CVE-2026-46649

Critical

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 Server's GET /api/login_with_code/:id endpoint accepts a nine-digit SSO authentication code with a ten-minute lifetime without applying limiterLoginBruteForce. An unauthenticated attacker who targets a user during an active SSO login can make unlimited guesses, and a correct code returns a full session token that permits access to and modification of the user's notes, notebooks, and account settings. This issue is fixed in version 3.7.2.

SeverityCritical
CVSS9.1
Exploit probability—
ProductLaurent22 Joplin
PublishedSep 21, 2026
First seenSep 21, 2026
Weakness typeCWE-307CWE-307

How to fix

Sources list no fixed version or patch link for this vulnerability.

Affected products

ProductAffected versionsFixed in
laurent22 joplin< 3.7.2—

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