What is CVE-2026-47180?

CVE-2026-47180 is a medium-severity vulnerability in Python-zeroconf, classified under Uncontrolled Recursion. CVSS score: 6.5/10. Published 2026-07-17.

How severe is CVE-2026-47180?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Python-zeroconf

CVE-2026-47180

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 trig…

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Python-zeroconf — versions < 0.149.5

Weakness classification (CWE)

CWE-674 — Uncontrolled Recursion

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-47180?: CVE-2026-47180 is a medium-severity vulnerability in Python-zeroconf, classified under Uncontrolled Recursion. CVSS score: 6.5/10. Published 2026-07-17.
How severe is CVE-2026-47180?: Medium severity. CVSS v3 base score is 6.5 out of 10.