CVE-2026-18693
Last modified
CVE-2026-18693 is a high-severity vulnerability rated 7.6/10 on the CVSS scale. An issue in MongoDB Server's handling of timeseries collections could allow an authenticated user with write privileges to cause an internal data structure to become inconsistent through certain document insertions. A subsequent insert into the affected bucket could then result in the server accessing memory outside its intended bounds, potentially causing a server crash (denial of service), exposure of limited memory contents, or memory corruption.. EPSS estimates a 0.23% chance of exploitation in the next 30 days.
Description
An issue in MongoDB Server's handling of timeseries collections could allow an authenticated user with write privileges to cause an internal data structure to become inconsistent through certain document insertions. A subsequent insert into the affected bucket could then result in the server accessing memory outside its intended bounds, potentially causing a server crash (denial of service), exposure of limited memory contents, or memory corruption.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Mongodb | Mongodb | >= 7.0.0, < 7.0.40 | — |
| Mongodb | Mongodb | >= 8.0.0, < 8.0.29 | — |
| Mongodb | Mongodb | >= 8.2.0, <= 8.2.12 | — |
| Mongodb | Mongodb | >= 8.3.0, < 8.3.8 | — |
| Mongodb | Mongodb | 9.0.0 | Alpha0 |
| Mongodb | Mongodb | 9.1.0 | Alpha0 |
References
- https://jira.mongodb.org/browse/SERVER-129994Vendor Advisory, Issue Tracking
Timeline
- Published
- Last Modified
- Status
- Analyzed
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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