CVE-2026-47180

Name
CVE-2026-47180
Description
Zeroconf is a pure Python implementation of multicast DNS service discovery. Prior to 0.149.5, DNSIncoming._decode_labels_at_offset recurses once per DNS-name compression pointer, and a single mDNS packet carrying chained pointers can trigger a RecursionError that escapes DNSIncoming.__init__, causing sustained CPU burn, log flooding, and degraded mDNS-dependent features for unauthenticated hosts on the local link over UDP/5353 (224.0.0.251 / ff02::fb). This issue is fixed in version 0.149.5.
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
security-advisories@github.com https://github.com/python-zeroconf/python-zeroconf/commit/f9e23592137f30fdf7ef710dba065da31c79b1cf
security-advisories@github.com https://github.com/python-zeroconf/python-zeroconf/pull/1719
security-advisories@github.com https://github.com/python-zeroconf/python-zeroconf/releases/tag/0.149.5
security-advisories@github.com https://github.com/python-zeroconf/python-zeroconf/security/advisories/GHSA-9pgc-3ccv-5297

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:paulsm:zeroconf:*:*:*:*:*:python:*:* py3-zeroconf >= None < 0.149.5

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
py3-zeroconf edge-community 0.147.2-r1 Achill Gilgenast <achill@achill.org> possibly vulnerable
py3-zeroconf edge-community 0.147.2-r0 Achill Gilgenast <achill@achill.org> possibly vulnerable
py3-zeroconf edge-community 0.147.0-r1 Achill Gilgenast <achill@achill.org> possibly vulnerable
py3-zeroconf edge-community 0.147.0-r0 fossdd <fossdd@pwned.life> possibly vulnerable
py3-zeroconf edge-community 0.146.5-r0 fossdd <fossdd@pwned.life> possibly vulnerable
py3-zeroconf edge-community 0.146.3-r0 fossdd <fossdd@pwned.life> possibly vulnerable
py3-zeroconf edge-community 0.144.1-r0 fossdd <fossdd@pwned.life> possibly vulnerable
py3-zeroconf edge-community 0.132.2-r0 Fabian Affolter <fabian@affolter-engineering.ch> possibly vulnerable
py3-zeroconf 3.24-community 0.147.2-r1 Achill Gilgenast <achill@achill.org> possibly vulnerable