Server-side Request Forgery (SSRF) Affecting studio-42/elfinder package, versions <2.1.70
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PHP-STUDIO42ELFINDER-20186961
- published28 Sept 2026
- disclosed31 Aug 2026
- creditUnknown
Introduced: 31 Aug 2026
CVE-2026-81889 (opens in a new tab)How to fix?
Upgrade studio-42/elfinder to version 2.1.70 or higher.
Overview
studio-42/elfinder is an open-source file manager for web, written in JavaScript using jQuery UI.
Affected versions of this package are vulnerable to Server-side Request Forgery (SSRF) in the fsock_get_contents process when PHP cURL is unavailable and URL uploads are used. An attacker can access internal network resources and retrieve sensitive information by submitting a specially crafted URL that exploits DNS rebinding to bypass IP validation. This is only exploitable if the PHP environment lacks the cURL extension, the attacker has access to the URL upload functionality, the server can connect to internal targets, and DNS responses can be manipulated to provide different IPs for repeated resolutions.
Workaround
This vulnerability can be mitigated by disabling URL uploads when cURL is unavailable or by configuring urlUploadFilter to reject URL uploads.