team-alembic ash_authentication_phoenix/ash_authentication SignInForm information disclosure

Summaryinfo

A vulnerability identified as problematic has been detected in team-alembic ash_authentication_phoenix and ash_authentication. The affected element is an unknown function of the component SignInForm. Performing a manipulation results in information disclosure. This vulnerability is identified as CVE-2026-81632. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in team-alembic ash_authentication_phoenix and ash_authentication (affected version not known). It has been classified as problematic. This affects some unknown functionality of the component SignInForm. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-81632 since 09/11/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• team-alembic

Name

• ash_authentication
• ash_authentication_phoenix

Website

• Product: https://github.com/team-alembic/ash_authentication_phoenix/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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