Detections
Analytics

SCA: security update for zeroconf (GHSA-rfg2-pjw2-56x2)

medium Tenable Cloud Security Plugin ID 442505

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Zeroconf is a pure Python implementation of multicast DNS service discovery. Prior to 0.149.7,
 DNSCache._async_add inserted every response record into cache, _expirations, _expire_heap, and
 service_cache without a cap, allowing unauthenticated hosts on the local link over UDP/5353 (224.0.0.251 /
 ff02::fb) to multicast valid mDNS responses with unique names and cause memory exhaustion, slower cache
 lookups, slower async_expire passes, and broken discovery, registration, and ServiceBrowser callbacks.
 This issue is fixed in version 0.149.7. (CVE-2026-47184)

Solution

Update the zeroconf library and its related packages to version 0.149.7 or later.

See Also

https://github.com/advisories/GHSA-rfg2-pjw2-56x2

Plugin Details

Severity: Medium

ID: 442505

Version: Revision 1.4

Type: Local

Family: SCA Checks

Published: 5/30/2026

Updated: 7/20/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.71

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 4.5

Vector: CVSS2#AV:A/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-47184

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 5/29/2026

Vulnerability Publication Date: 5/29/2026

Reference Information

CVE: CVE-2026-47184