VulnerabilityAnalyzed

CVE-2026-67553

An authenticated attacker could exceed the session flow control incoming window potentially leading to denial of service.

MEDIUM 6.5EPSS 0.41%

Does this matter?

Lower severity and a low EPSS score (0.41%). Track it; it rarely justifies an emergency change on its own.

Description

An authenticated attacker could exceed the session flow control incoming window potentially leading to denial of service. This issue affects Apache Qpid Proton-Dotnet: through 1.0.0. Users are recommended to upgrade to version 1.1.0, which fixes the issue.

CVSS 3.1: 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.41% probability · 35th percentile
CISA KEV: Not listed
Weakness: CWE-770
Affected: apache/qpid proton-dotnet
Source: security@apache.org

References

https://lists.apache.org/thread/hvsncmcbgjrn85crs909nf4y3dqqrywoMailing List, Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/08/04/24Mailing List, Third Party Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.