CVE-2026-82059: CWE-617: Reachable Assertion in MongoDB MongoDB Server
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.
AI Analysis
Technical Summary
This vulnerability arises from an internal aggregation expression in MongoDB Server that was incorrectly registered as accessible to any authenticated user rather than being limited to internal cluster operations. By exploiting this, an authenticated user with read-only privileges can submit a malformed index specification that triggers an assertion failure in the index key generation path. Depending on the build configuration, this assertion failure can cause the mongod process to terminate unexpectedly, leading to denial of service for all clients connected to the server. The affected versions explicitly include MongoDB Server versions 7.0.0, 8.0.0, and 8.3.0. The CVSS 4.0 base score is 6.0, indicating medium severity.
Potential Impact
An authenticated user with read-only privileges can cause the mongod process to terminate by triggering an assertion failure, resulting in denial of service to all connected clients. There is no indication of data breach or privilege escalation. The impact is limited to service availability disruption.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Until a patch is available, restrict authenticated user privileges carefully and monitor for unusual process terminations.
CVE-2026-82059: CWE-617: Reachable Assertion in MongoDB MongoDB Server
Description
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 v4.0
Score 6.0medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability arises from an internal aggregation expression in MongoDB Server that was incorrectly registered as accessible to any authenticated user rather than being limited to internal cluster operations. By exploiting this, an authenticated user with read-only privileges can submit a malformed index specification that triggers an assertion failure in the index key generation path. Depending on the build configuration, this assertion failure can cause the mongod process to terminate unexpectedly, leading to denial of service for all clients connected to the server. The affected versions explicitly include MongoDB Server versions 7.0.0, 8.0.0, and 8.3.0. The CVSS 4.0 base score is 6.0, indicating medium severity.
Potential Impact
An authenticated user with read-only privileges can cause the mongod process to terminate by triggering an assertion failure, resulting in denial of service to all connected clients. There is no indication of data breach or privilege escalation. The impact is limited to service availability disruption.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Until a patch is available, restrict authenticated user privileges carefully and monitor for unusual process terminations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mongodb
- Date Reserved
- 2026-08-27T22:51:40.217Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6aa03a25acd9273b49ec3631
Added to database: 09/08/2026, 16:39:01 UTC
Last enriched: 09/08/2026, 16:53:18 UTC
Last updated: 09/09/2026, 00:22:58 UTC
Views: 9
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