What’s Vulnerable › Vulnerabilities
CVE-2026-9753: Server crash via malformed binary diff passed to $_internalApplyOplogUpdate.
- Severity: high (CVSS 8.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-06-09 · updated 2026-07-23
- Weakness: CWE-1287
Description
The $_internalApplyOplogUpdate aggregation pipeline stage can be used to execute a document diff containing a malformed binary diff to return memory out-of-bounds or crash the server. $_internalApplyOplogUpdate can be executed by any authenticated user with access to the aggregate command.
Affected products
- MongoDB: before 7.0.35; from 8.0.0 before 8.0.24; from 8.2.0 before 8.2.10; from 8.3.0 before 8.3.3 — fixed in 7.0.35, 8.0.24, 8.2.10, 8.3.3
How to fix
Upgrade to a fixed version: MongoDB 7.0.35, 8.0.24, 8.2.10, 8.3.3. Check the vendor advisory for mitigations.
References
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