python-zeroconf: Zeroconf is a pure Python implementation of multicast DNS service discovery
CVE-2026-48487 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 0.149.16, _read_character_string and _read_string in src/zeroconf/_protocol/incoming.py advanced self.offset by attacker-declared RDLENGTH without checking it against self._data_len, allowing unauthenticated hosts on the local link over UDP/5353 (224.0.0.251 / ff02::fb) to send a TXT, HINFO, or A/AAAA record with rdlength=65535 and seed DNSCache and ServiceInfo.properties with truncated, attacker-shaped key/value or address records. This issue is fixed in version 0.149.16.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| python-zeroconf · Debian 14 | 0.149.16-1 | DEBIAN-CVE-2026-48487 | 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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