{
    "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"
            }
        }
    }
}