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CVE-2026-81632
Published:September 17, 2026
Updated:September 22, 2026
Use of HTTP Request With Sensitive Query String vulnerability in team-alembic AshAuthenticationPhoenix allows someone able to read access logs, proxy logs or browser history to recover a single-use sign-in token and authenticate as its owner. After a successful password sign-in, AshAuthentication.Phoenix.Components.Password.SignInForm builds the sign_in_with_token path with the freshly issued user.metadata.token as a query parameter and redirects the browser to it with a GET. The token therefore travels in the request line, where web servers, reverse proxies, request telemetry and the browser's own history record it, all of which outlive the request and are ordinarily less protected than session storage. The redirect destination is restricted to a local path, so this is not an open redirect; the exposure is the retention of a live credential. This issue affects ash_authentication_phoenix: from 1.7.0 before 2.17.4 and from 3.0.0-rc.0 before 3.0.0-rc.11; ash_authentication: from 3.10.5 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) >=v3.10.5 <v4.15.0
Fix Suggestion:
Update to version v4.15.0
https://github.com/team-alembic/ash_authentication_phoenix.git (GITHUB):
Affected version(s) =2.17.0 <2.17.4
Fix Suggestion:
Update to version 2.17.4
https://github.com/team-alembic/ash_authentication_phoenix.git (GITHUB):
Affected version(s) >=3.0.0-rc.3 <3.0.0-rc.11
Fix Suggestion:
Update to version 3.0.0-rc.11
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) >=3.10.5 <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
ash_authentication_phoenix (HEX):
Affected version(s) >=1.7.0 <2.17.4
Fix Suggestion:
Update to version 2.17.4
ash_authentication_phoenix (HEX):
Affected version(s) >=3.0.0-rc.0 <3.0.0-rc.11
Fix Suggestion:
Update to version 3.0.0-rc.11
Additional Notes
The description of this vulnerability differs from MITRE.
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CVSS v4
Base Score:
7.2
Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.1
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Use of HTTP Request With Sensitive Query String
EPSS
Base Score:
0.15