CVE-2026-40602hass-cli: Handling of user-supplied Jinja2 templates
- 5.6MediumCVSS base score
- 0.10%Exploitation in 30 daysEPSS · top 99% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
The Home Assistant Command-line interface (hass-cli) is a command-line tool for Home Assistant. Up to 1.0.0 of home-assitant-cli an unrestricted environment was used to handle Jninja2 templates instead of a sandboxed one. The user-supplied input within Jinja2 templates was rendered locally with no restrictions. This gave users access to Python's internals and extended the scope of templating beyond the intended usage. This vulnerability is fixed in 1.0.0.
Timeline
ID reserved
By GitHub_M
- 7 days later
· 7 days later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Medium5.6 | CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N |
| NVDNVD · Analyzed | 3.1 | Medium5.6 | CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N |
- EPSS (exploitation in 30 days)
- 0.10% · top 99% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.6.
Affected products
home-assistant-ecosystem · home-assistant-cli
- affected < 1.0.0
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- PyPIhomeassistant-cliGHSA-33qf-q99x-wpm8 (opens in a new tab)
References
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)
- EUVD EUVD-2026-24211 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-33qf-q99x-wpm8 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-40602)Record last updated .