CVE-2026-91129Home Assistant: mDNS Server-Side Request Forgery
Updated under an hour ago ()
Does this affect you?
It affects home-assistant core. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
Home Assistant is open source home automation software focused on local control and privacy. Prior to 2026.2.3, the IPP integration automatically processed unauthenticated _ipp._tcp.local mDNS announcements in homeassistant/components/ipp/config_flow.py, where async_step_zeroconf passed attacker-controlled host, port, and base_path values to validate_input for printer metadata retrieval. Because the shared HTTP client followed attacker-controlled cross-origin redirects without blocking loopback targets, a local-network attacker could redirect the request to 127.0.0.1 or another internal service without user interaction or prior IPP configuration. This issue is fixed in version 2026.2.3.
- CVSS
- 5.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- Weakness (CWE)
- CWE-918
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Awaiting Analysis
- Record last updated
- Sep 24, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
home-assistant core home_assistant:core (from the name) | before 2026.2.3 | CNA record |
References
- https://github.com/home-assistant/core/security/advisories/GHSA-4ghv-53cq-7wp3x-refsource-confirm
- https://github.com/home-assistant/core/pull/162941x-refsource-misc
- https://github.com/home-assistant/core/commit/0f3c7ca2772b605c0f3c09c88f35e527ea6ea560x-refsource-misc
- https://github.com/home-assistant/core/commit/815c708d19aa0c7f59f9ee318b613a5e481a42b3x-refsource-misc
- https://github.com/home-assistant/core/releases/tag/2026.2.3x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.