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                "id": "CVE-2026-49757",
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          "collectionURL": "https://repo.hex.pm",
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              "value": "Authentication Bypass by Spoofing vulnerability in team-alembic AshAuthentication allows account takeover of local users via OAuth2/OIDC sign-in.\u003cp\u003eAshAuthentication\u0027s OAuth2 and OIDC family strategies matched the local user by email address (an upsert on the email field, or a user-defined sign-in filter) rather than by the OpenID Connect \u003ctt\u003eiss\u003c/tt\u003e/\u003ctt\u003esub\u003c/tt\u003e claim combination. Per OpenID Connect Core \u00a75.7, only \u003ctt\u003eiss\u003c/tt\u003e/\u003ctt\u003esub\u003c/tt\u003e uniquely and stably identifies an end-user; other claims, including \u003ctt\u003eemail\u003c/tt\u003e, MUST NOT be used as unique identifiers.\u003c/p\u003e\u003cp\u003eA provider login presenting a victim\u0027s email, including an unverified email, a reused email, or an account with \u003ctt\u003eemail_verified: false\u003c/tt\u003e, resolved to and signed in as the victim\u0027s existing local account. An unauthenticated attacker who can register an account on any accepted OAuth provider with the victim\u0027s email (or who benefits from provider-side email reuse or reclamation) obtains the victim\u0027s full local privileges.\u003c/p\u003e\u003cp\u003eThe fix resolves users by the \u003ctt\u003e(strategy, sub)\u003c/tt\u003e identity stored in a user identity resource, and only links a new \u003ctt\u003esub\u003c/tt\u003e to an existing local account by email when the provider\u0027s \u003ctt\u003eemail_verified\u003c/tt\u003e claim is trusted (\u003ctt\u003etrust_email_verified?\u003c/tt\u003e).\u003c/p\u003e\u003cp\u003eThis issue affects ash_authentication from 0.1.0 before 4.14.0 and from 5.0.0-rc.0 before 5.0.0-rc.10.\u003c/p\u003e"
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          "value": "Authentication Bypass by Spoofing vulnerability in team-alembic AshAuthentication allows account takeover of local users via OAuth2/OIDC sign-in.\n\nAshAuthentication\u0027s OAuth2 and OIDC family strategies matched the local user by email address (an upsert on the email field, or a user-defined sign-in filter) rather than by the OpenID Connect iss/sub claim combination. Per OpenID Connect Core \u00a75.7, only iss/sub uniquely and stably identifies an end-user; other claims, including email, MUST NOT be used as unique identifiers.\n\nA provider login presenting a victim\u0027s email, including an unverified email, a reused email, or an account with email_verified: false, resolved to and signed in as the victim\u0027s existing local account. An unauthenticated attacker who can register an account on any accepted OAuth provider with the victim\u0027s email (or who benefits from provider-side email reuse or reclamation) obtains the victim\u0027s full local privileges.\n\nThe fix resolves users by the (strategy, sub) identity stored in a user identity resource, and only links a new sub to an existing local account by email when the provider\u0027s email_verified claim is trusted (trust_email_verified?).\n\nThis issue affects ash_authentication from 0.1.0 before 4.14.0 and from 5.0.0-rc.0 before 5.0.0-rc.10."
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              "value": "CAPEC-21 Exploitation of Trusted Identifiers"
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      "source": {
        "discovery": "EXTERNAL"
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      "title": "OAuth2/OIDC account takeover in AshAuthentication via email-based user matching",
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                "id": "CVE-2025-32782",
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                "timestamp": "2025-04-16T14:07:20.590187Z",
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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        "title": "CISA ADP Vulnrichment"
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              "version": "\u003c 4.7.0"
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      "descriptions": [
        {
          "lang": "en",
          "value": "Ash Authentication provides authentication for the Ash framework. The confirmation flow for account creation currently uses a GET request triggered by clicking a link sent via email. Some email clients and security tools (e.g., Outlook, virus scanners, and email previewers) may automatically follow these links, unintentionally confirming the account. This allows an attacker to register an account using another user\u2019s email and potentially have it auto-confirmed by the victim\u2019s email client. This does not allow attackers to take over or access existing accounts or private data. It is limited to account confirmation of new accounts only. This vulnerability is fixed in 4.7.0."
        }
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            "attackComplexity": "LOW",
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        "advisory": "GHSA-3988-q8q7-p787",
        "discovery": "UNKNOWN"
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      "title": "Ash Authentication email link auto-click account confirmation vulnerability"
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                "id": "CVE-2025-25202",
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                  },
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          "value": "Ash Authentication is an authentication framework for Elixir applications. Applications which have been bootstrapped by the igniter installer present since AshAuthentication v4.1.0 and who have used the magic link strategy _or_ are manually revoking tokens are affected by revoked tokens being allowed to verify as valid. Unless one hase implemented any kind of custom token revocation feature in your application, then one will not be affected. The impact here for users using builtin functionality is that magic link tokens are reusable until they expire. With that said, magic link tokens are only valid for 10 minutes, so the surface area for abuse is extremely low here. The flaw is patched in version 4.4.9. Additionally a compile time warning is shown to users with remediation instructions if they upgrade. 4.4.9 ships with an upgrader, so those who use `mix igniter.upgrade ash_authentication` will have the necessary patch applied. Otherwise, one may run the upgrader manually as described in the error message. As a workaround, delete the generated `:revoked?` generic action in the token resource. This will cause it to use the one internal to Ash Authentication which has always been correct. Alternatively, manually make the changes that are included in the patch."
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        "advisory": "GHSA-qrm9-f75w-hg4c",
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      "title": "Ash Authentication has flawed token revocation checking logic in actions generated by `mix ash_authentication.install`"
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