Auth0 Account Link Extension JWT Invalid Signature Validation
Priority LOW 37CWE-290Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-290.
Summary
Auth0 Account Link Extension is an extension aimed to help link accounts easily. Versions 2.3.4 to 2.6.6 do not verify the signature of the provided JWT. This allows the user the ability to supply a forged token and the potential to access user information without proper authorization. This issue has been patched in versions 2.6.7, 2.7.0, and 3.0.0. It is recommended to upgrade to version 3.0.0 or greater.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00384 32nd percentileScored 2026-11-07
Fix Fixed auth0-account-link-extension (auth0-extensions): 2.6.7
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| auth0-extensions | auth0-account-link-extension | 2.3.4 to before 2.6.7 | 2.6.7 | Patch available | CNA |
- auth0-account-link-extension Vendorauth0-extensions Affected 2.3.4 to before 2.6.7 Fixed in 2.6.7 Patch available CNA
Remediation
- Fix · CNA auth0-account-link-extension (auth0-extensions) Fixed in 2.6.7
Timeline
- 2026-10-02 Threatist record created from CVE-2025-46345
References
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences