ash-authentication-oauth2-oidc-account-takeover-cve-2026-49757-email-based-user-matching

CVE-2026-49757 — AshAuthentication OAuth2/OIDC Account Takeover Proof of Concept for CVE-2026-49757 — a critical vulnerability in AshAuthentication where OAuth2/OIDC callbacks resolved to local user accounts by email address instead of the strategy, sub identity pair, allowing unauthenticated...

CVE-2026-88952

Improper Authentication vulnerability in team-alembic AshAuthentication allows an attacker to be signed in as another user by linking an OAuth2 identity to an account that is not theirs. AshAuthentication.Strategy.OAuth2.UserResolver.resolve/3 matches an existing account using the register action...

CVE-2026-86522

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...

CVE-2026-85500

Authentication Bypass by Primary Weakness vulnerability in team-alembic AshAuthentication allows an unconfirmed user to obtain a session, defeating a mandatory email confirmation requirement. AshAuthentication.Strategy.Password.Actions.checkuser/2 decides whether the attribute named by...

CVE-2026-86533

Insufficient Session Expiration vulnerability in team-alembic AshAuthentication and AshAuthentication Phoenix allows a revoked session to remain fully authenticated. A resource configured with sessionidentifier :jti and requiretokenpresenceforauthentication? disabled stores its session value as :...

CVE-2026-82761

Time-of-check Time-of-use TOCTOU Race Condition vulnerability in team-alembic AshAuthentication allows an attacker holding a leaked magic link to replay its single-use token and authenticate as the target subject. A magic link configured with singleusetoken?, which is the default, is meant to be...

CVE-2026-82759

Use of a One-Way Hash with a Predictable Salt vulnerability in team-alembic AshAuthentication allows readers of the audit store to recover the client IP addresses that the audit log add-on's :hash privacy mode is meant to pseudonymise. AshAuthentication.AddOn.AuditLog.IpPrivacy.haship/1 computes ...

CVE-2026-82760

Inefficient Algorithmic Complexity vulnerability in team-alembic AshAuthentication allows an unauthenticated attacker to exhaust CPU and memory via an oversized base62 segment in a submitted API key. AshAuthentication.Base.decode62/1 in lib/ashauthentication/base.ex splits its argument into one...

CVE-2026-81637

Insufficient Session Expiration vulnerability in team-alembic AshAuthentication allows an attacker who obtains a victim's OAuth2 state value to replay the callback and sign that victim into an attacker-controlled account. AshAuthentication.Strategy.OAuth2.Plug.callback/2 clears the stored...

CVE-2026-82723

Insertion of Sensitive Information into Log File vulnerability in team-alembic AshAuthentication allows disclosure of user password digests to readers of the audit store. The auditlog add-on builds each entry's extradata in AshAuthentication.AddOn.AuditLog.Auditor.buildextradata/4, which takes...

CVE-2026-78223

Improper Verification of Cryptographic Signature vulnerability in team-alembic AshAuthentication allows a caller of the token revocation action to neutralise a revocation or write arbitrary rows into the token resource. AshAuthentication.TokenResource.RevokeTokenChange.change/3 reads the :token...

CVE-2026-88952 OAuth2 sign-in attached to an existing account without an email comparison in AshAuthentication

Improper Authentication vulnerability in team-alembic AshAuthentication allows an attacker to be signed in as another user by linking an OAuth2 identity to an account that is not theirs. AshAuthentication.Strategy.OAuth2.UserResolver.resolve/3 matches an existing account using the register action...

CVE-2026-88952

AshAuthentication (team-alembic, an Elixir authentication library) contains an improper authentication flaw in its OAuth2 sign-in flow. The UserResolver.resolve/3 function matches an existing account via upsert_identity keys but gates the link solely on the provider's email_verified boolean, neve...

EEF-CVE-2026-88952 OAuth2 sign-in attached to an existing account without an email comparison in AshAuthentication

Summary Improper Authentication vulnerability in team-alembic AshAuthentication allows an attacker to be signed in as another user by linking an OAuth2 identity to an account that is not theirs. AshAuthentication.Strategy.OAuth2.UserResolver.resolve/3 matches an existing account using the registe...

CVE-2026-88952 OAuth2 sign-in attached to an existing account without an email comparison in AshAuthentication

Improper Authentication vulnerability in team-alembic AshAuthentication allows an attacker to be signed in as another user by linking an OAuth2 identity to an account that is not theirs. AshAuthentication.Strategy.OAuth2.UserResolver.resolve/3 matches an existing account using the register action...

CVE-2026-85500 `require_confirmed_with` is not enforced on the action and fails open on an unreadable attribute in AshAuthentication

Authentication Bypass by Primary Weakness vulnerability in team-alembic AshAuthentication allows an unconfirmed user to obtain a session, defeating a mandatory email confirmation requirement. AshAuthentication.Strategy.Password.Actions.checkuser/2 decides whether the attribute named by...

CVE-2026-85500

This is an authentication bypass in AshAuthentication (team-alembic, Elixir), rated CVSS 9.1 CRITICAL . The require_confirmed_with check in check_user/2 uses is_nil(Map.get(user, value)); when the attribute is not selected or hidden by a field policy, Map.get/2 returns %Ash.NotLoaded{} or %Ash.Fo...

EUVD-2026-81487

Authentication Bypass by Primary Weakness vulnerability in team-alembic AshAuthentication allows an unconfirmed user to obtain a session, defeating a mandatory email confirmation requirement. AshAuthentication.Strategy.Password.Actions.checkuser/2 decides whether the attribute named by...

CVE-2026-85500 `require_confirmed_with` is not enforced on the action and fails open on an unreadable attribute in AshAuthentication

Authentication Bypass by Primary Weakness vulnerability in team-alembic AshAuthentication allows an unconfirmed user to obtain a session, defeating a mandatory email confirmation requirement. AshAuthentication.Strategy.Password.Actions.checkuser/2 decides whether the attribute named by...

EEF-CVE-2026-85500 `require_confirmed_with` is not enforced on the action and fails open on an unreadable attribute in AshAuthentication

Summary Authentication Bypass by Primary Weakness vulnerability in team-alembic AshAuthentication allows an unconfirmed user to obtain a session, defeating a mandatory email confirmation requirement. AshAuthentication.Strategy.Password.Actions.checkuser/2 decides whether the attribute named by...