CVE-2026-84685: Exposure of Data Element to Wrong Session in Auth0 react-native-auth0
Description
The react-native-auth0 SDK's web platform implementation does not scope its in-memory token cache to individual user sessions when operating in a server-side rendering (SSR) environment where module state persists across HTTP requests. Under the listed preconditions, tokens cached in module memory can be retrieved across subsequent requests processed by the same server runtime.
CVSS v3.1
Score 6.5medium
Affected software
Auth0
react-native-auth0
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The react-native-auth0 SDK does not isolate its in-memory token cache by user session when used in SSR environments where module state persists across requests. As a result, tokens cached in memory during one user's session can be retrieved by subsequent requests processed by the same server runtime, leading to exposure of tokens to unauthorized sessions. This affects versions 5.0.0 and all versions from 5.0.0 up to but not including 5.11.1.
Potential Impact
The vulnerability allows exposure of authentication tokens to incorrect user sessions in SSR environments, which can lead to unauthorized access to user data or services. The CVSS score of 6.5 reflects a medium severity with high confidentiality impact, low integrity impact, and no availability impact. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid using the react-native-auth0 SDK in SSR environments where module state persists across requests or implement custom session scoping for token caches to prevent cross-session token leakage.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Okta
- Date Reserved
- 2026-09-01T22:41:00.184Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aa07239acd9273b4931f786
Added to database: 09/08/2026, 20:38:17 UTC
Last enriched: 09/16/2026, 01:50:43 UTC
Last updated: 10/23/2026, 15:10:15 UTC
Views: 125
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