What’s Vulnerable › Vulnerabilities

CVE-2026-67465: Apache Qpid Proton Dotnet: Unbounded symbol value caching can lead to pre-authentication resource exhaustion

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-05 · updated 2026-10-24
• Weakness: CWE-770

Description

A pre-authentication attacker could leverage unbounded symbol value caching to cause resource exhaustion 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.

Affected products

• Apache Software Foundation Apache Qpid Proton Dotnet: before 1.1.0 — fixed in 1.1.0

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache Qpid Proton Dotnet 1.1.0. Check the vendor advisory for mitigations.

References

• https://lists.apache.org/thread/zl2pj5fo32lbyrwof89tdyrgt67bbo0m
• http://www.openwall.com/lists/oss-security/2026/08/04/21

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