's Clerk-Secret-Key to an attacker-controlled server. Affected packages Only applicatio...

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

Summary The clerkFrontendApiProxy function in @clerk/backend is vulnerable to Server-Side Request Forgery SSRF. An unauthenticated attacker can craft a request path that causes the proxy to send the application's Clerk-Secret-Key to an attacker-controlled server. Affected packages Only applicatio...

PT-2026-28602

Summary The clerkFrontendApiProxy function in @clerk/backend is vulnerable to Server-Side Request Forgery SSRF. An unauthenticated attacker can craft a request path that causes the proxy to send the application's Clerk-Secret-Key to an attacker-controlled server. Affected packages Only applicatio...

MAL-2026-410 Malicious code in clerk-js (npm)

--- -= Per source details. Do not edit below this line.=- Source: amazon-inspector 380b4e8d88a5d8a96ffe344566787326dbace52224d29a853cd4553fac40bd1c The package clerk-js was found to contain malicious code. Source: ghsa-malware 2433ecd39bbf328a21740fa34f33bb09d575e76f6f280b915c7ea15fbc55c2b3 Any...

Malicious code in clerk-js (npm)

--- -= Per source details. Do not edit below this line.=- Source: amazon-inspector 380b4e8d88a5d8a96ffe344566787326dbace52224d29a853cd4553fac40bd1c The package clerk-js was found to contain malicious code. Source: ghsa-malware 2433ecd39bbf328a21740fa34f33bb09d575e76f6f280b915c7ea15fbc55c2b3 Any...

Malicious Package

Overview clerk-js is a malicious package. This package contains malicious code, and its content was removed from the official package manager. While this package might be attempting to impersonate a valid organization, there is no connection between that organization and this package authorship...

EUVD-2026-3737

Malicious code in clerk-js npm...

CVE-2025-63700

An issue was discovered in clerk-js 5.88.0 allowing attackers to bypass the OAuth authentication flow by manipulating the request at the OTP verification stage. NOTE: this is disputed by the Supplier because there is no available information to reproduce the issue, and because an OAuth...

@billyjacoby/clerk-react-native (>=1.0.0, <=1.0.4), @breakthroughsales/chrome-extension-remote-code-load-fix (>=1.0.16, <=1.0.22) +9 more potentially affected by CVE-2025-63700 via @clerk/clerk-js (>=5.0.0, <=5.85.0)

@clerk/clerk-js NPM version =5.0.0, =1.0.0, =1.0.16, =0.0.1-canary.v7ae5681, =1.0.0-alpha-v5.0, =1.0.0-alpha-v5.0, =0.1.0, =0.4.2, =0.0.0-snapshot-20240531221728, =1.0.17, =0.8.0, =0.0.0-1765923, =0.23.2 Source cves: CVE-2025-63700 Source advisory: OSV:GHSA-3MM3-WFPV-Q85G...

EUVD-2025-198353

An issue was discovered in Clerk-js 5.88.0 allowing attackers to bypass the OAuth authentication flow by manipulating the request at the OTP verification stage...

Clerk-js vulnerable to bypass of OAuth authentication flow by manipulating request at OTP verification stage

An issue was discovered in Clerk-js 5.88.0 allowing attackers to bypass the OAuth authentication flow by manipulating the request at the OTP verification stage...

GHSA-3MM3-WFPV-Q85G Clerk-js vulnerable to bypass of OAuth authentication flow by manipulating request at OTP verification stage

An issue was discovered in Clerk-js 5.88.0 allowing attackers to bypass the OAuth authentication flow by manipulating the request at the OTP verification stage...