{"id":"CVE-2026-11331","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-11331","generatedAt":"2026-10-28T04:16:16.339Z","title":"An attacker who knows (or guesses) that a resolver uses RPZ with wildcard CNAME policies can craft query names long enough to trigger a NAMETOOLONG error condition during RPZ processing.","description":"An attacker who knows (or guesses) that a resolver uses RPZ with wildcard CNAME policies can craft query names long enough to trigger a NAMETOOLONG error condition during RPZ processing. This is not handled correctly and may lead to defeating the RPZ rule. It also may lead to an unexpected exit of the BIND 9 software.\nThis issue affects BIND 9 versions 9.16.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.16.8-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.","published":"2026-07-22T15:16:51.000Z","lastModified":"2026-10-24T18:10:00.000Z","status":"Undergoing Analysis","sourceIdentifier":"security-officer@isc.org","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},"cwe":["CWE-790"],"affected":[],"epss":{"score":0.00428,"percentile":0.3682,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.43%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://downloads.isc.org/isc/bind9/9.20.26","source":"security-officer@isc.org"},{"url":"https://downloads.isc.org/isc/bind9/9.21.24","source":"security-officer@isc.org"},{"url":"https://kb.isc.org/docs/cve-2026-11331","source":"security-officer@isc.org"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-11331","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}