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  4. CVE 2026 49939 apache james negative imap acl administer
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Back to active CVEs
Unknown severity · Source severity not reportedCVE-2026-49939

Apache James: Negative IMAP ACL administer authorization bypass through JMAP protocolCVE-2026-49939

Answer in brief

CVE-2026-49939 records a Unknown severity vulnerability in Apache James: Negative IMAP ACL administer authorization bypass through JMAP protocol. The current sources do not mark it as known exploited. The current feed maps Apache Software Foundation/Apache James (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 6, 2026Updated Nov 6, 2026Source checked Nov 6, 2026First seen by HOL Nov 6, 2026Material review Nov 6, 2026
Upstream Advisory

Key facts

Risk
Unknown severitySource severity not reported
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Apache Software Foundation/Apache James (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Apache Software Foundation/Apache Jamesgeneric>=3.9.0 <3.9.13.9.1

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Apache Software Foundation/Apache James.
  2. 2Review the reported fix. Update Apache Software Foundation/Apache James to 3.9.1 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Nov 6, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 6, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 6, 2026

Sources and claim methodology

  • Source referencelists.apache.org
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Apache James: SASL OAUTHBEARER do not validate aud in JWT payload if misconfigredSame apache software foundation/apache james package
  • Apache James: WebAdmin exposed without authentication on official Docker defaultSame apache software foundation/apache james package
  • Apache James: ManageSieve file implementation cross-user path traversalSame apache software foundation/apache james package
  • Apache James: SSRF filter bypass in the JMAP PushSubscription web-push clientSame apache software foundation/apache james package
  • Apache James: Denial of service upon MIME parsingSame apache software foundation/apache james package

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-284
Source
CVE List V5
Source checked
Nov 6, 2026
References
1 linked source
Open source record