PatchTheCEVqpid proton-j vulnerabilities and fixes
Recent CVEs affecting qpid proton-j, with upgrade or downgrade steps. 6 tracked.
qpid proton-j has 6 tracked vulnerabilities, 0 critical. A fixed release or vendor patch exists for 6. Most recent: 2026-08-05. Highest priority: CVE-2026-66257 (score 50/100).
- CVE-2026-66257 HIGH 7.5 UPGRADE A pre-authentication attacker could leverage unbounded symbol value caching to cause resource exhaustion leadi
- CVE-2026-66273 HIGH 7.5 UPGRADE A pre-authentication attacker could leverage type size/count handling to cause excessive allocation leading to
- CVE-2026-66274 HIGH 7.5 UPGRADE A pre-authentication attacker could leverage type nesting to cause a StackOverflowError potentially leading to
- CVE-2026-66275 MEDIUM 6.5 UPGRADE An authenticated attacker could exceed the session flow control incoming window potentially leading to denial
- CVE-2026-66276 MEDIUM 6.5 UPGRADE An authenticated attacker can craft a disposition frame with large or illegal ranges causing excessive CPU usa
- CVE-2026-66277 MEDIUM 6.5 UPGRADE It was not possible to govern the maximum number of transfer frames per incoming delivery, enabling an authent
FAQ
How do I fix qpid proton-j vulnerabilities?
Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.
Is qpid proton-j being exploited right now?
None of the tracked qpid proton-j CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.
Which qpid proton-j CVE should I patch first?
CVE-2026-66257 currently ranks highest (50/100): A pre-authentication attacker could leverage unbounded symbol value caching to cause resource exhaustion leadi.