CVE-2026-82059
An internal aggregation expression in MongoDB Server was incorrectly registered as accessible to any authenticated user rather than being restricted to internal cluster operations. By crafting a malformed index specification within this expression, an authenticated user with read-only privileges could trigger an assertion failure in the index key generation code path. In certain build configurations, this assertion failure results in termination of the mongod process, causing a denial of service to all connected clients.
Scoring
- Severity
- MEDIUM
- CVSS base score
- 6
- CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- EPSS probability
- 0.26%
- CWE
- CWE-617
- Published
- 2026-09-08
- Last modified
- 2026-09-08
Affected products
- MongoDB MongoDB Server
- MongoDB MongoDB Server
- MongoDB MongoDB Server
Weakness type
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