CVE-2026-49939

Description

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 administer folders in JMAP despite having being explicitly denied the right to do so in IMAP. Users are recommended to upgrade to version 3.9.1 which fixes this issue.

References

https://lists.apache.org/thread.html/7qwsmkk88xbfq4q9o0pz9bt8p9p1yjs7

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-118216

http://www.openwall.com/lists/oss-security/2026/11/06/14

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3