VulnerabilityAnalyzed

CVE-2026-67552

A pre-authentication attacker could leverage type nesting to cause a StackOverflowError potentially leading to denial of service.

HIGH 7.5EPSS 0.48%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.48%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

A pre-authentication attacker could leverage type nesting to cause a StackOverflowError 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: 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.48% probability · 40th percentile
CISA KEV: Not listed
Weakness: CWE-674
Affected: apache/qpid proton-dotnet
Source: security@apache.org

References

https://lists.apache.org/thread/4dyg0gycrv55ox4oywqght61b053g8xjMailing List, Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/08/04/23Mailing List, Third Party Advisory

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