CVE-2026-40602 (GCVE-0-2026-40602)
Vulnerability from cvelistv5
Published
2026-04-21 17:40
Modified
2026-04-21 19:02
Severity ?
VLAI Severity ?
EPSS score ?
CWE
Summary
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.
References
| URL | Tags | |
|---|---|---|
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| home-assistant-ecosystem | home-assistant-cli |
Version: < 1.0.0 |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-40602",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-04-21T19:01:54.397388Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-04-21T19:02:03.968Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "home-assistant-cli",
"vendor": "home-assistant-ecosystem",
"versions": [
{
"status": "affected",
"version": "\u003c 1.0.0"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "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\u0027s internals and extended the scope of templating beyond the intended usage. This vulnerability is fixed in 1.0.0."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "NONE",
"baseScore": 5.6,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "HIGH",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-94",
"description": "CWE-94: Improper Control of Generation of Code (\u0027Code Injection\u0027)",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-1336",
"description": "CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-04-21T17:40:10.251Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/home-assistant-ecosystem/home-assistant-cli/security/advisories/GHSA-33qf-q99x-wpm8",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/home-assistant-ecosystem/home-assistant-cli/security/advisories/GHSA-33qf-q99x-wpm8"
},
{
"name": "https://github.com/home-assistant-ecosystem/home-assistant-cli/pull/453",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/home-assistant-ecosystem/home-assistant-cli/pull/453"
}
],
"source": {
"advisory": "GHSA-33qf-q99x-wpm8",
"discovery": "UNKNOWN"
},
"title": "hass-cli: Handling of user-supplied Jinja2 templates"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-40602",
"datePublished": "2026-04-21T17:40:10.251Z",
"dateReserved": "2026-04-14T14:07:59.641Z",
"dateUpdated": "2026-04-21T19:02:03.968Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"cna\": {\"title\": \"hass-cli: Handling of user-supplied Jinja2 templates\", \"problemTypes\": [{\"descriptions\": [{\"cweId\": \"CWE-94\", \"lang\": \"en\", \"description\": \"CWE-94: Improper Control of Generation of Code (\u0027Code Injection\u0027)\", \"type\": \"CWE\"}]}, {\"descriptions\": [{\"cweId\": \"CWE-1336\", \"lang\": \"en\", \"description\": \"CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine\", \"type\": \"CWE\"}]}], \"metrics\": [{\"cvssV3_1\": {\"attackComplexity\": \"HIGH\", \"attackVector\": \"LOCAL\", \"availabilityImpact\": \"NONE\", \"baseScore\": 5.6, \"baseSeverity\": \"MEDIUM\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"HIGH\", \"privilegesRequired\": \"HIGH\", \"scope\": \"UNCHANGED\", \"userInteraction\": \"REQUIRED\", \"vectorString\": \"CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N\", \"version\": \"3.1\"}}], \"references\": [{\"name\": \"https://github.com/home-assistant-ecosystem/home-assistant-cli/security/advisories/GHSA-33qf-q99x-wpm8\", \"tags\": [\"x_refsource_CONFIRM\"], \"url\": \"https://github.com/home-assistant-ecosystem/home-assistant-cli/security/advisories/GHSA-33qf-q99x-wpm8\"}, {\"name\": \"https://github.com/home-assistant-ecosystem/home-assistant-cli/pull/453\", \"tags\": [\"x_refsource_MISC\"], \"url\": \"https://github.com/home-assistant-ecosystem/home-assistant-cli/pull/453\"}], \"affected\": [{\"vendor\": \"home-assistant-ecosystem\", \"product\": \"home-assistant-cli\", \"versions\": [{\"version\": \"\u003c 1.0.0\", \"status\": \"affected\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-04-21T17:40:10.251Z\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"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\u0027s internals and extended the scope of templating beyond the intended usage. This vulnerability is fixed in 1.0.0.\"}], \"source\": {\"advisory\": \"GHSA-33qf-q99x-wpm8\", \"discovery\": \"UNKNOWN\"}}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-40602\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-04-21T19:01:54.397388Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-04-21T19:01:58.525Z\"}}]}",
"cveMetadata": "{\"cveId\": \"CVE-2026-40602\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"GitHub_M\", \"dateReserved\": \"2026-04-14T14:07:59.641Z\", \"datePublished\": \"2026-04-21T17:40:10.251Z\", \"dateUpdated\": \"2026-04-21T19:02:03.968Z\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…