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vuln-cve/data/2026/49xxx/CVE-2026-49449.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-49449",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-05-30T02:43:33.106Z",
"datePublished": "2026-09-21T20:52:11.164Z",
"dateUpdated": "2026-09-28T20:15:24.088Z"
},
"containers": {
"cna": {
"title": "Joplin: KaTeX `trust:true` enables URL-allowlist bypass leading to NTLMv2 credential theft via UNC path on Windows",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-200",
"lang": "en",
"description": "CWE-200: Exposure of Sensitive Information to an Unauthorized Actor",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-522",
"lang": "en",
"description": "CWE-522: Insufficiently Protected Credentials",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-829",
"lang": "en",
"description": "CWE-829: Inclusion of Functionality from Untrusted Control Sphere",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "NONE",
"baseScore": 2.5,
"baseSeverity": "LOW",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N",
"version": "3.1"
}
}
],
"references": [
{
"name": "https://github.com/laurent22/joplin/security/advisories/GHSA-9m2r-pv96-jxr3",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/laurent22/joplin/security/advisories/GHSA-9m2r-pv96-jxr3"
},
{
"name": "https://github.com/laurent22/joplin/pull/15538",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/laurent22/joplin/pull/15538"
},
{
"name": "https://github.com/laurent22/joplin/commit/b15472bc9654a72101b34b79c9436b3d450e2c10",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/laurent22/joplin/commit/b15472bc9654a72101b34b79c9436b3d450e2c10"
}
],
"affected": [
{
"vendor": "laurent22",
"product": "joplin",
"versions": [
{
"version": ">= 1.4.0, < 3.7.2",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-09-21T20:52:11.164Z"
},
"descriptions": [
{
"lang": "en",
"value": "Joplin is an open source note-taking and to-do application that organises notes and lists into notebooks. From 1.4.0 until 3.7.2, packages/renderer/MdToHtml/rules/katex.ts enables KaTeX's trust option for note content, allowing a note author to place a \\href URL into rendered output without passing Joplin's normal URL allowlist. On Windows, clicking a link whose target is an attacker-controlled UNC path causes pathExists() to initiate SMB authentication and disclose the current user's NTLMv2 challenge-response without a warning. The unfiltered URL can also invoke other registered URL handlers, but the credential disclosure through KaTeX \\href is the distinguishing demonstrated impact. This issue is fixed in version 3.7.2."
}
],
"source": {
"advisory": "GHSA-9m2r-pv96-jxr3",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"references": [
{
"url": "https://github.com/laurent22/joplin/security/advisories/GHSA-9m2r-pv96-jxr3",
"tags": [
"exploit"
]
}
],
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-09-28T20:15:08.128891Z",
"id": "CVE-2026-49449",
"options": [
{
"Exploitation": "poc"
},
{
"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": "2026-09-28T20:15:24.088Z"
}
}
]
}
}