CVE-2026-77929 ClipBucket < 5.5.3-#182 Remote Code Execution via Photo Upload Endpoint
Authenticated attackers can achieve remote code execution by uploading a PHP file with valid image magic bytes to the photo upload endpoint.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-77929?
CVE-2026-77929 is a high-severity vulnerability in MacWarrior clipbucket-v5, published on 18 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-434
Which versions are affected by CVE-2026-77929?
How do I fix CVE-2026-77929?
No fix has been published for CVE-2026-77929 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-77929 being exploited?
There is no known exploitation of CVE-2026-77929 in the wild and no public exploit code.
Sources
Also known as GHSA-g885-94pf-hc9v.