In PHP 8.3.* before 8.3.5, function mb_encode_mimeheader() runs endlessly for some inputs that contain long strings of non-space characters followed by a space. This could lead to a potential DoS attack if a hostile user sends data to an application that uses this function.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Php | Php | 8.3.0 (including) | 8.3.5 (excluding) |
| Php8.3 | Ubuntu | devel | * |
| Php8.3 | Ubuntu | noble | * |
| Php8.3 | Ubuntu | upstream | * |