Auth bypass in Qiantongtech Qknow
CVE-2026-111694
qKnow through 2.4.3 contains a missing authentication vulnerability that allows unauthenticated remote attackers to access /flyflow workflow integration endpoints permitted in SecurityConfig. Attackers can POST sequential userId values to /flyflow/userById or call roleAll and deptListByParentDeptId to enumerate user phone numbers, roles, and department structure.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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/qknow-flyflow-unauth-user-directory-disclosure (third-party-advisory)
- github.com/qiantongtech/qKnow/blob/v2.4.3/qknow-framework/qknow-security/src/ma… (technical-description)
- github.com/qiantongtech/qKnow/blob/v2.4.3/qknow-module-system/qknow-module-syst… (technical-description)
- github.com/qiantongtech/qKnow (product)
- www.vulncheck.com/advisories/qknow-through-2.4.3-missing-authentication-via-fly… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-111694?
- CVE-2026-111694 is a medium-severity vulnerability in Qiantongtech Qknow, classified under Missing Authentication for Critical Function. CVSS score: 5.3/10. Published 2026-10-16.
- How severe is CVE-2026-111694?
- Medium severity. CVSS v3 base score is 5.3 out of 10.