CVE-2026-9749
7.1
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| MongoDB | MongoDB Server | 8.3.0 < 8.3.3 | affected |
| MongoDB | MongoDB Server | 8.2.0 < 8.2.10 | affected |
| MongoDB | MongoDB Server | 8.0.0 < 8.0.24 | affected |
| MongoDB | MongoDB Server | 7.0.0 < 7.0.35 | affected |
Weaknesses
- CWE-617: CWE-617 Reachable assertion
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
References
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