VulnerabilityAnalyzed

CVE-2026-67554

An authenticated attacker can craft a disposition frame with large or illegal ranges causing excessive CPU usage due to naive range handling, 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 can craft a disposition frame with large or illegal ranges causing excessive CPU usage due to naive range handling, 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-606
Affected: apache/qpid proton-dotnet
Source: security@apache.org

References

https://lists.apache.org/thread/5ndlowz29464ytj98gz9z9ljhwnmb2hmMailing List, Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/08/04/25Mailing List, Third Party Advisory

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