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EUVD-2026-196201

fkie_cve-2024-24752

Bref enable serverless PHP on AWS Lambda. When Bref is used with the Event-Driven Function runtime and the handler is a `RequestHandlerInterface`, then the Lambda event is converted to a PSR7 object. During the conversion process, if the request is a MultiPart, each part is parsed and for each which contains a file, it is extracted and saved in `/tmp` with a random filename starting with `bref_upload_`. The flow mimics what plain PHP does but it does not delete the temporary files when the request has been processed. An attacker could fill the Lambda instance disk by performing multiple MultiPart requests containing files. This vulnerability is patched in 2.1.13.

GHSA-x4hh-frx8-98r5 — Bref's Uploaded Files Not Deleted in Event-Driven Functions

Affected: Packagist: bref/bref

## Impacted Resources

bref/src/Event/Http/Psr7Bridge.php:94-125

## Description

When Bref is used with the Event-Driven Function runtime and the handler is a `RequestHandlerInterface`, then the Lambda event is converted to a PSR7 object. During the conversion process, if the request is a MultiPart, each part is parsed and for each which contains a file, it is extracted and saved in `/tmp` with a random filename starting with `bref_upload_`.

The function implementing the logic follows:

```php private static function parseBodyAndUploadedFiles(HttpRequestEvent $event): array { $bodyString = $event->getBody(); $files = []; $parsedBody = null; $contentType = $event->getContentType(); if ($contentType !== null && $event->getMethod() === 'POST') { if (str_starts_with($contentType, 'application/x-www-form-urlencoded')) { parse_str($bodyString, $parsedBody); } else { $document = new Part("Content-type: $contentType\r\n\r\n" . $bodyString); if ($document->isMultiPart()) { $parsedBody = []; foreach ($document->getParts() as $part) { if ($part->isFile()) { $tmpPath = tempnam(sys_get_temp_dir(), 'bref_upload_'); if ($tmpPath === false) { throw new RuntimeException('Unable to create a temporary directory'); } file_put_contents($tmpPath, $par…

Most recent entries from all

EUVD-2026-196201

fkie_cve-2024-24752

GHSA-x4hh-frx8-98r5 — Bref's Uploaded Files Not Deleted in Event-Driven Functions

gsd-2024-24752