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vuln-cve/data/2026/33xxx/CVE-2026-33170.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-33170",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-03-17T21:17:08.888Z",
"datePublished": "2026-03-23T23:09:48.923Z",
"dateUpdated": "2026-03-25T19:20:28.280Z"
},
"containers": {
"cna": {
"title": "Rails Active Support has a possible XSS vulnerability in SafeBuffer#%",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"lang": "en",
"description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"privilegesRequired": "NONE",
"userInteraction": "PASSIVE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "LOW",
"vulnAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"subAvailabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
"version": "4.0"
}
}
],
"references": [
{
"name": "https://github.com/rails/rails/security/advisories/GHSA-89vf-4333-qx8v",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/rails/rails/security/advisories/GHSA-89vf-4333-qx8v"
},
{
"name": "https://github.com/rails/rails/commit/50d732af3b7c8aaf63cbcca0becbc00279b215b7",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/rails/rails/commit/50d732af3b7c8aaf63cbcca0becbc00279b215b7"
},
{
"name": "https://github.com/rails/rails/commit/6e8a81108001d58043de9e54a06fca58962fc2db",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/rails/rails/commit/6e8a81108001d58043de9e54a06fca58962fc2db"
},
{
"name": "https://github.com/rails/rails/commit/c1ad0e8e1972032f3395853a5e99cea035035beb",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/rails/rails/commit/c1ad0e8e1972032f3395853a5e99cea035035beb"
},
{
"name": "https://github.com/rails/rails/releases/tag/v7.2.3.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/rails/rails/releases/tag/v7.2.3.1"
},
{
"name": "https://github.com/rails/rails/releases/tag/v8.0.4.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/rails/rails/releases/tag/v8.0.4.1"
},
{
"name": "https://github.com/rails/rails/releases/tag/v8.1.2.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/rails/rails/releases/tag/v8.1.2.1"
}
],
"affected": [
{
"vendor": "rails",
"product": "activesupport",
"versions": [
{
"version": ">= 8.1.0.beta1, < 8.1.2.1",
"status": "affected"
},
{
"version": ">= 8.0.0.beta1, < 8.0.4.1",
"status": "affected"
},
{
"version": "< 7.2.3.1",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-03-23T23:19:36.467Z"
},
"descriptions": [
{
"lang": "en",
"value": "Active Support is a toolkit of support libraries and Ruby core extensions extracted from the Rails framework. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, `SafeBuffer#%` does not propagate the `@html_unsafe` flag to the newly created buffer. If a `SafeBuffer` is mutated in place (e.g. via `gsub!`) and then formatted with `%` using untrusted arguments, the result incorrectly reports `html_safe? == true`, bypassing ERB auto-escaping and possibly leading to XSS. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch."
}
],
"source": {
"advisory": "GHSA-89vf-4333-qx8v",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-03-25T19:20:16.086015Z",
"id": "CVE-2026-33170",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-03-25T19:20:28.280Z"
}
}
]
}
}