CVE-2026-18692: CWE-416: Use After Free in MongoDB MongoDB Server
An issue in MongoDB Server's handling of timeseries bucket lifecycle could allow an authenticated user with write privileges to cause an internal reference to be used after the underlying memory has been freed. Subsequent operations could then result in a server crash or, potentially, execution of unintended code.
AI Analysis
Technical Summary
This vulnerability involves improper handling of memory in MongoDB Server 8.3.0 when managing timeseries bucket lifecycle. Specifically, an internal reference may be used after the underlying memory has been freed, leading to a use-after-free condition. Exploitation requires an authenticated user with write privileges. The impact includes possible server crashes and potential execution of unintended code. The CVSS 4.0 score is 7.7, indicating high severity. There is no vendor advisory or patch available at this time, and no known exploits in the wild have been reported.
Potential Impact
An attacker with authenticated write access to MongoDB Server 8.3.0 could exploit this vulnerability to cause a denial of service via server crash or potentially execute arbitrary code on the server. This could disrupt database availability or compromise server integrity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict write privileges to trusted users only and monitor for unusual behavior related to timeseries data operations.
CVE-2026-18692: CWE-416: Use After Free in MongoDB MongoDB Server
Description
An issue in MongoDB Server's handling of timeseries bucket lifecycle could allow an authenticated user with write privileges to cause an internal reference to be used after the underlying memory has been freed. Subsequent operations could then result in a server crash or, potentially, execution of unintended code.
CVSS v4.0
Score 7.7high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves improper handling of memory in MongoDB Server 8.3.0 when managing timeseries bucket lifecycle. Specifically, an internal reference may be used after the underlying memory has been freed, leading to a use-after-free condition. Exploitation requires an authenticated user with write privileges. The impact includes possible server crashes and potential execution of unintended code. The CVSS 4.0 score is 7.7, indicating high severity. There is no vendor advisory or patch available at this time, and no known exploits in the wild have been reported.
Potential Impact
An attacker with authenticated write access to MongoDB Server 8.3.0 could exploit this vulnerability to cause a denial of service via server crash or potentially execute arbitrary code on the server. This could disrupt database availability or compromise server integrity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict write privileges to trusted users only and monitor for unusual behavior related to timeseries data operations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mongodb
- Date Reserved
- 2026-08-03T15:53:26.067Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a7b7422bf8831d539467f75
Added to database: 08/11/2026, 19:12:34 UTC
Last enriched: 08/11/2026, 19:28:36 UTC
Last updated: 08/12/2026, 01:03:09 UTC
Views: 4
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