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.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | @workos-inc/authkit-remix | < 0.15.0 | 0.15.0 |
References
- https://github.com/workos/authkit-remix/security/advisories/GHSA-v3gr-w9gf-23cx
- https://nvd.nist.gov/vuln/detail/CVE-2025-55009
- https://github.com/workos/authkit-remix/commit/20102afc74bf3dd5150a975a098067fb406b90b6
- https://github.com/workos/authkit-remix
- https://github.com/workos/authkit-remix/releases/tag/v0.15.0
- https://osv.dev/vulnerability/CVE-2025-55009
- https://osv.dev/vulnerability/GHSA-v3gr-w9gf-23cx
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L- Weakness (CWE)
CWE-200- Platform
- npm
- Package
@workos-inc/authkit-remix- Disclosed
- 08.08.2025
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-v3gr-w9gf-23cx - CC BY 4.0
Vulnerability history: @workos-inc/authkit-remix
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 11.2024 08.2025
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Low 1
Disclosures per year
- 2024: 1
- 2025: 1
- 2026: 0
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The AuthKit Remix Library renders sensitive auth data in HTML this entry
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