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TI-2026-85895 Aliases CVE-2026-49939GHSA-84j6-j2xp-crm8

Apache James: JMAP bypasses negative IMAP ACL administer rights

Priority LOW 22CWE-284Published · Updated

Key facts

Attack vector
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Privileges required
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User interaction
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Attack complexity
—
Impact type
Security bypass
Confidentiality · integrity · availability
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Fix status
Fixed

No CVSS vector from any source. Fix status from CNA. Impact type from CWE-284.

Summary

Apache James before 3.9.1 does not apply IMAP negative access control list rules to requests made over the JMAP protocol. As a result, users can administer folders through JMAP even when IMAP has explicitly denied them that right. The weakness is classified as CWE-284, Improper Access Control.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

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.

Why it matters now

EPSS 0.00201 10th percentileScored 2026-11-07
Fix Fixed Apache James (Apache Software Foundation): 3.9.1

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache James3.9.0 to before 3.9.13.9.1Patch availableCNA
  • Apache James VendorApache Affected 3.9.0 to before 3.9.1 Fixed in 3.9.1 Patch available CNA

Remediation

Upgrade Apache James to version 3.9.1, which fixes this issue.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

  • Fix · CNA Apache James (Apache Software Foundation) Fixed in 3.9.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Apache James 3.9.1

    6 records Highest priority Priority LOW 6 LOW

    Other records, highest priority first

    • TI-2026-85900 Unbounded resource allocation in Apache James MIME parsingPriority LOW 38
    • TI-2026-85898 Path traversal in Apache James ManageSieve lets users write other users' scriptsPriority LOW 22
    • TI-2026-85897 Apache James WebAdmin exposed without authentication in default Docker setupPriority LOW 22
    Show all 6 records →

Timeline

  1. 2026-11-06 Threatist record created from CVE-2026-49939
  2. 2026-11-06 Alias added: GHSA-84j6-j2xp-crm8

References

Advisory 1

  • TI-2025-18529 Apache Tomcat: Potential RCE and/or information disclosure and/or information corruption with partial PUT KEVCVSS 3.1CRITICAL 10.0
  • TI-2024-30292 Apache OFBiz: Confused controller-view authorization logic (forced browsing) KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-26062 Apache OFBiz: Unauthenticated endpoint could allow execution of screen rendering code KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-21190 Apache OFBiz: Path traversal leading to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-18186 Apache HugeGraph-Server: Command execution in gremlin KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-25106 Deserialization of untrusted data in Apache ActiveMQ KEVCVSS 3.1CRITICAL 10.0
See all 4053 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences