CVE-2026-91129
Home Assistant: mDNS Server-Side Request Forgery
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
Description
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Medium5.4 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
| NVDNVD · Awaiting Analysis | 3.1 | Medium5.4 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.29% · top 78% of all CVEs (5 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.4.
Weakness
Affected products
- affected < 2026.2.3
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- PyPIhomeassistantGHSA-4ghv-53cq-7wp3 (opens in a new tab)
References (5)
- https://github.com/home-assistant/core/security/advisories/GHSA-4ghv-53cq-7wp3 (opens in a new tab)x_refsource_CONFIRMexploit
- https://github.com/home-assistant/core/pull/162941 (opens in a new tab)x_refsource_MISC
- https://github.com/home-assistant/core/commit/0f3c7ca2772b605c0f3c09c88f35e527ea6ea560 (opens in a new tab)x_refsource_MISC
- https://github.com/home-assistant/core/commit/815c708d19aa0c7f59f9ee318b613a5e481a42b3 (opens in a new tab)x_refsource_MISC
- https://github.com/home-assistant/core/releases/tag/2026.2.3 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-4ghv-53cq-7wp3 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-91129)Record last updated .