CVE-2026-49939
Apache James: Negative IMAP ACL administer authorization bypass through JMAP protocol
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-284 |
| Vendor | apache software foundation |
| Product | apache james |
| Published | Nov 6, 2026 |
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Affected Versions
Apache Software Foundation / Apache James
3.9.0 < 3.9.1
References
Credits
Thanks mitchell from revampstudio.com.au for the report