VulnerabilityAnalyzed

CVE-2026-67551

pre-authentication attacker could leverage type size/count handling to cause excessive allocation leading to potential denial of service.

HIGH 7.5EPSS 0.49%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.49%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

pre-authentication attacker could leverage type size/count handling to cause excessive allocation leading to potential 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: 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.49% probability · 41th percentile
CISA KEV: Not listed
Weakness: CWE-789
Affected: apache/qpid proton-dotnet
Source: security@apache.org

References

https://lists.apache.org/thread/o566fhkrr3gg0lyzt24xwvz9w94oo6roVendor Advisory
http://www.openwall.com/lists/oss-security/2026/08/04/22Third Party Advisory

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