CVE-2026-55497
MEDIUMCloudreve: Server crash through image decompression/pixel bomb in thumbnail & avatar decoding (DoS)
Title source: cnaDescription
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.
References (3)
Core 3
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/cloudreve/cloudreve/security/advisories/GHSA-g9j2-8w95-3vwv
X_Refsource_Misc x_refsource_misc
https://github.com/cloudreve/cloudreve/commit/3607f79bb44c35d0be4fa8b6e24c0502b51415a9
X_Refsource_Misc x_refsource_misc
https://github.com/cloudreve/cloudreve/releases/tag/4.17.0
Scores
CVSS v3
6.5
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-400
CWE-409
CWE-770
Status
published
Products (1)
cloudreve/cloudreve
< 4.17.0
Published
Jul 31, 2026
Tracked Since
Jul 31, 2026