Auth0 Symfony SDK has Improper Audience Validation via Auth0-PHP SDK
Key facts
- Attack vector
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- Privileges required
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- User interaction
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- Attack complexity
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- Impact type
- Security bypass
- Confidentiality · integrity · availability
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- Fix status
- Fixed
No CVSS vector from any source. Fix status from GitHub. Impact type from CWE-345.
Summary
### Description In applications built with the Auth0-PHP SDK, the audience validation in access tokens is performed improperly. Without proper validation, affected applications may accept ID tokens as Access tokens. ### Affected product and versions Projects are affected if they meet the following preconditions: - Applications using the Auth0 Symfony SDK with versions between 5.0.0 and 5.5.0 - Auth0 Symfony SDK uses the Auth0-PHP SDK with versions between 8.0.0 and 8.17.0. ### Resolution Upgrade Auth0/symfony to version 5.6.0 or greater. ### Acknowledgement Okta would like to thank Jafar Sadiq (iaf4r) for their discovery and responsible disclosure.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | auth0/symfony (Packagist) | 5.0.0 to before 5.6.0 | 5.6.0 | Patch available | GHSA-f3r2-88mq-9v4g |
- auth0/symfony (Packagist) Vendor— Affected 5.0.0 to before 5.6.0 Fixed in 5.6.0 Patch available GHSA-f3r2-88mq-9v4g
Remediation
- Fix · GHSA-f3r2-88mq-9v4g auth0/symfony (Packagist) Fixed in 5.6.0 Advisory →
Timeline
- 2026-10-03 Threatist record created from GHSA-f3r2-88mq-9v4g
References
Sources
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