CVE-2026-66257
HIGH
CVSS 7.5
Java
Verified Advisory
Pre-authentication resource exhaustion in Apache Qpid Proton-J (CVE-2026-66257)
Apache Qpid Proton-J contains a vulnerability in which symbol values are cached without bound, allowing a pre-authentication attacker to exhaust server resources. Successful exploitation results in denial of service.
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/q3/408
Details: https://vuln.today/cve/CVE-2026-66257
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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