{"action":"Upgrade zookeeper to 3.4.9-3 or later.","affected":[{"fixed":"3.4.9-3","introduced":"0"}],"component":"zookeeper","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["3.4.9-3"],"id":"tcs_01M5NCFDJB9W0XBFPZEX7WBWPK","modified_at":"2026-09-01T20:03:48.691989773Z","published_at":"2017-10-10T01:30:22.360Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2017-5637","https://security-tracker.debian.org/tracker/CVE-2017-5637"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2017-5637#Debian:14/zookeeper","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2017-5637"}],"summary":"Two four letter word commands \"wchp/wchc\" are CPU intensive and could cause spike of CPU utilization on Apache ZooKeeper server if abused, which leads to the server unable to serve legitimate client r"}