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  4. CVE 2026 73101 apache juneau internal exception class and
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Back to active CVEs
Critical · CVSS 10.0CVE-2026-73101

Apache Juneau: Internal exception class and message disclosed via error response header and body regardless of secure defaultsCVE-2026-73101

Answer in brief

CVE-2026-73101 records a Critical severity (CVSS 10.0) vulnerability in Apache Juneau: Internal exception class and message disclosed via error response header and body regardless of secure defaults. The current sources do not mark it as known exploited. The current feed maps Apache Software Foundation/org.apache.juneau:juneau-rest-server. (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 5, 2026Updated Nov 5, 2026Source checked Nov 5, 2026First seen by HOL Nov 5, 2026Material review Nov 5, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 10.0
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 10.0. 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/org.apache.juneau:juneau-rest-server. (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Apache Software Foundation/org.apache.juneau:juneau-rest-server.generic>=0 <9.2.19.2.1

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Apache Software Foundation/org.apache.juneau:juneau-rest-server..
  2. 2Review the reported fix. Update Apache Software Foundation/org.apache.juneau:juneau-rest-server. to 9.2.1 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Nov 5, 2026

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

  2. Source modified

    Nov 5, 2026

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

  3. First seen by HOL

    Nov 5, 2026

Sources and claim methodology

  • Source referencelists.apache.org
Upstream source description

Generation of Error Message Containing Sensitive Information vulnerability in Apache Juneau. The REST server sends the internal exception class and message to clients in a "Thrown" response header on every error response, and can include internal exception messages in the error body, even when stack-trace rendering is disabled. This reveals implementation details to remote clients. This issue affects Apache Juneau: through 9.2.0. Users are recommended to upgrade to version 9.2.1, which fixes the issue.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Apache Juneau: Cross-site request forgery via default-enabled content query-parameter body overrideSame apache software foundation/org.apache.juneau package

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-209
Source
CVE List V5
Source checked
Nov 5, 2026
References
1 linked source
Open source record