CVE-2026-105042

Critical

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.

SeverityCritical

CVSS9.8

Exploit probability—

ProductApache Qpid Proton C

PublishedOct 29, 2026

First seenNov 4, 2026

Weakness typeCWE-674CWE-674

How to fix

Vendor advisories

lists.apache.org/thread.html/7v54gx7o1ptxcz3h9549w3h9oxo3ns28

Affected products

Product	Affected versions	Fixed in
Apache Software Foundation Apache Qpid Proton C	v ≤ 0.40.0	—

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