Joplin desktop Windows auto-updater accepts signed installer from any publisher because app-update.yml has no publisherName

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-49450
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-21 21:17:03 UTC
Updated2026-09-23 18:30:42 UTC
DescriptionJoplin 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.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from [email protected]

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

EPSS: 0.001820000 probability, percentile 0.068410000 (date 2026-09-24)

Problem Types: CWE-345 | CWE-353 | CWE-494 | CWE-345 CWE-345: Insufficient Verification of Data Authenticity | CWE-353 CWE-353: Missing Support for Integrity Check | CWE-494 CWE-494: Download of Code Without Integrity Check

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.1HIGHCVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1CNADECLARED7.1HIGHCVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Adjacent
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Laurent22 Joplin affected < 3.7.2 Not specified

References

ReferenceSourceLinkTags
github.com/laurent22/joplin/pull/15539 [email protected] github.com
github.com/laurent22/joplin/security/advisories/GHSA-9wp7-hr9m-3273 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/laurent22/joplin/commit/853659edf575c4f526c2b196e0629462aee9df28 [email protected] github.com
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