CVE-2026-93637 [LOW] – An authentication rate-limit bypass in Zimbra Collaboration Suite 10.1.0 through 10.1.21 a

An authentication rate-limit bypass in Zimbra Collaboration Suite 10.1.0 through 10.1.21 allows unauthenticated attackers to make repeated password guesses through GraphQL without incrementing Zimbra’s source-IP failure counter. GraphQL aliases allow multiple authentication attempts in one HTTP request.