{"id":"CVE-2026-47183","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-47183","generatedAt":"2026-10-28T03:26:45.564Z","title":"Prior to 0.149.6, DNSIncoming._log_exception_debug and the four QuietLogger exception-dedup methods stored an unbounded _seen_logs dictionary keyed by attacker-influenced IncomingDecodeError messages, retaining sys.exc_info() tracebacks whose frame…","description":"Zeroconf is a pure Python implementation of multicast DNS service discovery. Prior to 0.149.6, DNSIncoming._log_exception_debug and the four QuietLogger exception-dedup methods stored an unbounded _seen_logs dictionary keyed by attacker-influenced IncomingDecodeError messages, retaining sys.exc_info() tracebacks whose frame locals kept raw packet self.data buffers and allowing unauthenticated hosts on the local link over UDP/5353 (224.0.0.251 / ff02::fb) to drive memory growth until mDNS-dependent features degrade or the process is OOM-killed. This issue is fixed in version 0.149.6.","published":"2026-07-17T19:17:15.000Z","lastModified":"2026-08-17T19:50:03.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-400"],"affected":["paulsm/zeroconf"],"epss":{"score":0.00389,"percentile":0.32731,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.39%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/python-zeroconf/python-zeroconf/commit/95561e28b24922358f1991e38e3a86d70d72dcec","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/python-zeroconf/python-zeroconf/issues/1714","tags":["Issue Tracking","Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/python-zeroconf/python-zeroconf/pull/1717","tags":["Issue Tracking","Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/python-zeroconf/python-zeroconf/releases/tag/0.149.6","tags":["Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/python-zeroconf/python-zeroconf/security/advisories/GHSA-phvx-9mgw-67r5","tags":["Vendor Advisory","Patch"],"source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-47183","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."}