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.

References

https://github.com/laurent22/joplin/tree/v3.7.2

https://github.com/laurent22/joplin/security/advisories/GHSA-6vwc-4hrg-qp5h

https://github.com/laurent22/joplin/pull/15433

https://github.com/laurent22/joplin/commit/fd8c1fb53f98f689e846dc164e39f307f09b684d

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-84171

Details

Source: Mitre, NVD

Published: 2026-09-21

Updated: 2026-09-28

Risk Information

CVSS v2

Base Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 9.1

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

Severity: Critical

CVSS v4

Base Score: 9.1

Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Severity: Critical

EPSS

EPSS: 0.005