laurent22 Joplin up to 3.7.1 URL Validation htmlUtils.ts isAcceptedUrl cross-domain policy

Summaryinfo

A vulnerability was found in laurent22 Joplin up to 3.7.1. It has been classified as problematic. This vulnerability affects the function isAcceptedUrl of the file packages/renderer/htmlUtils.ts of the component URL Validation. This manipulation causes cross-domain policy. This vulnerability is handled as CVE-2026-46650. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in laurent22 Joplin up to 3.7.1. It has been declared as problematic. Affected by this vulnerability is the function isAcceptedUrl of the file packages/renderer/htmlUtils.ts of the component URL Validation. The manipulation with an unknown input leads to a cross-domain policy vulnerability. The CWE definition for the vulnerability is CWE-942. The product uses a cross-domain policy file that includes domains that should not be trusted. As an impact it is known to affect confidentiality. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-46650 since 05/15/2026. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available.

Upgrading to version 3.7.2 eliminates this vulnerability.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• laurent22

Name

• Joplin

Version

• 3.7.0
• 3.7.1

Website

• Product: https://github.com/laurent22/joplin/

CPE 2.3info

• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion