High (8.1) in workos authkit-nextjs. EPSS 0.7% chance of exploitation in the next 30 days. Fixed in @workos-inc/authkit-nextjs 0.4.2.
The AuthKit library for Next.js provides helpers for authentication and session management using WorkOS & AuthKit with Next.js.
A user can reuse an expired session by controlling the `x-workos-session` header. The vulnerability is patched in v0.4.2.
Severity
CVSS 3.1
8.1 high
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
0.7% chance of exploitation in the next 30 days; higher than 51% of CVEs (scores of 2026-10-31)