{"id":"CVE-2026-46650","published":"2026-09-21T22:16:56.480","lastModified":"2026-09-21T22:16:56.480","description":"Joplin is an open source note-taking and to-do application that organises notes and lists into notebooks. Prior to 3.7.2, isAcceptedUrl() in packages/renderer/htmlUtils.ts uses an unanchored regular expression for internal resource URLs, allowing a javascript: URL containing a matching 32-character path fragment to pass validation and be emitted into an HTML note's link. A low-privileged Joplin Server user can publish the crafted HTML note as a public share. In the current build, ordinary left-click is blocked; demonstrated execution requires middle-click or Open in new tab in an older or non-hardened browser because current Chrome and Firefox block javascript: new-tab navigation. When execution succeeds, the script runs in the Joplin Server origin, can read page-visible content, and can make authenticated same-origin requests when the victim is signed in. This issue is fixed in version 3.7.2.","cvssScore":4.4,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N","cwes":["CWE-79"],"vendors":[],"products":[],"references":[{"url":"https://github.com/laurent22/joplin/commit/9fdc2d4adbd7b7326a2d0dcc32e12b705bfc285e","tags":[]},{"url":"https://github.com/laurent22/joplin/pull/15435","tags":[]},{"url":"https://github.com/laurent22/joplin/security/advisories/GHSA-x9vj-jrqf-9wcm","tags":[]}],"exploitRefs":[{"url":"https://github.com/laurent22/joplin/commit/9fdc2d4adbd7b7326a2d0dcc32e12b705bfc285e","tags":[]},{"url":"https://github.com/laurent22/joplin/pull/15435","tags":[]},{"url":"https://github.com/laurent22/joplin/security/advisories/GHSA-x9vj-jrqf-9wcm","tags":[]}],"hasPoc":true,"ai":{"summary":"The flaw allows a low-privileged user to inject malicious JavaScript via crafted HTML notes, potentially leading to script execution in the Joplin Server origin.","exploitability":"Exploitation requires publishing a specific crafted note and relies on browser behavior; moderately difficult with current browser protections.","blast_radius":"If exploited, an attacker could read page-visible content and make authenticated requests, impacting user privacy and data integrity.","remediation":"Update to Joplin version 3.7.2 or later to mitigate the vulnerability.","tags":["rce","web","auth-bypass","javascript"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-09-22T06:31:14.212Z"}}