python-zeroconf: Zeroconf is a pure Python implementation of multicast DNS service discovery
CVE-2026-47180 is fixed in python-zeroconf on 1 platform, first by OPENSUSE-SU-2026:21175-1, released June 30, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| python-zeroconf · Debian 14 | 0.149.6-1 | DEBIAN-CVE-2026-47180 | Jul 18, 2026 |
| python-zeroconf · opensuse-leap 16.0 | 0.136.0-bp160.2.1 | OPENSUSE-SU-2026:21175-1 | Jun 30, 2026 |
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