{"id":"CVE-2026-49449","title":"Joplin is an open source note-taking and to-do application that organises notes and lists into notebooks","summary":"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 au…","severity":"low","cvss":2.5,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N","cwe":["CWE-200","CWE-522","CWE-829"],"vendor":"laurent22","product":"joplin","affected":["joplin >= 1.4.0, < 3.7.2"],"published":"2026-09-21","updated":"2026-09-21","sourceUpdated":"2026-09-21T21:17:03.593","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-49449","references":[{"url":"https://github.com/laurent22/joplin/commit/b15472bc9654a72101b34b79c9436b3d450e2c10","label":"security-advisories@github.com"},{"url":"https://github.com/laurent22/joplin/pull/15538","label":"security-advisories@github.com"},{"url":"https://github.com/laurent22/joplin/security/advisories/GHSA-9m2r-pv96-jxr3","label":"security-advisories@github.com"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-21T21:53:57.416Z","slug":"CVE-2026-49449","body":"## Overview\n\nJoplin 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":14,"depthScoreParts":{"impact":13.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}