Is CVE-2026-41248 in the CISA KEV catalog?

No. CVE-2026-41248 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-41248?

CVE-2026-41248 has a CVSS v3 base score of 9.1 (CRITICAL).

What is the EPSS score for CVE-2026-41248?

CVE-2026-41248 has an EPSS score of 0.32% (24th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2026-41248?

No published fix for CVE-2026-41248 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2026-41248

CRITICAL

9.1

CVSS v3

NVD

Description

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

CWE-436 CWE-863Incorrect Authorization

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

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CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

0.32%probability of exploitation in 30 days

24thpercentile

Low risk: more likely to be exploited than 24% of all known CVEs.

References

Other references1

github.com

Related Vulnerabilities

Other CWE-436 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-25292	Critical	9.8	64%	-	Fix
CVE-2022-37436	Medium	5.3	58%	-	Fix
CVE-2021-28474	High	8.8	51%	-	Fix
CVE-2025-25291	Critical	9.8	20%	-	Fix
CVE-2026-63030	Critical	9.8	8.9%	KEV	Fix
CVE-2019-17596	High	7.5	4.7%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-29.