CVE-2026-77929

ClipBucket v5 before 5.5.3-#182 contains a file upload vulnerability that allows authenticated users to achieve remote code execution by uploading a PHP file with valid image magic bytes through the photo upload endpoint. The FileUpload::manageFile() function in fileupload.class.php fails to update the file extension after MIME validation, allowing an attacker-controlled .php extension to persist on disk and execute as PHP via PHP-FPM when the uploaded file is retrieved.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/MacWarrior/clipbucket-v5/commit/61cce55ab26ef88fb782dfde47b44c17c56978cd
https://github.com/MacWarrior/clipbucket-v5/releases/tag/5.5.3-%23182
https://www.vulncheck.com/advisories/clipbucket-remote-code-execution-via-photo-upload-endpoint

Configurations

No configuration.

History

18 Sep 2026, 15:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-18 15:17

Updated : 2026-09-22 20:53

NVD link : CVE-2026-77929

Mitre link : CVE-2026-77929

CVE.ORG link : CVE-2026-77929

JSON object : View

Products Affected

No product.

CWE

CWE-434

Unrestricted Upload of File with Dangerous Type

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