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CVE-2026-86522

Log injection via an unescaped password reset identity in AshAuthentication

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 4.15.0, 5.0.0-rc.14
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: partial

Summary

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: partial

  3. Record last updated

Affected versions

  • ash_authentication

    From 4.2.0 · fixed in 4.15.0; From 5.0.0-rc.0 · fixed in 5.0.0-rc.14

  • team-alembic/ash_authentication

    Version range not reported

References 6

GitHub · team-alembic/ash_authentication

cna.erlef.org

osv.dev