CVE-2026-85500 team-alembic CVE debrief

Who should care

Defenders using the AshAuthentication library should assess their exposure and verify their library version. They should also review and update configurations to ensure email confirmation requirements are enforced.

Why it matters

CVE-2026-85500 is a critical vulnerability in the AshAuthentication library that allows an unconfirmed user to obtain a session, bypassing the mandatory email confirmation requirement. Defenders should prioritize verifying their library version and applying patches or workarounds to prevent exploitation.

• Defenders need to verify AshAuthentication library versions and apply patches or workarounds to prevent exploitation.
• Configurations may need to be reviewed and updated to ensure email confirmation requirements are enforced.
• Potential exploitation attempts should be monitored.

Technical summary

The AshAuthentication library is vulnerable to an Authentication Bypass by Primary Weakness. An unconfirmed user can obtain a session, bypassing the mandatory email confirmation requirement. This is due to the AshAuthentication.Strategy.Password.Actions.check_user/2 function not properly checking the require_confirmed_with attribute. The vulnerability arises from the function's improper handling of the attribute when it is not selected on the loaded record or when a field policy denies it for the current actor. This issue affects ash_authentication versions from 4.3.8 before 4.15.0 and from 5.0.0-rc.0 before 5.0.0-rc.14. Defenders should prioritize verifying their AshAuthentication library version and applying

Defensive priority

Defenders should prioritize verifying their AshAuthentication library version and applying patches or workarounds to prevent exploitation.

Recommended defensive actions

• Verify AshAuthentication library version and apply patches or workarounds
• Review and update configurations to ensure email confirmation requirements are enforced
• Monitor for potential exploitation attempts
• Perform vulnerability scanning to identify potentially exposed systems
• Review system logs for suspicious activity
• Implement additional monitoring and detection controls
• Conduct a thorough review of system configurations and user accounts

Evidence notes

The vulnerability details are based on the CVE record and source references provided. However, the exact scope of affected configurations and potential impact requires further verification from official sources.

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.