workos authkit-nextjs up to 2.11.0 cache containing sensitive information

Summaryinfo

A vulnerability, which was classified as critical, has been found in workos authkit-nextjs up to 2.11.0. Affected by this issue is some unknown functionality. This manipulation causes use of cache containing sensitive information. This vulnerability appears as CVE-2025-64762. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in workos authkit-nextjs up to 2.11.0 and classified as critical. Affected by this vulnerability is an unknown functionality. The manipulation with an unknown input leads to a use of cache containing sensitive information vulnerability. The CWE definition for the vulnerability is CWE-524. The code uses a cache that contains sensitive information, but the cache can be read by an actor outside of the intended control sphere. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2025-64762 since 11/10/2025. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

Upgrading to version 2.11.1 eliminates this vulnerability.

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Productinfo

Vendor

• workos

Name

• authkit-nextjs

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11.0

Website

• Product: https://github.com/workos/authkit-nextjs/

CPE 2.3info

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CPE 2.2info

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