CVE-2026-34076 | clerk javascript clerkFrontendApiProxy server-side request forgery (GHSA-gjxx-92w9-8v8f)

VDB-354751 · CVE-2026-34076 · GHSA-GJXX-92W9-8V8F CLERK JAVASCRIPT CLERKFRONTENDAPIPROXY SERVER-SIDE REQUEST FORGERY HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.4 $0-$5k 1.10+ Summaryinfo A vulnerability was found in clerk javascript. It has been classified as critical. Affected by this issue is the function clerkFrontendApiProxy. This manipulation causes server-side request forgery. This vulnerability is handled as CVE-2026-34076. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is recommended. Detailsinfo A vulnerability was found in clerk javascript (unknown version). It has been declared as critical. Affected by this vulnerability is the function clerkFrontendApiProxy. The manipulation with an unknown input leads to a server-side request forgery vulnerability. The CWE definition for the vulnerability is CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is: 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 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. This issue has been patched in @clerk/hono version 0.1.5, @clerk/express version 2.0.7, @clerk/backend version 3.2.3, and @clerk/fastify version 3.1.5. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-34076 since 03/25/2026. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. Upgrading eliminates this vulnerability. Productinfo Type Programming Language Software Vendor clerk Name javascript Website Product: https://github.com/clerk/javascript/ CPE 2.3info 🔒 CPE 2.2info 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 6.5 VulDB Meta Temp Score: 6.4 VulDB Base Score: 5.6 VulDB Temp Score: 5.4 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 7.4 CNA Vector (GitHub_M): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Server-side request forgery CWE: CWE-918 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Timelineinfo 03/25/2026 CVE reserved 04/01/2026 +6 days Advisory disclosed 04/01/2026 +0 days VulDB entry created 04/01/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: GHSA-gjxx-92w9-8v8f Status: Confirmed CVE: CVE-2026-34076 (🔒) GCVE (CVE): GCVE-0-2026-34076 GCVE (VulDB): GCVE-100-354751 Entryinfo Created: 04/01/2026 20:54 Changes: 04/01/2026 20:54 (64) Complete: 🔍 Cache ID: 99:064:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸