CVE-2026-48487Disclosure(paulsm / zeroconf)

LOWCVSS 5.3 · MEDIUM

Signal is active with 2 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

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/value or address records. This issue is fixed in version 0.149.16.

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0.0/ 10 priority

Sources & remediation

Patch / fix

Vendor / third-party advisories

https://github.com/python-zeroconf/python-zeroconf/security/advisories/GHSA-qc2x-6f54-m6h9

Other references

https://github.com/python-zeroconf/python-zeroconf/releases/tag/0.149.16

Weakness type (CWE)

CWE-130

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

zeroconf

Threat summary

3 mentions across 2 observed days
Momentum state: stable

What's happening

Technical details provided in 3 signals
Disclosure: 3 classified signals
Peaked at 2 mentions on most recent observed day (2026-07-17)
3 total mentions across 2 days

Affected systems

Vendors

paulsm

Products

zeroconf

Deep dive

Activity timeline3 mentions / 2d

Signal classification1 categories

Disclosure

3100.0%

Referenced assets3 URLs

By indicator

Classification over time

Date	Total	Labels

2026-06-22	1	Disclosure1
2026-07-17	2	Disclosure2

Full discourse3 posts

Infoflowcloud@infoflowcloud66d
Disclosure
🚨*CVE* 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/inco… https://www.cve.org/CVERecord?id=CVE-2026-48487 ----- Traducción: CVE-2026-48487 Zer… http://infoflow.cloud`
Post summary
The post announces CVE‑2026‑48487, highlighting a flaw in Zeroconf’s multicast DNS service discovery in versions before 0.149.16, but it does not provide any proof‑of‑concept, exploit code, or remediation details.
0000042
92 followersView on X
CVE@CVEnew66d
Disclosure
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/inco… https://www.cve.org/CVERecord?id=CVE-2026-48487
Post summary
The post documents a CVE in Zeroconf, naming the vulnerable functions and version range, but it provides no exploit, PoC, or patch details.
00000672
57.8K followersView on X
DailyCVE@dailycve91d
Disclosure
🔵 zeroconf (#python-zeroconf), Cache Corruption via Unvalidated RDLENGTH, #CVE-2026-48487 (Low) -DC-Jun2026-567 https://dailycve.com/zeroconf-python-zeroconf-cache-corruption-via-unvalidated-rdlength-cve-2026-48487-low-dc-jun2026-567/
Post summary
The post announces CVE‑2026‑48487, a low‑severity cache corruption issue in python‑zeroconf caused by an unvalidated RDLENGTH field. No PoC, exploit, or mitigation is provided.
0000046
216 followersView on X

CPE platform detail1 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

1 of 1 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	paulsm	zeroconf	-	python	-

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