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CVE-2026-81632 (GCVE-0-2026-81632)

Vulnerability from cvelistv5 – Published: 2026-09-17 13:09 – Updated: 2026-09-17 18:29
VLAI
Title
Single-use sign-in token placed in a redirect query string in AshAuthenticationPhoenix
Summary
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.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 18:29 UTC
CWE
  • CWE-598 - Use of HTTP Request With Sensitive Query String
Assigner
Impacted products
Vendor Product Version CPE status
team-alembic ash_authentication_phoenix Affected: 1.7.0 , < 2.17.4 (semver)
Affected: 3.0.0-rc.0 , < 3.0.0-rc.11 (semver)
    cpe:2.3:a:team-alembic:ash_authentication_phoenix:*:*:*:*:*:*:*:*
Create a notification for this product.
team-alembic ash_authentication_phoenix Affected: 903f3a386e1aba2f7b070187ef6f31215a92bdfd , < * (git)
    cpe:2.3:a:team-alembic:ash_authentication_phoenix:*:*:*:*:*:*:*:*
Create a notification for this product.
team-alembic ash_authentication Affected: 3.10.5 , < 4.15.0 (semver)
Affected: 5.0.0-rc.0 , < 5.0.0-rc.14 (semver)
    cpe:2.3:a:team-alembic:ash_authentication:*:*:*:*:*:*:*:*
Create a notification for this product.
team-alembic ash_authentication Affected: eca8cadea0f1595ed2c10a0c177b1da9aa9e5269 , < * (git)
    cpe:2.3:a:team-alembic:ash_authentication:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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                "patch"
              ],
              "url": "https://github.com/team-alembic/ash_authentication/commit/8d8ddd25c69b669a92a701af74bff42e1aada998"
            }
          ],
          "source": {
            "discovery": "INTERNAL"
          },
          "title": "Single-use sign-in token placed in a redirect query string in AshAuthenticationPhoenix"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "assignerShortName": "EEF",
        "cveId": "CVE-2026-81632",
        "datePublished": "2026-09-17T13:09:31.601Z",
        "dateReserved": "2026-09-11T18:45:01.476Z",
        "dateUpdated": "2026-09-17T18:29:20.271Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Detection rules are retrieved from Rulezet.

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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


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