CVE-2026-82059

medium

An internal aggregation expression in MongoDB Server was incorrectly registered as accessible to any authenticated user rather than being restricted to interna…

Vendor / product: Mongodb — mongodb

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.

CVSS

6.5

6.5 (CVSS v3.1)

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Severity source: NVD CVSS v3.1 (nvd@nist.gov)

Timeline (UTC)

Published: 2026-09-08 17:18

Modified: 2026-09-16 20:36

NVD status: Analyzed

Last synced 2 days ago

Verified against the source API 2026-10-27 06:51 UTC

Exploitation

Not listed in CISA KEV (as of last catalog sync)

Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

mongodb / mongodb ≥7.0.0 <7.0.41, ≥8.0.0 <8.0.30, ≥8.3.0 <8.3.9

Weakness classification (CWE)

CWE-617

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

Vendor advisory: https://jira.mongodb.org/browse/SERVER-130571

References

https://jira.mongodb.org/browse/SERVER-130571 cna@mongodb.com

Data sources

NVD CVE API 2.0 — fetched 2026-10-27 06:51 UTC · record ↗

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CVE-2026-82059

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Weakness classification (CWE)

Mitigation & advisories

References

Data sources

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