{"answers":{"affected":"8 open source packages ship an affected version, including @clerk/backend, @clerk/express and @clerk/fastify.","exploited":"There is no known exploitation of CVE-2026-34076 in the wild and no public exploit code.","fix":"Upgrade @clerk/backend to 3.2.3 or later.","what":"CVE-2026-34076 is a high-severity server-side request forgery vulnerability in clerk javascript, published on 1 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-34076 and fix it if it is affected.\n\nWhat it is: CVE-2026-34076 is a high-severity server-side request forgery vulnerability in clerk javascript, published on 1 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-34076 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- @clerk/backend (npm): affected from 3.0.0; fixed in 3.2.3\n- @clerk/backend (npm): affected from 3.0.0; fixed in 3.2.3\n- @clerk/express (npm): affected from 2.0.0; fixed in 2.0.7\n- @clerk/express (npm): affected from 2.0.0; fixed in 2.0.7\n- @clerk/fastify (npm): affected from 3.1.0; fixed in 3.1.5\n- @clerk/fastify (npm): affected from 3.1.0; fixed in 3.1.5\n- @clerk/hono (npm): affected from 0.1.0; fixed in 0.1.5\n- @clerk/hono (npm): affected from 0.1.0; fixed in 0.1.5\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-34076/ (Markdown: https://insights.sbomify.com/CVE-2026-34076/index.md)","id":"CVE-2026-34076","markdown":"https://insights.sbomify.com/CVE-2026-34076/index.md","name":"CVE-2026-34076","record":{"aliases":["GHSA-gjxx-92w9-8v8f"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"Clerk JavaScript library","requires_auth":"none","summary":"An unauthenticated attacker can exploit an SSRF vulnerability in the opt-in proxy feature to leak secret keys to an external server.","user_interaction":"not_required","vuln_class":"ssrf"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":7.4,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-918","name":"Server-Side Request Forgery"}],"description":"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.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Clerk JavaScript: SSRF in the opt-in clerkFrontendApiProxy feature may leak secret keys to unintended host","id":"CVE-2026-34076","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"ssrf","year":"2026"},"n_packages":8,"n_references":1,"next":{"headline":"React Router vulnerable to Denial of Service via reflected user input in single-fetch","id":"CVE-2026-34077"},"packages":[{"ecosystem":"npm","fixed":["3.2.3"],"introduced":["3.0.0"],"last_affected":[],"package":"@clerk/backend","purl":null,"source":"GHSA-gjxx-92w9-8v8f"},{"ecosystem":"npm","fixed":["3.2.3"],"introduced":["3.0.0"],"last_affected":[],"package":"@clerk/backend","purl":"pkg:npm/%40clerk/backend","source":"GHSA-gjxx-92w9-8v8f"},{"ecosystem":"npm","fixed":["2.0.7"],"introduced":["2.0.0"],"last_affected":[],"package":"@clerk/express","purl":null,"source":"GHSA-gjxx-92w9-8v8f"},{"ecosystem":"npm","fixed":["2.0.7"],"introduced":["2.0.0"],"last_affected":[],"package":"@clerk/express","purl":"pkg:npm/%40clerk/express","source":"GHSA-gjxx-92w9-8v8f"},{"ecosystem":"npm","fixed":["3.1.5"],"introduced":["3.1.0"],"last_affected":[],"package":"@clerk/fastify","purl":null,"source":"GHSA-gjxx-92w9-8v8f"},{"ecosystem":"npm","fixed":["3.1.5"],"introduced":["3.1.0"],"last_affected":[],"package":"@clerk/fastify","purl":"pkg:npm/%40clerk/fastify","source":"GHSA-gjxx-92w9-8v8f"},{"ecosystem":"npm","fixed":["0.1.5"],"introduced":["0.1.0"],"last_affected":[],"package":"@clerk/hono","purl":null,"source":"GHSA-gjxx-92w9-8v8f"},{"ecosystem":"npm","fixed":["0.1.5"],"introduced":["0.1.0"],"last_affected":[],"package":"@clerk/hono","purl":"pkg:npm/%40clerk/hono","source":"GHSA-gjxx-92w9-8v8f"}],"prev":{"headline":"cryptography has incomplete DNS name constraint enforcement on peer names","id":"CVE-2026-34073"},"products":["javascript"],"published":"2026-04-01","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-04-01","vendors":["clerk"]},"summary":"An unauthenticated attacker can exploit an SSRF vulnerability in the opt-in proxy feature to leak secret keys to an external server.","url":"https://insights.sbomify.com/CVE-2026-34076/"}