{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata — refreshed continuously.","feed_url":"https://feed.craftedsignal.io/products/django-s3file--7.0.1/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cves":[],"_cs_exploited":false,"_cs_products":["django-s3file (\u003c= 7.0.1)"],"_cs_severities":["critical"],"_cs_tags":["path-traversal","web-application","django"],"_cs_type":"advisory","_cs_vendors":[],"content_html":"\u003cp\u003eThe django-s3file package, specifically versions 7.0.1 and earlier, contains a critical vulnerability related to relative path traversal in the \u003ccode\u003eS3FileMiddleware\u003c/code\u003e component. This flaw allows a malicious actor to craft a specific HTTP request to circumvent the intended pre-signed upload locations within an application using the django-s3file package. By manipulating the request path, the attacker can trick the Django application into loading files from arbitrary locations into \u003ccode\u003erequest.FILES\u003c/code\u003e. This issue was reported on May 5, 2026, and it poses a significant risk to confidentiality and integrity because of the potential for unauthorized file access and modification. Defenders should prioritize patching to version 7.0.2 or later to mitigate this risk.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAn attacker identifies a Django application using a vulnerable version of django-s3file (\u0026lt;= 7.0.1).\u003c/li\u003e\n\u003cli\u003eThe attacker analyzes the application\u0026rsquo;s file upload functionality that relies on pre-signed S3 URLs generated by \u003ccode\u003eS3FileMiddleware\u003c/code\u003e.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a malicious HTTP request containing a relative path (e.g., \u0026ldquo;../../\u0026rdquo;, \u0026ldquo;../\u0026rdquo;) within the file upload path or filename.\u003c/li\u003e\n\u003cli\u003eThis manipulated request is sent to the Django application during the file upload process.\u003c/li\u003e\n\u003cli\u003eThe \u003ccode\u003eS3FileMiddleware\u003c/code\u003e improperly processes the relative path, allowing the request to escape the intended pre-signed upload location.\u003c/li\u003e\n\u003cli\u003eThe Django application retrieves a file from an unintended location in the S3 bucket based on the attacker\u0026rsquo;s manipulated path.\u003c/li\u003e\n\u003cli\u003eThe application loads the content of this file into \u003ccode\u003erequest.FILES\u003c/code\u003e, making it accessible to the application logic.\u003c/li\u003e\n\u003cli\u003eDepending on subsequent handling of \u003ccode\u003erequest.FILES\u003c/code\u003e, the attacker can potentially achieve unauthorized file access, modification, or even remote code execution if the uploaded file is processed unsafely.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of this vulnerability allows attackers to bypass intended security controls on file uploads. The primary impact is unauthorized access to files within the S3 bucket associated with the Django application. Depending on the application\u0026rsquo;s functionality and file handling procedures, an attacker could potentially modify existing files, upload malicious files, or even gain remote code execution by uploading and processing malicious files. Given the severity level of \u0026ldquo;critical\u0026rdquo;, organizations using affected versions should prioritize patching to prevent potential data breaches or system compromise.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eUpgrade the django-s3file package to version 7.0.2 or later to remediate the path traversal vulnerability described in CVE-2026-42196.\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rule \u0026ldquo;Detect Django S3File Path Traversal Attempt\u0026rdquo; to monitor for suspicious HTTP requests containing relative paths in file upload URLs.\u003c/li\u003e\n\u003cli\u003eImplement robust input validation and sanitization measures on all file uploads to prevent path traversal attacks, regardless of the middleware in use.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-05-05T20:05:49Z","date_published":"2026-05-05T20:05:49Z","id":"/briefs/2024-01-django-s3file-path-traversal/","summary":"The django-s3file package is vulnerable to relative path traversal attacks via the S3FileMiddleware component, allowing attackers to bypass pre-signed upload locations and potentially leading to unauthorized file access and modification.","title":"django-s3file Vulnerable to Relative Path Traversal","url":"https://feed.craftedsignal.io/briefs/2024-01-django-s3file-path-traversal/"}],"language":"en","title":"CraftedSignal Threat Feed — Django-S3file (\u003c= 7.0.1)","version":"https://jsonfeed.org/version/1.1"}