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-2026-84458 Zammad: Account takeover via unverified email matching during SSO auto-link

Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, when the "Automatic account link on initial logon" setting is enabled, Zammad binds an incoming third-party SSO identity to an existing local account by matching the email address the identity provider reports,...

EUVD-2026-75936

The Booktics – Booking Calendar for Appointments and Service Businesses plugin for WordPress is vulnerable to unauthorized modification of data in all versions up to, and including, 1.0.23. This is due to the createorderpermission permission callback on the POST /wp-json/booktics/v1/orders REST...

CVE-2026-86117

Coolify (through version 4.3.17 ) is affected by an authentication bypass in its OAuth callback handler. The root cause is that the handler signs users into existing accounts based solely on email address matching , without verifying provider assertions or binding OAuth identities. An attacker ca...

EUVD-2026-71949

Coolify through 4.3.17 contains an authentication bypass vulnerability in the OAuth callback handler that signs users into existing accounts based solely on email address without verifying provider assertions or binding OAuth identities. Attackers can register a victim's email address on any...

CVE-2026-86117 Coolify through 4.3.17 OAuth Account Takeover via Unverified Email Matching

Coolify through 4.3.17 contains an authentication bypass vulnerability in the OAuth callback handler that signs users into existing accounts based solely on email address without verifying provider assertions or binding OAuth identities. Attackers can register a victim's email address on any...

CVE-2026-86117 Coolify through 4.3.17 OAuth Account Takeover via Unverified Email Matching

Coolify through 4.3.17 contains an authentication bypass vulnerability in the OAuth callback handler that signs users into existing accounts based solely on email address without verifying provider assertions or binding OAuth identities. Attackers can register a victim's email address on any...

CVE-2026-86117 Coolify through 4.3.17 OAuth Account Takeover via Unverified Email Matching

Coolify through 4.3.17 contains an authentication bypass vulnerability in the OAuth callback handler that signs users into existing accounts based solely on email address without verifying provider assertions or binding OAuth identities. Attackers can register a victim's email address on any...

PT-2026-86388

Coolify through 4.3.17 contains an authentication bypass vulnerability in the OAuth callback handler that signs users into existing accounts based solely on email address without verifying provider assertions or binding OAuth identities. Attackers can register a victim's email address on any...

GHSA-777C-2FXX-QR28 AshAuthentication vulnerable to OAuth2/OIDC account takeover via email-based user matching

Summary AshAuthentication's OAuth2 and OIDC family strategies matched the local user by email address rather than by the OpenID Connect iss/sub claim combination. A provider login presenting a victim's email including an unverified, reused, or emailverified: false account resolved to and signed i...

ANT-2026-7WJV60DR · supabase/auth · other

other medium Severity Claude medium · Security research firm - · Maintainer - Discovered by Claude Mythos Preview REPORT Anthropic's analysis of this finding, sealed at approval. ANT-2026-7WJV60DR: Manual identity linking enables account takeover via unverified email When...

CVE-2026-35511

The OAuth callback handler links incoming OAuth identities Google, GitHub, etc. to existing accounts matched by email address without verifying that the existing account's email was verified by its original owner. An attacker who pre-registers with a victim's email address without verifying it...

CVE-2026-73655 Trigger.dev: Account Takeover via Cross-Provider OAuth Email Matching in Google Login

Trigger.dev is a platform for building and deploying fully managed AI agents and workflows. Prior to 4.5.2, addGoogleStrategy in apps/webapp/app/services/googleAuth.server.ts passes a Google profile email to findOrCreateGoogleUser in apps/webapp/app/models/user.server.ts without requiring Google'...

CVE-2026-64665 Statamic: Account takeover via OAuth email matching without email-verification check

Statamic is a Laravel and Git powered content management system CMS. Prior to 5.74.1 and 6.24.0, when OAuth login was enabled with a provider that does not guarantee verified email addresses, an unauthenticated attacker could sign in as an existing user, potentially including a super admin, witho...

CVE-2026-64665 Statamic: Account takeover via OAuth email matching without email-verification check

Statamic is a Laravel and Git powered content management system CMS. Prior to 5.74.1 and 6.24.0, when OAuth login was enabled with a provider that does not guarantee verified email addresses, an unauthenticated attacker could sign in as an existing user, potentially including a super admin, witho...

SUSE CVE-2026-55075

Coder allows organizations to provision remote development environments via Terraform. Prior to versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2, two flaws in Coder's OIDC login chained into account takeover. Email-based user matching fell back to linking by email without checking for an existing link...

CVE-2026-55075 Coder vulnerable to OIDC account takeover via email-based user matching and email_verified bypass

Coder allows organizations to provision remote development environments via Terraform. Prior to versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2, two flaws in Coder's OIDC login chained into account takeover. Email-based user matching fell back to linking by email without checking for an existing link...

CVE-2026-55075

Coder’s OIDC login flaw leads to account takeover via email-based user matching and improper handling of email_verified. Before versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2, two issues exist: (1) email-based matching could link by email without confirming an existing link to a different IdP subjec...

CVE-2026-55075 Coder vulnerable to OIDC account takeover via email-based user matching and email_verified bypass

Coder allows organizations to provision remote development environments via Terraform. Prior to versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2, two flaws in Coder's OIDC login chained into account takeover. Email-based user matching fell back to linking by email without checking for an existing link...

CVE-2026-55075: Improper Authentication

Coder allows organizations to provision remote development environments via Terraform. Prior to versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2, two flaws in Coder's OIDC login chained into account takeover. Email-based user matching fell back to linking by email without checking for an existing link...