Vulnerability · Published Aug 9, 2025 · Assigned by GitHub_M

CVE-2025-55008AuthKit React Router: Sensitive auth data rendered in HTML

High 7.1

In plain English

A high-severity information exposure in authkit-react-router from workos. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.1High

Exploit odds (30 days)0.4%top 64.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

The AuthKit library for React Router 7+ provides helpers for authentication and session management using WorkOS & AuthKit with React Router. In versions 0.6.1 and below, @workos-inc/authkit-react-router exposed sensitive authentication artifacts — specifically sealedSession and accessToken by returning them from the authkitLoader. This caused them to be rendered into the browser HTML. This issue is fixed in version 0.7.0.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	@workos-inc/authkit-react-router	0.7.0	GHSA-vqvc-9q8x-vmq6

Affected products (as reported)

Vendor	Product	Versions
workos	authkit-react-router	< 0.7.0

Weakness: CWE-200 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L

References

https://github.com/workos/authkit-react-router/security/advisories/GHSA-vqvc-9q8x-vmq6 x_refsource_CONFIRM
https://github.com/workos/authkit-react-router/commit/607caac658784962bab76e227f9c5820d0b9a9e5 x_refsource_MISC
https://github.com/workos/authkit-react-router/releases/tag/v0.7.0 x_refsource_MISC