laurent22 Joplin up to 3.7.1 Update Verification package.json NsisUpdater.verifySignature publisherName data authenticity

Summaryinfo

A vulnerability marked as critical has been reported in laurent22 Joplin up to 3.7.1. This vulnerability affects the function NsisUpdater.verifySignature of the file packages/app-desktop/package.json of the component Update Verification. Performing a manipulation of the argument publisherName results in data authenticity. This vulnerability is cataloged as CVE-2026-49450. It is possible to initiate the attack remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in laurent22 Joplin up to 3.7.1. This affects the function NsisUpdater.verifySignature of the file packages/app-desktop/package.json of the component Update Verification. The manipulation of the argument publisherName with an unknown input leads to a data authenticity vulnerability. CWE is classifying the issue as CWE-345. The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data. This is going to have an impact on confidentiality, integrity, and availability. 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, Joplin Desktop for Windows omits publisherName from packages/app-desktop/package.json, so the generated app-update.yml causes NsisUpdater.verifySignature() to skip comparison of a downloaded update's Authenticode signer with Joplin's signer. An attacker who controls the update delivery path can replace the update metadata and installer, and the client accepts an installer signed by another publisher or left unsigned after the user approves installation. Successful exploitation runs attacker-controlled code with the user's privileges and can compromise notes, credentials, and local data. This issue is fixed in version 3.7.2.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-49450 since 05/30/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

By approaching the search of inurl:packages/app-desktop/package.json it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 3.7.2 eliminates this vulnerability.

Be aware that VulDB is the high quality source for vulnerability data.

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

Be aware that VulDB is the high quality source for vulnerability data.

Discussion