{"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": "2026-09-21T20:52:11.164Z"}, "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"}}}}

{}

{"affected": [{"affectedData": [{"product": "joplin", "vendor": "laurent22", "versions": [{"status": "affected", "version": ">= 1.4.0, < 3.7.2"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "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."}], "id": "CVE-2026-49449", "lastModified": "2026-09-21T21:17:03.593", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 1.0, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-09-21T21:17:03.593", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/laurent22/joplin/commit/b15472bc9654a72101b34b79c9436b3d450e2c10"}, {"source": "security-advisories@github.com", "url": "https://github.com/laurent22/joplin/pull/15538"}, {"source": "security-advisories@github.com", "url": "https://github.com/laurent22/joplin/security/advisories/GHSA-9m2r-pv96-jxr3"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-200"}, {"lang": "en", "value": "CWE-522"}, {"lang": "en", "value": "CWE-829"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}