CVE-2026-42349Clerk: Authorization bypass when combining organization, billing, or reverification checks
- 7.6HighCVSS base score
- 0.25%Exploitation in 30 daysEPSS · top 84% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- YesPublic exploitsa reference or SSVC says so
Description
Clerk JavaScript is the official JavaScript repository for Clerk authentication. has(), auth.protect(), and related authorization predicates in @clerk/shared, @clerk/nextjs, @clerk/backend, and other framework SDKs can return true for certain combined authorization checks when the result should be false, allowing a gated action to proceed for a user who does not satisfy the full set of requested conditions. This call shape can be bypassed if certain conditions are met: a has() or auth.protect() call that combines a reverification check with any of role, permission, feature, or plan, or that combines a billing check (feature or plan) with a role or permission check. This vulnerability is fixed in @clerk/clerk-js 5.125.10 and 6.7.5.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. A reference of the record is tagged as an exploit. CISA's SSVC rates its exploitation: a proof of concept is public.
Show the exploits1
References tagged exploit1 reference
- https://github.com/clerk/javascript/security/advisories/GHSA-w24r-5266-9c3c (opens in a new tab)x_refsource_CONFIRMexploit
Timeline
ID reserved
By GitHub_M
- 15 days later
· 15 days later
Published
- 3 days later
· 3 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 4.0 | High7.6 | 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 |
| NVDNVD · Analyzed | 4.0 | High7.6 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
- EPSS (exploitation in 30 days)
- 0.25% · top 84% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.6.
Affected products
- affected >= 5.22.0, < 5.125.10
- affected >= 6.0.0, < 6.7.5
- affected >= 3.0.0, <= 3.47.4
- affected >= 4.0.0, <= 4.8.2
- affected >= 2.0.0, <= 2.33.2
- affected >= 3.0.0, <= 3.2.13
- affected >= 6.0.0, <= 6.39.2
- affected >= 7.0.0, <= 7.2.3
- affected >= 5.9.0, <= 5.61.5
- affected >= 6.0.0, <= 6.4.2
- affected >= 1.0.0, <= 1.17.20
- affected >= 2.0.0, <= 2.0.15
- affected >= 2.0.0, <= 2.17.10
- affected >= 3.0.0, <= 3.0.17
- affected >= 1.0.0, <= 1.13.28
- affected >= 2.0.0, <= 2.2.4
- affected >= 2.2.11, <= 2.19.35
- affected >= 3.0.0, <= 3.2.1
- affected >= 0.0.1, <= 2.4.12
- affected >= 3.0.0, <= 3.1.3
- affected >= 0.0.1, <= 0.29.10
- affected >= 1.0.0, <= 1.1.3
- affected >= 1.3.5, <= 2.9.14
- affected >= 3.0.0, <= 3.1.14
- affected >= 1.0.42, <= 2.6.30
- affected >= 3.0.0, <= 3.1.15
- affected >= 0.1.0, <= 1.7.78
- affected >= 2.0.0, <= 2.1.5
- affected >= 0.0.2, <= 0.1.15
Affected packages
Affected packages17
From reviewed advisories of the GitHub Advisory Database.
- npm@clerk/astroGHSA-w24r-5266-9c3c (opens in a new tab)
- npm@clerk/backendGHSA-w24r-5266-9c3c (opens in a new tab)
- npm@clerk/chrome-extensionGHSA-w24r-5266-9c3c (opens in a new tab)
- npm@clerk/clerk-expoGHSA-w24r-5266-9c3c (opens in a new tab)
- npm@clerk/clerk-jsGHSA-w24r-5266-9c3c (opens in a new tab)
- npm@clerk/clerk-reactGHSA-w24r-5266-9c3c (opens in a new tab)
- npm@clerk/expoGHSA-w24r-5266-9c3c (opens in a new tab)
- npm@clerk/expressGHSA-w24r-5266-9c3c (opens in a new tab)
- npm@clerk/fastifyGHSA-w24r-5266-9c3c (opens in a new tab)
- npm@clerk/honoGHSA-w24r-5266-9c3c (opens in a new tab)
- npm@clerk/nextjsGHSA-w24r-5266-9c3c (opens in a new tab)
- npm@clerk/nuxtGHSA-w24r-5266-9c3c (opens in a new tab)
- npm@clerk/reactGHSA-w24r-5266-9c3c (opens in a new tab)
- npm@clerk/react-routerGHSA-w24r-5266-9c3c (opens in a new tab)
- npm@clerk/sharedGHSA-w24r-5266-9c3c (opens in a new tab)
- npm@clerk/tanstack-react-startGHSA-w24r-5266-9c3c (opens in a new tab)
- npm@clerk/vueGHSA-w24r-5266-9c3c (opens in a new tab)
References
References1
- https://github.com/clerk/javascript/security/advisories/GHSA-w24r-5266-9c3c (opens in a new tab)x_refsource_CONFIRMexploit
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-29125 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-w24r-5266-9c3c (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-42349)Record last updated .