An issue in MongoDB Server's query execution engine could allow an authenticated user with read and write privileges to cause an internal reference… (CVE-2026-18711)
CVE-2026-18711 is a vulnerability in MongoDB Server's query execution engine affecting authenticated users with read and write privileges. It involves a use-after-free condition when running certain queries against time-series collections, which can lead to a server crash or disclosure of freed memory contents within query results. This vulnerability has a high severity rating with a CVSS score of 7.1.
AI Analysis
Technical Summary
This vulnerability in MongoDB Server arises from a use-after-free issue in the query execution engine when processing specific queries on time-series collections. An authenticated user with read and write privileges can trigger this flaw, potentially causing the server to crash or leak contents of freed memory through query results. The flaw is identified as CWE-416 (Use After Free). No patch or remediation information is provided in the available data, and no known exploits are reported in the wild.
Potential Impact
An attacker with authenticated read and write access to MongoDB can exploit this vulnerability to cause a denial of service by crashing the server or potentially disclose sensitive data from freed memory regions. This can impact the confidentiality and availability of the database service.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to trusted users only and monitor for unusual query activity targeting time-series collections.
An issue in MongoDB Server's query execution engine could allow an authenticated user with read and write privileges to cause an internal reference… (CVE-2026-18711)
Description
CVE-2026-18711 is a vulnerability in MongoDB Server's query execution engine affecting authenticated users with read and write privileges. It involves a use-after-free condition when running certain queries against time-series collections, which can lead to a server crash or disclosure of freed memory contents within query results. This vulnerability has a high severity rating with a CVSS score of 7.1.
CVSS v3.1
Score 7.1high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in MongoDB Server arises from a use-after-free issue in the query execution engine when processing specific queries on time-series collections. An authenticated user with read and write privileges can trigger this flaw, potentially causing the server to crash or leak contents of freed memory through query results. The flaw is identified as CWE-416 (Use After Free). No patch or remediation information is provided in the available data, and no known exploits are reported in the wild.
Potential Impact
An attacker with authenticated read and write access to MongoDB can exploit this vulnerability to cause a denial of service by crashing the server or potentially disclose sensitive data from freed memory regions. This can impact the confidentiality and availability of the database service.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to trusted users only and monitor for unusual query activity targeting time-series collections.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-xv7q-6jr5-mw96
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-18711"]
- Ecosystems
- []
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a7c9b70bf8831d539ce030e
Added to database: 08/12/2026, 16:12:32 UTC
Last enriched: 08/12/2026, 17:25:43 UTC
Last updated: 08/13/2026, 02:41:00 UTC
Views: 3
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.