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vuln-cve/data/2026/59xxx/CVE-2026-59929.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-59929",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-07-07T18:20:06.126Z",
"datePublished": "2026-07-08T16:20:38.139Z",
"dateUpdated": "2026-07-09T14:41:36.793Z"
},
"containers": {
"cna": {
"title": "Mistune renderers/html.safe_url: HARMFUL_PROTOCOLS list misses legacy and chained schemes that historically chain to `javascript:` execution",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"lang": "en",
"description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-184",
"lang": "en",
"description": "CWE-184: Incomplete List of Disallowed Inputs",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.1,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
"version": "3.1"
}
}
],
"references": [
{
"name": "https://github.com/lepture/mistune/security/advisories/GHSA-qfrw-5rxm-mhh2",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/lepture/mistune/security/advisories/GHSA-qfrw-5rxm-mhh2"
},
{
"name": "https://github.com/lepture/mistune/commit/c7101fcbb6e8790e8e39157c5ca2238fc6dd6cbc",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/lepture/mistune/commit/c7101fcbb6e8790e8e39157c5ca2238fc6dd6cbc"
},
{
"name": "https://github.com/lepture/mistune/releases/tag/v3.3.0",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/lepture/mistune/releases/tag/v3.3.0"
}
],
"affected": [
{
"vendor": "lepture",
"product": "mistune",
"versions": [
{
"version": "< 3.3.0",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-07-08T16:20:38.139Z"
},
"descriptions": [
{
"lang": "en",
"value": "Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, the safe_url filter in src/mistune/renderers/html.py blocks only javascript:, vbscript:, file:, and data: schemes, allowing legacy or chained schemes such as feed:, view-source:, jar:, livescript:, mocha:, ms-its:, mk:, and res: to reach rendered href and src attributes and potentially execute script in affected user agents. This issue is fixed in version 3.3.0."
}
],
"source": {
"advisory": "GHSA-qfrw-5rxm-mhh2",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-07-09T14:21:09.261426Z",
"id": "CVE-2026-59929",
"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": "2026-07-09T14:41:36.793Z"
}
}
]
}
}