CVE-2026-66273
HIGH
CVSS 7.5
Java
Verified Advisory
Pre-authentication denial of service in Apache Qpid Proton-J (CVE-2026-66273)
Apache Qpid Proton-J contains a flaw in type size/count handling that allows a pre-authentication attacker to trigger excessive memory allocation. This can lead to a potential denial of service condition.
Affected versions:
- Apache Qpid Proton-J (org.apache.qpid:proton-j) through 0.34.1
We recommend updating to: 0.35.0.
CVSS ? · our assessment: act_now
Reference: https://seclists.org/oss-sec/2026/q3/409
Details: https://vuln.today/cve/CVE-2026-66273
Verified by vuln.today against published advisories.
Affected versions
- – Apache Qpid Proton-J (org.apache.qpid:proton-j) through 0.34.1
Fixed in: 0.35.0
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