{"id":"CLEANSTART-2026-TC39210","summary":"Hostname verification in Apache ZooKeeper ZKTrustManager falls back to reverse DNS (PTR) when IP SAN validation fails, allowing attackers who control or spoof PTR records to impersonate ZooKeeper s...","details":"Security vulnerability affects the druid-fips package. Hostname verification in Apache ZooKeeper ZKTrustManager falls back to reverse DNS (PTR) when IP SAN validation fails, allowing attackers who control or spoof PTR records to impersonate ZooKeeper servers or clients with a valid certificate for the PTR name.","modified":"2026-10-31T16:04:22.094856034Z","published":"2026-10-31T13:28:55.009825Z","upstream":["CVE-2026-24281"],"database_specific":{},"references":[{"type":"ADVISORY","url":"https://github.com/cleanstart-dev/cleanstart-security-advisories/tree/main/advisories/2026/CLEANSTART-2026-TC39210.json"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-24281"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-24281"}],"affected":[{"package":{"name":"druid-fips","ecosystem":"CleanStart","purl":"pkg:apk/cleanstart/druid-fips"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"34.0.0-r1"}]}],"database_specific":{"source":"https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-TC39210.json"}},{"package":{"name":"druid-fips","ecosystem":"CleanStart","purl":"pkg:apk/cleanstart/druid-fips"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"35.0.1-r0"}]}],"database_specific":{"source":"https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-TC39210.json"}},{"package":{"name":"druid-fips","ecosystem":"CleanStart","purl":"pkg:apk/cleanstart/druid-fips"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"36.0.0-r0"}]}],"database_specific":{"source":"https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-TC39210.json"}},{"package":{"name":"druid-fips","ecosystem":"CleanStart","purl":"pkg:apk/cleanstart/druid-fips"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"32.0.1-r1"}]}],"database_specific":{"source":"https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-TC39210.json"}},{"package":{"name":"druid-fips","ecosystem":"CleanStart","purl":"pkg:apk/cleanstart/druid-fips"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"33.0.0-r1"}]}],"database_specific":{"source":"https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-TC39210.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"}]}