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CVE-2026-81520 is an uncontrolled resource-consumption vulnerability in MongoDB Connector for BI's SASL authentication negotiation. An unauthenticated network client can initiate a SASL login exchange and leave it incomplete. The affected negotiation loop lacks an overall timeout and client reads lack deadlines, allowing the session to remain open indefinitely. Each stalled session retains a worker, client connection slot, and associated backend database connections until the connector process is restarted.
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No public exploit code observed for this vulnerability.
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7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A denial-of-service vulnerability in MongoDB Connector for BI where an unauthenticated network client can initiate but not complete a SASL authentication exchange, indefinitely retaining worker, connection-slot, and backend database resources. Repeated connections can exhaust configured capacity and block legitimate sessions until restart.
A high-severity, remotely exploitable denial-of-service vulnerability in MongoDB Connector for BI. An unauthenticated network client can initiate but not complete a SASL authentication exchange, indefinitely retaining workers, connection slots, and backend database connections until restart; repeated requests can exhaust capacity and deny legitimate connections.
A MongoDB Connector for BI SASL authorization-negotiation vulnerability addressed by adding a timeout.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.