CVE-2026-81520 MongoDB Connector for BI Unbounded Authentication Negotiation Leading to Connection Exhaustion

A network-reachable client that has not yet authenticated can hold a MongoDB Connector for BI authentication session open indefinitely by beginning a SASL-based login exchange and then declining to complete it. Because the negotiation loop had no overall time bound and the read from the client ha...

CVE-2026-81520 MongoDB Connector for BI Unbounded Authentication Negotiation Leading to Connection Exhaustion

A network-reachable client that has not yet authenticated can hold a MongoDB Connector for BI authentication session open indefinitely by beginning a SASL-based login exchange and then declining to complete it. Because the negotiation loop had no overall time bound and the read from the client ha...

CVE-2026-81520

MongoDB Connector for BI is vulnerable to a denial-of-service condition caused by an unbounded SASL authentication negotiation loop . A network-reachable, unauthenticated client can initiate a SASL-based login exchange and then decline to complete it. Because the negotiation loop had no overall t...