Auth bypass in Kuaifan Dootask
CVE-2026-111640
DooTask through 1.9.66 contains a missing authorization vulnerability in WebSocketDialog::checkDialog() that skips the membership check for dialogs with group_type 'okr'. Authenticated users can supply the dialog_id of OKR comment dialogs to msg__list, msg__one, or msg__send* endpoints to read and inject messages.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- hackmd.io/@hieuPenguinnn/dootask-okr-dialog-missing-membership-check (third-party-advisory)
- github.com/kuaifan/dootask/blob/v1.9.66/app/Models/WebSocketDialog.php (technical-description)
- www.vulncheck.com/advisories/dootask-through-1.9.66-missing-authorization-in-ok… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-111640?
- CVE-2026-111640 is a medium-severity vulnerability in Kuaifan Dootask, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.4/10. Published 2026-10-16.
- How severe is CVE-2026-111640?
- Medium severity. CVSS v3 base score is 5.4 out of 10.