Resource exhaustion in Python-zeroconf
CVE-2026-47183
Zeroconf is a pure Python implementation of multicast DNS service discovery. Prior to 0.149.6, DNSIncoming._log_exception_debug and the four QuietLogger exception-dedup methods stored an unbounded _seen_logs dictionary keyed by attacker-in…
Vulnerability class: DoS (Denial of Service)
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 < 0.149.6
Weakness classification (CWE)
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)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-47183?
- CVE-2026-47183 is a medium-severity vulnerability in Python-zeroconf, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2026-07-17.
- How severe is CVE-2026-47183?
- Medium severity. CVSS v3 base score is 6.5 out of 10.