CVE-2026-15330 in CowAgent
Summary
by MITRE • 07/10/2026
A vulnerability was determined in zhayujie CowAgent up to 2.1.1. Impacted is the function _build_image_content/_download_to_data_url of the file agent/tools/vision/vision.py of the component Vision Tool. Executing a manipulation of the argument image can lead to server-side request forgery. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized. Upgrading to version 2.1.2 is recommended to address this issue. This patch is called e85290cddcbb5ffc9c235927f4c92e5b4c3ec264. Upgrading the affected component is advised.
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Analysis
by VulDB Data Team • 07/10/2026
This vulnerability exists within the zhayujie CowAgent software version 2.1.1 and earlier, specifically within the Vision Tool component's image processing functionality. The flaw resides in the _build_image_content and _download_to_data_url functions located in the agent/tools/vision/vision.py file, creating a potential server-side request forgery vulnerability that can be exploited remotely. The security issue stems from insufficient validation of image argument inputs, allowing malicious actors to manipulate the function parameters to initiate unauthorized requests to arbitrary servers.
The technical implementation of this vulnerability enables attackers to construct malicious image arguments that bypass normal input sanitization checks, thereby permitting the application to make unintended network connections to external endpoints specified by the attacker. This type of flaw falls under the Common Weakness Enumeration category CWE-918, which specifically addresses server-side request forgery vulnerabilities where applications fail to properly validate and sanitize user-supplied URLs or resource identifiers. The vulnerability's remote exploitability means that attackers can leverage this weakness without requiring physical access to the system, making it particularly dangerous for network-connected applications.
The operational impact of this vulnerability extends beyond simple data exfiltration as it provides attackers with potential access to internal network resources that the CowAgent server might be able to reach. This could enable reconnaissance activities, data theft, or even lateral movement within the network infrastructure. The fact that a public exploit has been disclosed increases the risk profile significantly, as malicious actors can immediately utilize this knowledge without requiring advanced research or development time. Attackers could potentially use this vulnerability to access internal systems, perform further reconnaissance, or establish persistence mechanisms within the target environment.
The recommended remediation involves upgrading to version 2.1.2 of the CowAgent software, which includes a specific patch identified by the commit hash e85290cddcbb5ffc9c235927f4c92e5b4c3ec264. This patch addresses the input validation weakness in the image processing functions by implementing proper sanitization of user-supplied image arguments before they are processed or used to initiate network requests. Organizations should prioritize this upgrade as a critical security measure, ensuring that all instances of the affected software are updated to prevent exploitation. Additionally, network administrators should implement monitoring for suspicious outbound network connections that might indicate exploitation attempts and consider implementing web application firewalls to provide additional layers of protection against similar vulnerabilities in other components of the system.