CVE-2026-41248
Auth bypass in Clerk JS routes; bypasses middleware gating.
Is CVE-2026-41248 being exploited?
Not confirmed. CVE-2026-41248 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.32% probability of exploitation in the next 30 days.
How severe is CVE-2026-41248?
CVE-2026-41248 is rated Critical with a CVSS score of 9.1. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-41248?
Yes. A fix has been recorded for CVE-2026-41248. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-41248 affect?
CVE-2026-41248 affects @clerk/nextjs, @clerk/nuxt, @clerk/astro, @clerk/shared. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-41248?
Upgrade to fixed Clerk packages (see versions above).
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Attacker can bypass auth gating and reach downstream handlers; unauthorized actions possible.
Patch when possible
- affected>= 0.0.1 and < 1.5.7
- affected>= 2.0.0-snapshot.v20241206174604 and <= 2.17.9
- affected>= 3.0.0 and < 3.0.15
- affected>= 5.0.0 and < 5.7.6
- affected>= 6.0.0-snapshot.vb87a27f and < 6.39.2
- affected>= 7.0.0 and < 7.2.1
- affected>= 1.1.0 and < 1.13.28
- affected>= 2.0.0 and < 2.2.2
- affected>= 2.20.17 and < 2.22.1
- affected>= 3.0.0-canary.v20250225091530 and < 3.47.4
- affected>= 4.0.0 and < 4.8.1
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.