CVE-2026-9749 - Using MaxKey() may crash the server
CVE ID :CVE-2026-9749
Published : June 9, 2026, 10:10 p.m. | 54 minutes ago
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.
Severity: 7.1 | HIGH
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Published : June 9, 2026, 10:10 p.m. | 54 minutes ago
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.
Severity: 7.1 | HIGH
Visit the link for more details, such as CVSS details, affected products, timeline, and more...