Improper Handling of Length Parameter Inconsistency Affecting python-zeroconf package, versions *


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.47% (38th percentile)

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  • Snyk IDSNYK-DEBIAN12-PYTHONZEROCONF-18015074
  • published18 Jul 2026
  • disclosed17 Jul 2026

Introduced: 17 Jul 2026

CVE-2026-48487  (opens in a new tab)
CWE-130  (opens in a new tab)

How to fix?

There is no fixed version for Debian:12 python-zeroconf.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python-zeroconf package and not the python-zeroconf package as distributed by Debian. See How to fix? for Debian:12 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1