Uncontrolled Recursion Affecting python-zeroconf package, versions *


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.37% (30th percentile)

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  • Snyk IDSNYK-DEBIAN12-PYTHONZEROCONF-18015067
  • published18 Jul 2026
  • disclosed17 Jul 2026

Introduced: 17 Jul 2026

CVE-2026-47180  (opens in a new tab)
CWE-674  (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 0.149.5, 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.

CVSS Base Scores

version 3.1