CVE-2026-116282 in Kameleo
Summary
by MITRE • 10/26/2026
A security flaw has been discovered in Kameleo up to 5.3.1. Affected by this issue is the function CookieController.ListCookies of the file client-engine-application/w.cs of the component Cookie Controller. The manipulation of the argument guid results in information disclosure. The attack can be executed remotely. The vendor was contacted early about this disclosure but did not respond in any way.
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Analysis
by VulDB Data Team • 10/26/2026
The vulnerability identified within Kameleo versions up to 5.3.1 represents a critical security deficiency located specifically within the CookieController component, more precisely in the ListCookies function found in the client-engine-application/w.cs file. This flaw is categorized as an improper access control issue where the application fails to adequately restrict direct object references or validate user-supplied input before processing it. The core technical mechanism involves the manipulation of the guid argument passed to this function. In a properly secured system, such identifiers should be validated against authorized sessions and permissions to ensure that only legitimate users can retrieve cookie data associated with their specific context. However, in this instance, the lack of rigorous validation allows an attacker to craft requests containing arbitrary or manipulated guids, thereby bypassing intended access restrictions.
This technical flaw leads directly to a significant information disclosure vulnerability. By exploiting the ability to manipulate the guid parameter, an unauthorized actor can retrieve sensitive cookie data that they should not have access to. Cookies often contain session tokens, authentication credentials, and other personally identifiable information or proprietary application state data. The exposure of this data compromises the confidentiality integrity of the system's user sessions and potentially allows for further exploitation such as session hijacking or privilege escalation if the disclosed cookies provide elevated access rights. The severity is compounded by the fact that this attack vector can be executed remotely, meaning an attacker does not need local access to the target machine but can instead leverage network connectivity to send maliciously crafted requests over HTTP or HTTPS protocols.
From a threat intelligence perspective, this vulnerability aligns with CWE-284 Improper Access Control and specifically relates to CWE-613 Insufficient Session Expiration when considering the potential for session reuse based on disclosed tokens. In terms of MITRE ATT&CK mapping, this behavior is consistent with T1539 Steal Web Session Cookie, where adversaries aim to capture cookies from a victim's browser or application memory to impersonate that user. The remote nature of the exploit places it within the initial access and persistence tactics commonly seen in web-based attacks against desktop applications with network components like Kameleo.
The operational impact of this vulnerability is substantial for users relying on Kameleo for automated browsing tasks, particularly those handling sensitive data or operating in high-security environments. The disclosure of cookie information can lead to unauthorized account takeovers, loss of privacy, and potential financial damage depending on the nature of the accounts being accessed through these cookies. Furthermore, the vendor's lack of response despite early notification raises concerns about the overall security posture and incident response capabilities associated with this software product. Users are currently left without an official patch or mitigation strategy from the developer, increasing their exposure to exploitation by malicious actors who may actively scan for such unpatched vulnerabilities in widely used automation tools.
To mitigate these risks until a vendor-supplied fix is available, users should consider implementing network-level controls if possible, such as restricting access to the application's local services via firewall rules or host-based security policies that limit incoming connections to trusted sources only. Additionally, running the application with minimal privileges can help contain potential damage in case of exploitation. It is also advisable for organizations using Kameleo to monitor their internal networks and endpoint detection systems for unusual outbound traffic patterns or attempts to access local service endpoints associated with the cookie controller component. Regular audits of session management practices within any custom integrations involving this tool are recommended to ensure that sensitive data is not inadvertently exposed through other vectors while waiting for a resolution from the vendor.