Auth bypass in Javahuang Surveyking
CVE-2026-111646
SurveyKing before 1.13.0 contains a missing authorization vulnerability that allows unauthenticated attackers to download any stored file by id through GET /api/public/preview/{attachmentId}. Attackers who know or derive time-ordered snowflake file ids can bypass shared, owner, and project checks in FileServiceImpl.loadFile to read private survey attachments and respondent uploads.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/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/surveyking-public-preview-unauth-file-read (third-party-advisory)
- github.com/javahuang/SurveyKing/blob/6e1fdd59f9b331ac90a26402ac86a002cc9155a9/s… (technical-description)
- github.com/javahuang/SurveyKing/blob/6e1fdd59f9b331ac90a26402ac86a002cc9155a9/s… (technical-description)
- github.com/javahuang/SurveyKing/commit/9489171d53e55ace2856a91af38034665c0064a4 (patch)
- github.com/javahuang/SurveyKing (product)
- VulnCheck Advisory: SurveyKing before 1.13.0 Unauthenticated File Download via /api/public/preview (third-party-advisory)
Frequently asked questions
- What is CVE-2026-111646?
- CVE-2026-111646 is a medium-severity vulnerability in Javahuang Surveyking, classified under Missing Authorization. CVSS score: 5.9/10. Published 2026-10-16.
- How severe is CVE-2026-111646?
- Medium severity. CVSS v3 base score is 5.9 out of 10.