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OpenAdvisories
Critical · 9.1 CVE-2026-105031 EUVD-2026-112725GHSA-75pq-3xrq-9pc6

Apache Qpid Proton C: The OpenSSL TLS implementation adds a locally trusted certificate authority to the existing trusted system trust anchors.

Published Oct 29, 2026 · Updated Nov 5, 2026 · Assigned by apache

Description

When using the OpenSSL TLS implementation, both the pn_ssl_domain_set_trusted_ca_db() & pn_tls_config_set_trusted_certs() APIs added to rather than replaced the default system trust anchors. Leading to potentially trusting unexpected peer certificates.

This can be worked around by setting the SSL_CERT_FILE environment variable for the application to /dev/null.

This issue does not affect the Win32 SChannel TLS implementation.

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.

Affected products

VendorProductAffectedFixed
Apache Software Foundation Apache Qpid Proton C ≤ 0.40.0 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 14 qpid-proton No fix yet —
Debian 13 qpid-proton No fix yet —
Debian 12 qpid-proton No fix yet —

Azure Linux

ReleasePackageFixed inAdvisory
Azure Linux 3 qpid-proton No fix yet —

References