CVE-2026-110214
Snowy 3.6.5 Hard-coded Download Signature Key Allows Unauthenticated File Download
xiaonuobase Snowy
CVSS
6.3MediumExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 13 Oct 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.46%Chance of exploitation activity in the next 30 days, higher than 38% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
What fixes it
No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.
Description
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.
Text from CVE List
Affected versions 1
- Snowyaffected: 3.6.5 through 3.6.5CVE List
References 5
- vulncheck.com/advisories/snowy-3.6.5-hard-coded-download-signature-key-allows-unauthenticated-file-downloadAdvisoryvia CVE List
- hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/snowy-dev-file-access-controlExploitvia CVE List
- github.com/xiaonuobase/Snowy/blob/v3.6.5/snowy-plugin/snowy-plugin-dev/src/main/java/vip/xiaonuo/dev/modular/file/service/impl/DevFileServiceImpl.java#L419-L445Referencevia CVE List
- github.com/xiaonuobase/Snowy/blob/v3.6.5/snowy-plugin/snowy-plugin-dev/src/main/java/vip/xiaonuo/dev/modular/file/service/impl/DevFileServiceImpl.java#L78Referencevia CVE List
- github.com/xiaonuobase/Snowy/blob/v3.6.5/snowy-web-app/src/main/java/vip/xiaonuo/core/config/GlobalConfigure.java#L174-L175Referencevia CVE List