medium6.5
CVE-2026-55497
Cloudreve: Denial of Service - Image decompression / pixel bomb in thumbnail & avatar decoding crashes the server
Impact
Cloudreve is a self-hosted file management and sharing system. Prior to 4.17.0, the built-in thumbnail and avatar image decoders limit compressed file size but do not limit decoded pixel dimensions, allowing an authenticated user to submit a small PNG, JPEG, or GIF that triggers an unbounded allocation and terminates the Cloudreve process through fatal out-of-memory behavior. This issue is fixed in version 4.17.0.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/cloudreve/Cloudreve/v4 | < 4.0.0-20260613024411-3607f79bb44c | 4.0.0-20260613024411-3607f79bb44c |
| go | github.com/cloudreve/Cloudreve/v3 | <= 3.0.0-20250225100611-da4e44b77af4 | none recorded |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-g9j2-8w95-3vwv
- https://github.com/cloudreve/cloudreve/security/advisories/GHSA-g9j2-8w95-3vwv
- https://github.com/cloudreve/cloudreve/commit/3607f79bb44c35d0be4fa8b6e24c0502b51415a9
- https://github.com/cloudreve/cloudreve/releases/tag/4.17.0