SB2026082555 - Multiple vulnerabilities in Apache Qpid ProtonJ2

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Main Vulnerability Database SB2026082555

SB2026082555 - Multiple vulnerabilities in Apache Qpid ProtonJ2

Published: August 25, 2026

Security Bulletin ID SB2026082555
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 5
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 60% Low 40%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 5 vulnerabilities.


1) Resource exhaustion (CVE-ID: CVE-2026-67592)

CWE-ID: CWE-400 - Resource exhaustion

CVSSv4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote user to cause a denial of service.

The vulnerability exists due to improper resource management in incoming delivery transfer frame handling when processing incoming deliveries. A remote user can send an excessive number of transfer frames to cause a denial of service.


2) Allocation of Resources Without Limits or Throttling (CVE-ID: CVE-2026-67591)

CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling

CVSSv4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote user to cause a denial of service.

The vulnerability exists due to improper enforcement of flow control limits in incoming session flow control handling when processing session flow control updates. A remote user can exceed the session flow control incoming window to cause a denial of service.


3) Uncontrolled Recursion (CVE-ID: CVE-2026-67590)

CWE-ID: CWE-674 - Uncontrolled Recursion

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to unbounded type nesting in the type parser when processing nested type data before authentication. A remote attacker can send specially crafted nested type input to cause a denial of service.


4) Input validation error (CVE-ID: CVE-2026-67589)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper input validation in type size/count handling when parsing pre-authentication input. A remote attacker can send specially crafted data to cause a denial of service.


5) Resource exhaustion (CVE-ID: CVE-2026-67588)

CWE-ID: CWE-400 - Resource exhaustion

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to uncontrolled resource consumption in symbol value caching when processing untrusted pre-authentication input. A remote attacker can send input that triggers unbounded symbol value caching to cause a denial of service.


Remediation

Install update from vendor's website.

References