CVE-2026-9740
MongoDB has fixed multiple vulnerabilities in MongoDB Server. The vulnerabilities affect various components of MongoDB Server. A vulnerability in the logging mechanisms can lead to full authentication credentials, including sensitive credentials, being logged in server logs without redaction during SASL authentication sessions. Another vulnerability in BSON validation causes a crash of the mongod process due to uncontrolled mutual recursion during the validation of nested binary data, resulting in a denial-of-service.
CSIRTS triage
- What
- Vulnerabilities in logging and BSON validation can lead to credential exposure and denial of service.
- Who is affected
- Users of MongoDB Server.
- Urgency
- Remediation is necessary due to the potential for significant security issues.
- Action
- Update to the latest version of MongoDB Server.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.34% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 27% of all EPSS-scored CVEs.
Advisory coverage (1)
- unknownNCSC-2026-0209 [1.00] [M/H] Vulnerabilities fixed in MongoDB Serverncsc-nl · 2026-06-23
External references
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