Reachable Assertion Affecting mongodb package, versions [7.0.0-alpha,7.0.35)[8.0.0-alpha,8.0.24)[8.2.0-alpha,8.2.10)[8.3.0-alpha0,8.3.3)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published28 Jun 2026
- disclosed9 Jun 2026
- creditUnknown
Introduced: 9 Jun 2026
CVE-2026-9749 (opens in a new tab)How to fix?
Upgrade mongodb to version 7.0.35, 8.0.24, 8.2.10, 8.3.3 or higher.
Overview
Affected versions of this package are vulnerable to Reachable Assertion in the aggregation pipeline when the internal $exchange stage is configured with key-range partitioning and order-preserving delivery. An attacker can cause the server to crash by filling the exchange buffer for a single key range, which triggers a code path where the per-consumer buffer is full but the internal high watermark is not updated as intended.