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CVE-2026-49450

7.1 · HIGH

Joplin is an open source note-taking and to-do application that organises notes and lists into notebooks.

Published Sep 21, 2026CWE-345EPSS 0.18%

Overview

CVE-2026-49450 is a high-severity vulnerability. It was published on September 21, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/laurent22/joplin/commit/853659edf575c4f526c2b196e0629462aee9df28GitHubgithub.com/laurent22/joplin/pull/15539GitHubgithub.com/laurent22/joplin/security/advisories/GHSA-9wp7-hr9m-3273GitHubgithub.com/laurent22/joplin/security/advisories/GHSA-9wp7-hr9m-3273

How CyberStrike helps

Frequently asked questions

What is CVE-2026-49450?

CVE-2026-49450 is a high-severity vulnerability. It was published on September 21, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2026-49450?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-49450?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-49450?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-49450 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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