Vulnerability in Xiaonuobase Snowy
CVE-2026-110214
Snowy 3.6.5 contains a hard-coded HMAC key vulnerability that allows unauthenticated attackers to forge download signatures for the /dev/file/download endpoint by using the published FILE_DOWNLOAD_SIGN_SECRET constant. Attackers can compute HMAC-SHA256 signatures of guessed file ids offline to download stored files such as avatars, editor images and attachments.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/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/@1ExmmukzRMWN7B4gQ4W-4Q/snowy-dev-file-access-control (third-party-advisory)
- github.com/xiaonuobase/Snowy/blob/v3.6.5/snowy-plugin/snowy-plugin-dev/src/main… (technical-description)
- github.com/xiaonuobase/Snowy/blob/v3.6.5/snowy-plugin/snowy-plugin-dev/src/main… (technical-description)
- github.com/xiaonuobase/Snowy/blob/v3.6.5/snowy-web-app/src/main/java/vip/xiaonu… (technical-description)
- www.vulncheck.com/advisories/snowy-3.6.5-hard-coded-download-signature-key-allo… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-110214?
- CVE-2026-110214 is a low-severity vulnerability in Xiaonuobase Snowy, classified under Use of Hard-coded Cryptographic Key. CVSS score: 3.7/10. Published 2026-10-13.
- How severe is CVE-2026-110214?
- Low severity. CVSS v3 base score is 3.7 out of 10.