CVE-2026-105042

Apache Qpid Proton C: Unbounded recursion in parsing AMQP message bodies can lead to crash

Published Oct 29, 2026 CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
Description
A message body that is deeply nested and decoded by pn_message_body() could overflow the stack and cause a crash.



This issue affects Apache Qpid Proton C: through 0.40.0.



Users are recommended to upgrade to version 0.41.1, which fixes the issue.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Type Values Removed Values Added
Weaknesses CWE-770
References
Metrics threat_severity

None

cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Important

Type Values Removed Values Added
First Time appeared Apache
Apache qpid Proton-c
Vendors & Products Apache
Apache qpid Proton-c
Type Values Removed Values Added
Description A message body that is deeply nested and decoded by pn_message_body() could overflow the stack and cause a crash. This issue affects Apache Qpid Proton C: through 0.40.0. Users are recommended to upgrade to version 0.41.1, which fixes the issue.
Title Apache Qpid Proton C: Unbounded recursion in parsing AMQP message bodies can lead to crash
Weaknesses CWE-674
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
apache
Published
Updated
Nov 5, 2026, 9:29 PM
Reserved
Oct 2, 2026, 9:31 PM
Status
Deferred
Published
Oct 29, 2026, 11:17 AM
Modified
Nov 5, 2026, 10:17 PM
Severity
Important
Public date
Oct 29, 2026, 10:17 AM