CVE-2026-55497

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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/cloudreve/cloudreve/commit/3607f79bb44c35d0be4fa8b6e24c0502b51415a9
https://github.com/cloudreve/cloudreve/releases/tag/4.17.0
https://github.com/cloudreve/cloudreve/security/advisories/GHSA-g9j2-8w95-3vwv
https://github.com/cloudreve/cloudreve/security/advisories/GHSA-g9j2-8w95-3vwv

Configurations

No configuration.

History

31 Jul 2026, 16:17

Type	Values Removed	Values Added
References	~~() https://github.com/cloudreve/cloudreve/security/advisories/GHSA-g9j2-8w95-3vwv -~~	() https://github.com/cloudreve/cloudreve/security/advisories/GHSA-g9j2-8w95-3vwv -

31 Jul 2026, 04:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-31 04:17

Updated : 2026-07-31 16:17

NVD link : CVE-2026-55497

Mitre link : CVE-2026-55497

CVE.ORG link : CVE-2026-55497

JSON object : View

Products Affected

No product.

CWE

CWE-400

Uncontrolled Resource Consumption

CWE-409

Improper Handling of Highly Compressed Data (Data Amplification)

CWE-770

Allocation of Resources Without Limits or Throttling

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