Overview
The CVE-2025-26278 represents a serious security vulnerability in the lib.set function of dref v0.1.2, which could lead to a potential system compromise or data leakage. This vulnerability has a CVSS severity score of 7.5 and is caused by prototype pollution. This issue affects all systems and applications that use the vulnerable version of this popular JavaScript utility library, making it a significant security concern for developers and users alike.
Vulnerability Summary
CVE ID: CVE-2025-26278
Severity: High (7.5 CVSS score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise and potential data leakage
Affected Products
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Product | Affected Versions
dref library | v0.1.2
How the Exploit Works
The exploit works by an attacker supplying a crafted payload that pollutes the prototype of an object, which can lead to the addition or modification of an object property. This can cause unexpected behaviors in applications that rely on the affected library, leading to a Denial of Service (DoS) condition, or worse, a potential system compromise or data leakage.
Conceptual Example Code
Below is a conceptual example of how an attacker could exploit this vulnerability:
// Example of a malicious payload
var payload = JSON.parse('{"__proto__": {"polluted": "Prototype Polluted"}}');
// Applying the payload to the vulnerable function
lib.set(targetObj, 'irrelevant', payload);
// Now, any object created will have the "polluted" property
var newObj = {};
console.log(newObj.polluted); // Outputs: "Prototype Polluted"In a real-world scenario, the payload would be more sophisticated and tailored to cause maximum disruption or to leverage the prototype pollution in a way that would lead to a system compromise or data leakage.
Remediation
The best remediation for this vulnerability is to apply the vendor-supplied patch. If the patch is not available or cannot be immediately applied, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation measure. However, these should not be seen as long-term solutions, as they do not address the underlying vulnerability.