CVE Explorer
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 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.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"python-zeroconf","vendor":"python-zeroconf","versions":[{"status":"affected","version":"< 0.149.5"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:3e9746634977c36e9ee4d0355a319c32db3e588864f278040b71e9d705ca3059 · sha256:70c33fcace14cbae… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"ADJACENT_NETWORK","availabilityImpact":"HIGH","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:3e9746634977c36e9ee4d0355a319c32db3e588864f278040b71e9d705ca3059 · sha256:70c33fcace14cbae… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-674","description":"CWE-674: Uncontrolled Recursion","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:3e9746634977c36e9ee4d0355a319c32db3e588864f278040b71e9d705ca3059 · sha256:70c33fcace14cbae… · /containers/cna/problemTypes/0/descriptions/0
Source references
4 source assertions{"name":"https://github.com/python-zeroconf/python-zeroconf/commit/f9e23592137f30fdf7ef710dba065da31c79b1cf","tags":["x_refsource_MISC"],"url":"https://github.com/python-zeroconf/python-zeroconf/commit/f9e23592137f30fdf7ef710dba065da31c79b1cf"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:3e9746634977c36e9ee4d0355a319c32db3e588864f278040b71e9d705ca3059 · sha256:70c33fcace14cbae… · /containers/cna/references/2
{"name":"https://github.com/python-zeroconf/python-zeroconf/pull/1719","tags":["x_refsource_MISC"],"url":"https://github.com/python-zeroconf/python-zeroconf/pull/1719"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:3e9746634977c36e9ee4d0355a319c32db3e588864f278040b71e9d705ca3059 · sha256:70c33fcace14cbae… · /containers/cna/references/1
{"name":"https://github.com/python-zeroconf/python-zeroconf/releases/tag/0.149.5","tags":["x_refsource_MISC"],"url":"https://github.com/python-zeroconf/python-zeroconf/releases/tag/0.149.5"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:3e9746634977c36e9ee4d0355a319c32db3e588864f278040b71e9d705ca3059 · sha256:70c33fcace14cbae… · /containers/cna/references/3
{"name":"https://github.com/python-zeroconf/python-zeroconf/security/advisories/GHSA-9pgc-3ccv-5297","tags":["x_refsource_CONFIRM"],"url":"https://github.com/python-zeroconf/python-zeroconf/security/advisories/GHSA-9pgc-3ccv-5297"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:3e9746634977c36e9ee4d0355a319c32db3e588864f278040b71e9d705ca3059 · sha256:70c33fcace14cbae… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.