by Kastro
Paper/Archive/CVE-2026-46649

CVE-2026-46649

laurent22 joplin — Joplin: SSO Auth Code Login Missing Rate Limiting — 9-Digit Numeric Code Brute-Forceable via Unprotected Endpoint

EPSS 0.5%public exploitCVSS 9.1
critical.is priorityof 100
46
CVSS 9.1 (CNA)9.1 / 10 × 3027.3Not in CISA KEV+300.0EPSS percentile 42.9.429 × 208.6Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
joplin< 3.7.2–CNA

Scores by source

GitHub_M (CNA)9.1CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: total

References

exploitgithub.com/laurent22/joplin/security/advisories/GHSA-6vwc-4hrg-qp5hrefgithub.com/laurent22/joplin/pull/15433refgithub.com/laurent22/joplin/commit/fd8c1fb53f98f689e846dc164e39f307f09b684drefgithub.com/laurent22/joplin/tree/v3.7.2