CVE-2025-55009
AuthKit: Sensitive auth data rendered in HTML
The AuthKit library for Remix provides convenient helpers for authentication and session management using WorkOS & AuthKit with Remix. In versions 0.14.1 and below, @workos-inc/authkit-remix exposed sensitive authentication artifacts — specifically sealedSession and accessToken — by returning them from the authkitLoader. This caused them to be rendered into the browser HTML.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
AuthKit: Sensitive auth data rendered in HTML
The AuthKit library for Remix provides convenient helpers for authentication and session management using WorkOS & AuthKit with Remix. In versions 0.14.1 and below, @workos-inc/authkit-remix exposed sensitive authentication artifacts — specifically sealedSession and accessToken — by returning them from the authkitLoader. This caused them to be rendered into the browser HTML.
- Record
CVE-2025-55009- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L - Weakness
- CWE-200
- Updated
- 2026-11-02
EUVDEUVD-2025-24030
The AuthKit library for Remix provides convenient helpers for authentication and session management using WorkOS & AuthKit with Remix. In versions 0.14.1 and below, @workos-inc/authkit-remix exposed sensitive authentication artifacts — specifically sealedSession and accessToken — by returning them from the authkitLoader. This caused them to be rendered into the browser HTML.
- Record
EUVD-2025-24030- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-v3gr-w9gf-23cx
The AuthKit Remix Library renders sensitive auth data in HTML
Summary
Before 0.15.0, @workos-inc/authkit-remix returned sensitive authentication artifacts from the authkitLoader, specifically sealedSession and accessToken. Because these values were returned from the loader, they were embedded into the server-rendered HTML and became readable by any script with access to the page’s DOM (e.g., in the presence of XSS or a malicious browser extension).
- Impact: Exposure of these secrets can lead to session hijacking and unauthorized API access.
- Fix: Version
0.15.0changes the default behavior so the loader no longer returnssealedSession/accessToken. A secure server-side mechanism is provided to fetch an access token when needed.
Patches
Patched in v0.15.0.
- Record
GHSA-v3gr-w9gf-23cx- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L - Weakness
- CWE-200
- Updated
- 2026-11-02
NVD
The AuthKit library for Remix provides convenient helpers for authentication and session management using WorkOS & AuthKit with Remix. In versions 0.14.1 and below, @workos-inc/authkit-remix exposed sensitive authentication artifacts — specifically sealedSession and accessToken — by returning them from the authkitLoader. This caused them to be rendered into the browser HTML.
- Record
CVE-2025-55009- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L - Weakness
- CWE-200
- Updated
- 2026-11-02
OSV
AuthKit: Sensitive auth data rendered in HTML
The AuthKit library for Remix provides convenient helpers for authentication and session management using WorkOS & AuthKit with Remix. In versions 0.14.1 and below, @workos-inc/authkit-remix exposed sensitive authentication artifacts — specifically sealedSession and accessToken — by returning them from the authkitLoader. This caused them to be rendered into the browser HTML.
- Record
CVE-2025-55009- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L - Weakness
- CWE-200
- Updated
- 2026-11-02
OSVGHSA-v3gr-w9gf-23cx
The AuthKit Remix Library renders sensitive auth data in HTML
Summary
Before 0.15.0, @workos-inc/authkit-remix returned sensitive authentication artifacts from the authkitLoader, specifically sealedSession and accessToken. Because these values were returned from the loader, they were embedded into the server-rendered HTML and became readable by any script with access to the page’s DOM (e.g., in the presence of XSS or a malicious browser extension).
- Impact: Exposure of these secrets can lead to session hijacking and unauthorized API access.
- Fix: Version
0.15.0changes the default behavior so the loader no longer returnssealedSession/accessToken. A secure server-side mechanism is provided to fetch an access token when needed.
Patches
Patched in v0.15.0.
- Record
GHSA-v3gr-w9gf-23cx- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L - Weakness
- CWE-200
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
@workos-inc/authkit-remixnpm |
before 0.15.0 | 0.15.0 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-55009 is a high vulnerability (CVSS 7.1) in Workos Authkit-remix, published August 8, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.41%, the 35th percentile. Fixed in @workos-inc/authkit-remix 0.15.0.
References
github.com/workos/authkit-remix/security/advisories/GHSA-v3gr-w9gf-23cx
nvd.nist.gov/vuln/detail/CVE-2025-55009
osv.dev/vulnerability/CVE-2025-55009