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CVE-2026-46649: joplin

Severity

9.1 (CRITICAL)

Vendor

LAURENT22

Affected versions

< 3.7.2

Fixed version

3.7.2.

Patch status

Patched

Published

2026-09-21T21:17:03.323

Modified

2026-09-21T21:17:03.323

Why it matters

This matters because the issue affects identity or token handling. Successful exploitation could allow unauthorized authentication, client manipulation, or access to protected services.

Recommended admin actions

• Prioritize validation immediately due to critical CVSS severity.
• Compare installed versions against the affected version range in the advisory.
• Treat internet-facing systems as higher priority.
• Review logs for suspicious activity related to the affected application or component.

Technical summary

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.

View the official NVD record for CVE-2026-46649

CVE data is sourced from NVD/CNA records and optional enrichment. Validate against the vendor advisory before taking production action.