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.
{
"cna_assigner": "VulnCheck",
"cwe_ids": [
"CWE-434"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77929.json"
}{
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "5.5.3-#182"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"original_tag": "5.5.3-#182",
"range": [
{
"fixed": "61cce55ab26ef88fb782dfde47b44c17c56978cd"
}
],
"source": "REFERENCES_TAG"
},
{
"range": [
{
"fixed": "61cce55ab26ef88fb782dfde47b44c17c56978cd"
}
],
"source": "REFERENCES_COMMIT"
}
]
}