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CVE-2020-26259 is an unsafe deserialization vulnerability in XStream versions before 1.4.15. When XStream unmarshals an attacker-controlled XML input stream while relying on its default Security Framework blacklist, crafted object data can invoke functionality that deletes a locally accessible, attacker-known file. The deletion is performed with the operating-system privileges of the process running XStream.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (1 hidden).
This repository is a proof-of-concept exploit for CVE-2020-26259, a deserialization vulnerability in the XStream Java library (version 1.4.14). The structure includes a Maven project with a single Java entry point (Main.java) that deserializes a crafted XML file (CVE-2020-26259.xml) using XStream. The XML payload is designed to exploit the vulnerability by instantiating internal Java classes to read the contents of a file named 'target.txt' on the local filesystem. The exploit demonstrates how an attacker could leverage unsafe deserialization to access arbitrary files. No network endpoints are involved; the attack vector is local file access via malicious XML input. The repository is organized as a typical Java Maven project, with supporting IDE configuration files and a minimal README.
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XStream arbitrary local-file deletion vulnerability during unmarshalling.
An XStream vulnerability enabling arbitrary local-file deletion during unmarshalling.
An XStream unmarshalling vulnerability that permits arbitrary local file deletion.
An XStream unmarshalling vulnerability that permits arbitrary deletion of files on the local host.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
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