What’s Vulnerable › Vulnerabilities

CVE-2026-111646: SurveyKing before 1.13.0 Unauthenticated File Download via /api/public/preview

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-16 · updated 2026-10-16
• Weakness: CWE-862

Description

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.

Affected products

• javahuang SurveyKing: before 1.13.0 — fixed in 1.13.0

How to fix

Upgrade to a fixed version: javahuang SurveyKing 1.13.0. Check the vendor advisory for mitigations.

References

• https://github.com/javahuang/SurveyKing
• https://github.com/javahuang/SurveyKing/blob/6e1fdd59f9b331ac90a26402ac86a002cc9155a9/server/api/src/main/java/cn/surveyking/server/api/SurveyApi.java#L99-L107
• https://github.com/javahuang/SurveyKing/blob/6e1fdd59f9b331ac90a26402ac86a002cc9155a9/server/rdbms/src/main/java/cn/surveyking/server/impl/FileServiceImpl.java#L197-L228
• https://github.com/javahuang/SurveyKing/commit/9489171d53e55ace2856a91af38034665c0064a4
• https://hackmd.io/@hieuPenguinnn/surveyking-public-preview-unauth-file-read
• https://www.vulncheck.com/advisories/surveyking-before-1.13.0-unauthenticated-file-download-via-api-public-preview

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