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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2026-41248

32
FAUCET Score

Clerk JavaScript is the official JavaScript repository for Clerk authentication. createRouteMatcher in @clerk/nextjs, @clerk/nuxt, and @clerk/astro can be bypassed by certain crafted requests, allowing them to skip middleware gating and reach downstream handlers. This vulnerability is fixed in @clerk/astro 1.5.7, 2.17.10, and 3.0.15; @clerk/nextjs 5.7.6, 6.39.2, and 7.2.1; @clerk/nuxt 1.13.28 and 2.2.2; and @clerk/shared 2.22.1, 3.47.4, anc 4.8.1

First published: Apr 24, 2026Last modified: Apr 27, 2026

Impacted Technologies

VendorProductVersion(s)CPE
ClerkAstro
>= 0.0.1, < 1.5.7, >= 2.0.0-snapshot.v20241206174604, <= 2.17.9, >= 3.0.0, < 3.0.15CNA affected
ClerkNextjs
>= 5.0.0, < 5.7.6, >= 6.0.0-snapshot.vb87a27f, < 6.39.2, >= 7.0.0, < 7.2.1CNA affected
ClerkNuxt
>= 1.1.0, < 1.13.28, >= 2.0.0, < 2.2.2CNA affected
ClerkShared
>= 2.20.17, < 2.22.1, >= 3.0.0-canary.v20250225091530, < 3.47.4, >= 4.0.0, < 4.8.1CNA affected

CVSS Data

CVSS version used by this source: 3.1

9.1CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.32%
Probability of exploitation in next 30 days
EPSS Percentile
24.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0032 is in the 4th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (11)

npmpatch availablevia ghsa
Product: @clerk/nextjsFixed in: 5.7.6
npmpatch availablevia ghsa
Product: @clerk/nuxtFixed in: 1.13.28
npmpatch availablevia ghsa
Product: @clerk/astroFixed in: 1.5.7
npmpatch availablevia ghsa
Product: @clerk/sharedFixed in: 2.22.1
npmpatch availablevia ghsa
Product: @clerk/nextjsFixed in: 6.39.2
npmpatch availablevia ghsa
Product: @clerk/nextjsFixed in: 7.2.1
npmpatch availablevia ghsa
Product: @clerk/nuxtFixed in: 2.2.2
npmpatch availablevia ghsa
Product: @clerk/astroFixed in: 2.17.10
npmpatch availablevia ghsa
Product: @clerk/astroFixed in: 3.0.15
npmpatch availablevia ghsa
Product: @clerk/sharedFixed in: 3.47.4
npmpatch availablevia ghsa
Product: @clerk/sharedFixed in: 4.8.1

Vendor Advisories (1)

npmGHSA-vqx2-fgx2-5wq9critical

Official Clerk JavaScript SDKs: Middleware-based route protection bypass

Apr 16, 2026

References

github.com / clerk/javascript/security/advisories/GHSA-vqx2-fgx2-5wq9