CVE-2025-64762CRITICAL 9.1EPSS p24.5%

CVE-2025-64762CVE-2025-64762

Description

The AuthKit library for Next.js provides convenient helpers for authentication and session management using WorkOS & AuthKit with Next.js. In authkit-nextjs version 2.11.0 and below, authenticated responses do not defensively apply anti-caching headers. In environments where CDN caching is enabled, this can result in session tokens being included in cached responses and subsequently served to multiple users. Next.js applications deployed on Vercel are unaffected unless they manually enable CDN caching by setting cache headers on authenticated paths. Patched in authkit-nextjs 2.11.1, which applies anti-caching headers to all responses behind authentication.

Scoring

CVSS 3.19.1 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS0.33% probability of exploitation · percentile 24.5% · 2026-06-19T12:03:05Z
Published2025-11-21
Last modified2025-12-11

Underlying weaknesses· 1

CWE-524

References

  1. https://github.com/workos/authkit-nextjs/commit/94cf438124993abb0e7c19dac64c3cb5724a15ea
  2. https://github.com/workos/authkit-nextjs/releases/tag/v2.11.1
  3. https://github.com/workos/authkit-nextjs/security/advisories/GHSA-p8pf-44ff-93gf

1

TypeTargetConfidenceTier
WeaknessUse of Cache Containing Sensitive Informationcwe-5240%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.