CVE-2026-67588
HIGH
CVSS 7.5
Java
Verified Advisory
Pre-authentication denial of service in Apache Qpid ProtonJ2 (CVE-2026-67588)
Apache Qpid ProtonJ2 contains a vulnerability in its symbol value caching mechanism that imposes no upper bound on cache growth. A pre-authentication attacker can exploit this to exhaust server resources, resulting in denial of service.
Affected versions:
- Apache Qpid ProtonJ2 (org.apache.qpid:protonj2) through 1.1.0
We recommend updating to: 1.2.0.
CVSS ? · our assessment: act_now
Reference: https://seclists.org/oss-sec/2026/q3/427
Details: https://vuln.today/cve/CVE-2026-67588
Verified by vuln.today against published advisories.
Affected versions
- – Apache Qpid ProtonJ2 (org.apache.qpid:protonj2) through 1.1.0
Fixed in: 1.2.0
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