CVE Explorer

CVE-2026-48487

Zeroconf is a pure Python implementation of multicast DNS service discovery. Prior to 0.149.16, _read_character_string and _read_string in src/zeroconf/_protocol/incoming.py advanced self.offset by attacker-declared RDLENGTH without checking it against self._data_len, allowing unauthenticated hosts on the local link over UDP/5353 (224.0.0.251 / ff02::fb) to send a TXT, HINFO, or A/AAAA record with rdlength=65535 and seed DNSCache and ServiceInfo.properties with truncated, attacker-shaped key/val

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:ab71f0dff7a7e41617c554843da7e6bfbcb973836b71e301184fbf58a6fe48f3

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"python-zeroconf","vendor":"python-zeroconf","versions":[{"status":"affected","version":"< 0.149.16"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:4ddcc4c6a57807d8ac9ae4897ea0ee7b36b4fa6e79d36ffa2cd98c7fd7854c66 · sha256:20329c74a554561a… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"ADJACENT","baseScore":5.3,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW"},"metric_type":"cvssV4_0"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:4ddcc4c6a57807d8ac9ae4897ea0ee7b36b4fa6e79d36ffa2cd98c7fd7854c66 · sha256:20329c74a554561a… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion

{"cweId":"CWE-130","description":"CWE-130: Improper Handling of Length Parameter Inconsistency","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:4ddcc4c6a57807d8ac9ae4897ea0ee7b36b4fa6e79d36ffa2cd98c7fd7854c66 · sha256:20329c74a554561a… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions

{"name":"https://github.com/python-zeroconf/python-zeroconf/commit/544449596e645fcaad3834fa0cb614a54f847a82","tags":["x_refsource_MISC"],"url":"https://github.com/python-zeroconf/python-zeroconf/commit/544449596e645fcaad3834fa0cb614a54f847a82"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:4ddcc4c6a57807d8ac9ae4897ea0ee7b36b4fa6e79d36ffa2cd98c7fd7854c66 · sha256:20329c74a554561a… · /containers/cna/references/3

{"name":"https://github.com/python-zeroconf/python-zeroconf/issues/1752","tags":["x_refsource_MISC"],"url":"https://github.com/python-zeroconf/python-zeroconf/issues/1752"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:4ddcc4c6a57807d8ac9ae4897ea0ee7b36b4fa6e79d36ffa2cd98c7fd7854c66 · sha256:20329c74a554561a… · /containers/cna/references/1

{"name":"https://github.com/python-zeroconf/python-zeroconf/pull/1756","tags":["x_refsource_MISC"],"url":"https://github.com/python-zeroconf/python-zeroconf/pull/1756"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:4ddcc4c6a57807d8ac9ae4897ea0ee7b36b4fa6e79d36ffa2cd98c7fd7854c66 · sha256:20329c74a554561a… · /containers/cna/references/2

{"name":"https://github.com/python-zeroconf/python-zeroconf/releases/tag/0.149.16","tags":["x_refsource_MISC"],"url":"https://github.com/python-zeroconf/python-zeroconf/releases/tag/0.149.16"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:4ddcc4c6a57807d8ac9ae4897ea0ee7b36b4fa6e79d36ffa2cd98c7fd7854c66 · sha256:20329c74a554561a… · /containers/cna/references/4

{"name":"https://github.com/python-zeroconf/python-zeroconf/security/advisories/GHSA-qc2x-6f54-m6h9","tags":["x_refsource_CONFIRM"],"url":"https://github.com/python-zeroconf/python-zeroconf/security/advisories/GHSA-qc2x-6f54-m6h9"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:4ddcc4c6a57807d8ac9ae4897ea0ee7b36b4fa6e79d36ffa2cd98c7fd7854c66 · sha256:20329c74a554561a… · /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.

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