CVE-2026-107370 Auth0 CVE debrief

Who should care

Defenders responsible for auth0-lock configurations, especially those using Active Directory logins, should assess exposure and verify remediation. They should also review configurations and monitor for suspicious activity. This includes operators, platform administrators, vulnerability management teams, and security teams.

Why it matters

Defenders should prioritize verifying and remediating auth0-lock usage in Active Directory login contexts due to potential credential exposure and required configuration reviews.

• Potential credential exposure through query string parameters
• Required verification of auth0-lock versions and configurations
• Necessary review of Active Directory login setups

Technical summary

The auth0-lock library initiates authentication transactions with a GET request instead of a POST request when a username for an Active Directory connection is a domain without a local part. This results in user-submitted form data being appended to the URL as query string parameters. Defenders should prioritize verifying and remediating auth0-lock usage, especially in Active Directory login contexts, to prevent potential credential exposure. Affected deployments should be identified, and configurations reviewed for potential exposure.

Defensive priority

Defenders should prioritize verifying and remediating auth0-lock usage, especially in Active Directory login contexts, to prevent potential credential exposure.

Recommended defensive actions

• Verify auth0-lock version and update to a non-affected version if possible
• Review Active Directory login configurations for auth0-lock
• Monitor for suspicious login activity
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• technicalSummary

Evidence notes

The CVE record and source item provide details on the improper request handling vulnerability in auth0-lock. Specific version details and remediation steps are limited. Defenders should verify auth0-lock versions, review configurations, and monitor for suspicious activity. Evidence is based on CVE Program and supplemental source references.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.