CVE-2026-67591

An authenticated attacker could exceed the session flow control incoming window potentially leading to denial of service. This issue affects Apache Qpid ProtonJ2: through 1.1.0. Users are recommended to upgrade to version 1.2.0, which fixes the issue.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://lists.apache.org/thread/rwmggh2bkm6qotxpdfcplht3jgw5n036	Mailing List Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/08/04/30	Mailing List Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:apache:qpid_protonj2:*:*:*:*:*:*:*:*

History

07 Aug 2026, 19:44

Type	Values Removed	Values Added
References	~~() https://lists.apache.org/thread/rwmggh2bkm6qotxpdfcplht3jgw5n036 -~~	() https://lists.apache.org/thread/rwmggh2bkm6qotxpdfcplht3jgw5n036 - Mailing List, Vendor Advisory
References	~~() http://www.openwall.com/lists/oss-security/2026/08/04/30 -~~	() http://www.openwall.com/lists/oss-security/2026/08/04/30 - Mailing List, Third Party Advisory
First Time		Apache qpid Protonj2 Apache
CPE		cpe:2.3:a:apache:qpid_protonj2::::::::

06 Aug 2026, 16:16

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 6.5

05 Aug 2026, 08:16

Type	Values Removed	Values Added
References		() http://www.openwall.com/lists/oss-security/2026/08/04/30 -

05 Aug 2026, 07:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-08-05 07:16

Updated : 2026-08-07 19:44

NVD link : CVE-2026-67591

Mitre link : CVE-2026-67591

CVE.ORG link : CVE-2026-67591

JSON object : View

Products Affected

apache

qpid_protonj2

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

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