CVE-2026-111646
HIGH 8.2SurveyKing 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.
Severe if exploited (CVSS 8.2), but no known exploitation and low modeled probability. Patch on a normal cadence.
Exploitation likelihood
0.4%chance of exploitation in 30 days · 32nd percentile
Impact if exploited
8.2CVSS 4.0 · HIGH
- ConfidentialityHigh
- IntegrityNone
- AvailabilityNone
What an attacker needs
- ✓Access: Reachable over the network — no local access needed
- ✓Privileges: No account or privileges required
- ✓User interaction: No user interaction needed
- ⚠Complexity: Needs a race window or specific setup
- ⚠Requirements: Specific conditions must be present
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept
No public PoC is currently catalogued.
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Data snapshot:
Weakness (CWE)
- CWE-862: Missing Authorization
CVSS vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
References and research data (JSON)
All CVSS metrics
- HIGH 8.2 v4.0 · CNA Primary
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N - MEDIUM 5.9 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - HIGH 8.2 v4.0 · NVD Secondary
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - MEDIUM 5.9 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
References
Patches & mitigations
- https://github.com/javahuang/SurveyKing/commit/9489171d53e55ace2856a91af38034665c0064a4 CVE record · VulnCheck · Updated 2026-10-16T17:39:15.125Z
NVD · CVE-2026-111646 · Updated 2026-10-16T22:17:21.607
Advisories
- https://hackmd.io/@hieuPenguinnn/surveyking-public-preview-unauth-file-read CVE record · VulnCheck · Updated 2026-10-16T17:39:15.125Z
NVD · CVE-2026-111646 · Updated 2026-10-16T22:17:21.607 - https://www.vulncheck.com/advisories/surveyking-before-1.13.0-unauthenticated-file-download-via-api-public-preview CVE record · VulnCheck · Updated 2026-10-16T17:39:15.125Z
NVD · CVE-2026-111646 · Updated 2026-10-16T22:17:21.607 - https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-103068 EUVD · EUVD-2026-103068
Technical & other
- https://github.com/javahuang/SurveyKing/blob/6e1fdd59f9b331ac90a26402ac86a002cc9155a9/server/api/src/main/java/cn/surveyking/server/api/SurveyApi.java#L99-L107 CVE record · VulnCheck · Updated 2026-10-16T17:39:15.125Z
NVD · CVE-2026-111646 · Updated 2026-10-16T22:17:21.607 - https://github.com/javahuang/SurveyKing/blob/6e1fdd59f9b331ac90a26402ac86a002cc9155a9/server/rdbms/src/main/java/cn/surveyking/server/impl/FileServiceImpl.java#L197-L228 CVE record · VulnCheck · Updated 2026-10-16T17:39:15.125Z
NVD · CVE-2026-111646 · Updated 2026-10-16T22:17:21.607 - https://github.com/javahuang/SurveyKing CVE record · VulnCheck · Updated 2026-10-16T17:39:15.125Z
NVD · CVE-2026-111646 · Updated 2026-10-16T22:17:21.607