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Vulnerability record · CVE-2026-49450 · published 21 September 2026

CVE-2026-49450: Insufficient verification of data authenticity vulnerability

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.

7.1 CVSS 3.1 High EPSS 0.18% · top 93.1% CWE-345 · Insufficient verification of data authenticityCWE-353 · CWE-353 Deferred
7.1CVSS 3.1 base score
0.18%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
23 Sep 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

References

LinkTags
https://github.com/laurent22/joplin/commit/853659edf575c4f526c2b196e0629462aee9df28
https://github.com/laurent22/joplin/pull/15539
https://github.com/laurent22/joplin/security/advisories/GHSA-9wp7-hr9m-3273
https://github.com/laurent22/joplin/security/advisories/GHSA-9wp7-hr9m-3273

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-49450), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.