CVE-2026-67591CWE-770denial-of-service

CVE-2026-67591

Medium · published August 5, 2026

CVSS v3.1
6.5
EPSS
1%
Percentile
50.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00653 · 50.6th percentile
Weakness
CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2026-08-05T11:16Z
Affected products (1)
ProductVersionsFixed in
apache/qpid_protonj2< 1.2.01.2.0
References (2)
https://lists.apache.org/thread/rwmggh2bkm6qotxpdfcplht3jgw5n036 · [email protected]http://www.openwall.com/lists/oss-security/2026/08/04/30 · af854a3a-2127-422b-91ae-364da2661108
EPSS history
Timeline
  • 05 AUG 05:38Z
    Apache Qpid ProtonJ2: Incoming session flow control window can be exceeded
    cvelistv5