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CVE-2026-86522
Published:September 17, 2026
Updated:September 22, 2026
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 Packages
https://github.com/team-alembic/ash_authentication.git (GITHUB):
Affected version(s) >=v4.2.0 <v4.15.0
Fix Suggestion:
Update to version v4.15.0
https://github.com/team-alembic/ash_authentication.git (GITHUB):
Affected version(s) >=v5.0.0-rc.0 <v5.0.0-rc.14
Fix Suggestion:
Update to version v5.0.0-rc.14
ash_authentication (HEX):
Affected version(s) >=4.2.0 <4.15.0
Fix Suggestion:
Update to version 4.15.0
ash_authentication (HEX):
Affected version(s) >=5.0.0-rc.0 <5.0.0-rc.14
Fix Suggestion:
Update to version 5.0.0-rc.14
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CVSS v4
Base Score:
6.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
LOW
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Improper Output Neutralization for Logs
EPSS
Base Score:
0.53