{"@context":"https://openvex.dev/ns/v0.2.0","@id":"https://database.harborguard.co/cve/CVE-2026-49757/vex.json","author":"HarborGuard Database","role":"Document Creator","timestamp":"2026-06-15T12:35:41.459Z","version":1,"tooling":"HarborGuard Database (https://database.harborguard.co)","statements":[{"vulnerability":{"name":"CVE-2026-49757","@id":"https://www.cve.org/CVERecord?id=CVE-2026-49757","description":"Authentication Bypass by Spoofing vulnerability in team-alembic AshAuthentication allows account takeover of local users via OAuth2/OIDC sign-in.\n\nAshAuthentication's 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 §5.7, only iss/sub uniquely and stably identifies an end-user; other claims, including email, MUST NOT be use"},"products":[{"@id":"cpe:2.3:a:team-alembic:ash_authentication:*:*:*:*:*:*:*:*","identifiers":{"cpe23":"cpe:2.3:a:team-alembic:ash_authentication:*:*:*:*:*:*:*:*"}}],"status":"affected","action_statement":"Update to a fixed version: *, 4.14.0, 5.0.0-rc.10.","timestamp":"2026-06-15T12:35:41.459Z"}]}