CVE-2026-67552
HIGH
CVSS 7.5
Java
Verified Advisory
Pre-authentication stack overflow in Apache Qpid Proton Dotnet (CVE-2026-67552)
A pre-authentication attacker can exploit unbounded type nesting in Apache Qpid Proton Dotnet to trigger a StackOverflowError, potentially causing denial of service. No authentication is required to trigger this condition, making it remotely exploitable by unauthenticated attackers.
Affected versions:
- Apache Qpid Proton Dotnet (org.apache.qpid) through 1.0.0
We recommend updating to: 1.1.0.
CVSS ? · our assessment: act_now
Reference: https://seclists.org/oss-sec/2026/q3/423
Details: https://vuln.today/cve/CVE-2026-67552
Verified by vuln.today against published advisories.
Affected versions
- – Apache Qpid Proton Dotnet (org.apache.qpid) through 1.0.0
Fixed in: 1.1.0
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- CVE-2026-67553 – Denial of service via session flow control bypass in Apache Qpid Proton Dotnet (CVE-2026-67553)