CVE-2026-57993 in Edge
Summary
by MITRE • 07/04/2026
Server-side request forgery (ssrf) in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.
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Analysis
by VulDB Data Team • 07/04/2026
Server-side request forgery vulnerabilities in Microsoft Edge Chromium-based browsers represent a critical security weakness that enables attackers to manipulate the browser's handling of network requests from the server side. This vulnerability stems from insufficient validation of user-supplied input when processing web requests, allowing malicious actors to redirect or manipulate requests intended for internal systems or services. The flaw exists within the browser's network stack implementation where it fails to properly sanitize and validate URLs or request parameters before forwarding them to backend servers.
The technical execution of such attacks typically involves crafting malicious web content that triggers the browser to make unintended network requests to internal resources or external attacker-controlled endpoints. When Microsoft Edge processes these requests, it may bypass normal security restrictions and access resources that should be restricted to authorized users only. This behavior creates a pathway for attackers to perform reconnaissance activities, access internal systems, or even escalate their privileges within the target environment. The vulnerability is particularly dangerous because it operates at the browser level and can leverage legitimate browser functionality against the organization's own infrastructure.
From an operational impact perspective, this SSRF vulnerability enables attackers to bypass traditional network security controls such as firewalls and proxies that rely on source IP addresses or domain names for access control decisions. Attackers can use this weakness to probe internal networks, scan for open ports, or even exfiltrate sensitive data from internal systems that are normally protected by network segmentation. The implications extend beyond simple information disclosure as the vulnerability can be chained with other exploits to achieve more severe outcomes including privilege escalation or lateral movement within the compromised environment.
The attack surface is significantly expanded when considering that Microsoft Edge Chromium-based browsers are widely deployed across enterprise environments where they handle sensitive corporate data and access critical internal services. This makes the vulnerability particularly attractive to threat actors seeking to gain unauthorized access to organizational resources. The issue aligns with CWE-918, which specifically addresses server-side request forgery vulnerabilities in web applications and browser implementations. Organizations should implement mitigations including strict input validation of all network requests, implementing network segmentation policies that limit access to internal systems, and deploying web application firewalls that can detect and block suspicious SSRF patterns.
Security professionals should monitor for signs of exploitation attempts through network traffic analysis, looking for unusual outbound connections or requests to unexpected destinations. The vulnerability also relates to ATT&CK technique T1071.004 which covers application layer protocol: DNS, where attackers may use SSRF to bypass DNS-based security controls and access internal resources directly. Organizations should consider deploying network monitoring solutions that can detect anomalous request patterns, implement strict egress filtering policies, and regularly update browser versions to ensure they contain the latest security patches addressing known SSRF vulnerabilities in the Chromium engine.