# Clerk has an authorization bypass when combining organization, billing, or reverification checks

Advisory record · `GHSA-w24r-5266-9c3c`

- **Identifiers:** `GHSA-w24r-5266-9c3c` · `CVE-2026-42349`
- **State:** Confirmed
- **Severity:** CVSS 7.6 High
- **Critical:** No
- **Weakness (CWE):** [CWE-754](https://cwe.mitre.org/data/definitions/754.html) · [CWE-863](https://cwe.mitre.org/data/definitions/863.html)
- **Tags:** [Broken access control](https://agentprime.io/advisories/tag/access-control.md) · [CWE-754](https://agentprime.io/advisories/tag/cwe-754.md)
- **Published:** 30 Apr 2026
- **Updated:** 10 Sept 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 30 Apr 2026, 18:20 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `@clerk/shared` (npm): affected `>=3.0.0, <3.47.5 || >=4.0.0, <4.8.3`; fixed in `3.47.5`, `4.8.3`
- `@clerk/backend` (npm): affected `>=2.0.0, <2.33.3 || >=3.0.0, <3.2.14`; fixed in `2.33.3`, `3.2.14`
- `@clerk/nextjs` (npm): affected `>=6.0.0, <6.39.3 || >=7.0.0, <7.2.4`; fixed in `6.39.3`, `7.2.4`
- `@clerk/clerk-js` (npm): affected `>=5.22.0, <5.125.10 || >=6.0.0, <6.7.5`; fixed in `5.125.10`, `6.7.5`
- `@clerk/clerk-react` (npm): affected `>=5.9.0, <5.61.6`; fixed in `5.61.6`
- `@clerk/react` (npm): affected `>=6.0.0, <6.4.3`; fixed in `6.4.3`
- `@clerk/vue` (npm): affected `>=1.0.0, <1.17.21 || >=2.0.0, <2.0.16`; fixed in `1.17.21`, `2.0.16`
- `@clerk/astro` (npm): affected `>=2.0.0, <2.17.11 || >=3.0.0, <3.0.18`; fixed in `2.17.11`, `3.0.18`
- `@clerk/nuxt` (npm): affected `>=1.0.0, <1.13.29 || >=2.0.0, <2.2.5`; fixed in `1.13.29`, `2.2.5`
- `@clerk/clerk-expo` (npm): affected `>=2.2.11, <2.19.36`; fixed in `2.19.36`
- `@clerk/expo` (npm): affected `>=3.0.0, <3.2.2`; fixed in `3.2.2`
- `@clerk/react-router` (npm): affected `>=0.0.1, <2.4.13 || >=3.0.0, <3.1.4`; fixed in `2.4.13`, `3.1.4`
- `@clerk/tanstack-react-start` (npm): affected `>=0.0.1, <0.29.11 || >=1.0.0, <1.1.4`; fixed in `0.29.11`, `1.1.4`
- `@clerk/chrome-extension` (npm): affected `>=1.3.5, <2.9.15 || >=3.0.0, <3.1.15`; fixed in `2.9.15`, `3.1.15`
- `@clerk/fastify` (npm): affected `>=1.0.42, <2.6.31 || >=3.0.0, <3.1.16`; fixed in `2.6.31`, `3.1.16`
- `@clerk/express` (npm): affected `>=0.1.0, <1.7.79 || >=2.0.0, <2.1.6`; fixed in `1.7.79`, `2.1.6`
- `@clerk/hono` (npm): affected `>=0.0.2, <0.1.16`; fixed in `0.1.16`

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 7.6 High, CVSS 4.0: `CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0025, the 15th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the GitHub Advisory Database, published 30 Apr 2026. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-w24r-5266-9c3c](https://github.com/advisories/GHSA-w24r-5266-9c3c)
- [OSV: GHSA-w24r-5266-9c3c](https://osv.dev/vulnerability/GHSA-w24r-5266-9c3c)
- <https://github.com/clerk/javascript/security/advisories/GHSA-w24r-5266-9c3c>
- <https://nvd.nist.gov/vuln/detail/CVE-2026-42349>
- <https://github.com/clerk/javascript>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-w24r-5266-9c3c>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-w24r-5266-9c3c/>. Everything for agents: <https://agentprime.io/llms.txt>.