Allocation of Resources Without Limits or Throttling 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-ECHOLATEST-PYTHONZEROCONF-18011654
  • published18 Jul 2026
  • disclosed17 Jul 2026

Introduced: 17 Jul 2026

CVE-2026-48045  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

There is no fixed version for Echo:latest 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 Echo. See How to fix? for Echo:latest relevant fixed versions and status.

Zeroconf is a pure Python implementation of multicast DNS service discovery. Prior to 0.149.12, AsyncListener.handle_query_or_defer retained every truncated TC-bit incoming query, each up to _MAX_MSG_ABSOLUTE = 8966 bytes, in self._deferred[addr] and armed a per-address timer in self._timers[addr] without capping the per-address list or distinct addr keys, allowing unauthenticated hosts on the local link over UDP/5353 (224.0.0.251 / ff02::fb) to spoof sources, grow _deferred and _timers, and cause memory exhaustion and quadratic CPU burn. This issue is fixed in version 0.149.12.

CVSS Base Scores

version 3.1