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Fencer Vulns
medium 6.5

CVE-2026-66277 json

Apache Qpid Proton-J: Unable to govern the maximum number of transfer frames per incoming delivery

published 2026-08-05 3 mo ago modified 2026-10-24 15 d ago also EUVD-2026-53093

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 51%
public exploits
0
none known

Summary

It was not possible to govern the maximum number of transfer frames per incoming delivery, enabling an authenticated attacker to cause excessive resource usage and potential denial of service.

This issue affects Apache Qpid Proton-J: through 0.34.1.

Users are recommended to upgrade to version 0.35.0, which fixes the issue.

Patch / fix

  • apache qpid_proton-j 0.35.0

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-2026-66277 updated cvss 6.5

org.apache.qpid/proton-j: Apache Qpid Proton-J: Denial of Service via uncontrolled transfer frames

  • Red Hat AMQ Broker 7 amq-broker-bin.zip 7.14.1.CR2, amq-broker-maven-repository.zip 7.14.1.CR2 Red Hat AMQ Clients proton-j 0.34.1.redhat-00002 Red Hat build of Apache Camel 4 for Quarkus 3 proton-j 0.34.1.redhat-00002 Red Hat build of Apache Camel for Spring Boot 4 rhaf-camel-maven-repository.zip 4.18.1.ER9, rhaf-camel-for-springboot-maven-repository.zip 4.18.1, rhaf-camel-spring-boot-maven-repository.zip 4.18.1.CS4 Red Hat build of Quarkus proton-j 0.34.1.redhat-00002 Red Hat JBoss Enterprise Application Platform Expansion Pack proton-j 0.34.1.redhat-00002
    affected: workaround, no fix available “Upgrade to Apache Qpid Proton-J version 0.35 or later.”

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
no
Technical impact
partial
Assessed
3 mo ago

Exploit prediction

0.65% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Apache Software Foundation Apache Qpid Proton-J

Classification

Weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling

References

Sources

Fencer Vulns 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.