CVE-2026-49939 high vulnerability summary
In Apache James server prior version 3.9.1 improper Access Control List processing is exposed by the JMAP protocol which do not account for negative rules positionned by IMAP protocol. This results in users being able to...
CVE-2026-49939 is a High severity vulnerability notice that security teams should triage for exposure in their own environments.
What to review
The affected area appears to involve In Apache James server prior version 3.9.1 improper Access Control List processing is exposed by the JMAP protocol. Administrators should compare this notice against their asset inventory, dependency list, and externally exposed services.
Recommended action
Confirm whether the affected product or library is present, review vendor guidance, prioritize patching based on internet exposure and severity, and monitor logs for suspicious behavior tied to the affected component.
This brief is based on information from Tenable Newest CVEs . Please refer to the original source for the complete advisory and vendor-specific guidance.
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