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Fencer Intel
critical 9.8

CVE-2026-105042 json

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

published 11d ago modified 4d ago also EUVD-2026-112726

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 40%
public exploits
0
none known

Summary

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.

Is CVE-2026-105042 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-105042 updated cvss 7.5

qpid-proton-c: qpid-proton-c: Denial of Service via stack overflow in pn_message_body()

  • Red Hat AMQ Clients qpid-proton 0.40.0-2.el8, python3-qpid-proton 0.40.0-1.el9, python39-qpid-proton 0.40.0-1.el8 Red Hat OpenShift Container Platform 4 openshift4/ose-kuryr-cni-rhel8, openshift4/ose-kuryr-controller-rhel8 Red Hat OpenStack Platform 13 (Queens) qpid-proton-c, qpid-proton-cpp, qpid-proton-tests, python-qpid-proton, qpid-proton 0.40.0-2.el8, rhosp13/openstack-qdrouterd, +1 more Red Hat OpenStack Platform 16.2 qpid-proton-c, python3-qpid-proton, rhosp-rhel8/openstack-qdrouterd, rhosp-rhel8/openstack-ceilometer-notification Red Hat OpenStack Platform 17.1 qpid-proton-c, python3-qpid-proton, rhosp-rhel9/openstack-qdrouterd, rhosp-rhel9/openstack-ceilometer-notification Red Hat Service Interconnect 2 qpid-proton 0.40.0-2.el8
    affected: no fix available

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
4d ago

Exploit prediction

0.46% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Apache Software Foundation Apache Qpid Proton C

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.