CyberRota Analysis
This is a medium severity vulnerability with a CVSS score of 6.5. It affects Exchange.
CVE
CVE-2026-9749
Severity
MEDIUM
CVSS
6.5
EPSS
0.27%
Exchange
Original NVD Description
This issue can occur when running an aggregation pipeline that uses the internal $exchange stage configured with key-range partitioning and order-preserving delivery. If a single key range produces enough documents to fill its exchange buffer (that is, many results are routed to the same consumer), the server reaches the code path where a full per-consumer buffer is detected but the internal "high watermark" for that key range is not updated as intended.
Related CVEs
Other vulnerabilities affecting the same vendor(s)