CVE-2026-86522: Team-Alembic Ash Authentication

Medium severity, CVSS 6.3. EPSS: 0.7% chance of exploitation in the next 30 days.

Improper Output Neutralization for Logs vulnerability in team-alembic AshAuthentication allows an unauthenticated attacker to forge application log entries by submitting a password reset identity containing newlines or control characters. AshAuthentication.Strategy.Password.RequestPasswordReset.run/3 interpolates the identity argument, the email or username taken straight from the reset request, into its Logger.warning/1 heredocs without escaping, truncating or type-restricting it. The resource logged beside it is passed through inspect/1, which would have neutralized the value. A newline in the identity therefore ends the log record, and everything after it is written as a line of its own, so an attacker chooses the severity tag and the content of entries that appear to have come from the application. This issue affects ash_authentication: from 4.2.0 before 4.15.0 and from 5.0.0-rc.0 before 5.0.0-rc.14.

Affected products

• Team-Alembic Ash Authentication: from 4.2.0, before 4.15.0 (fixed in 4.15.0); from 5.0.0-rc.0, before 5.0.0-rc.14 (fixed in 5.0.0-rc.14)

Published 2026-09-17. Last modified 2026-09-18.