CVE-2026-29058 in AVideo-Encoder
Summary
by MITRE • 03/06/2026
AVideo is a video-sharing Platform software. Prior to version 7.0, an unauthenticated attacker can execute arbitrary OS commands on the server by injecting shell command substitution into the base64Url GET parameter. This can lead to full server compromise, data exfiltration (e.g., configuration secrets, internal keys, credentials), and service disruption. This issue has been patched in version 7.0.
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Analysis
by VulDB Data Team • 03/12/2026
The vulnerability identified as CVE-2026-29058 affects AVideo, a popular video-sharing platform software that has been widely adopted for hosting and managing multimedia content. This critical security flaw exists in versions prior to 7.0 and represents a severe command injection vulnerability that allows unauthenticated attackers to execute arbitrary operating system commands on the affected server. The vulnerability stems from improper input validation and sanitization within the application's handling of the base64Url GET parameter, creating a pathway for remote code execution that can result in complete system compromise.
The technical implementation of this vulnerability involves a classic command injection flaw where the base64Url parameter is not properly sanitized before being processed by the application. When an attacker submits malicious input through this parameter, the application fails to properly escape or validate the input, allowing shell command substitution to occur. This type of vulnerability maps directly to CWE-77 which specifically addresses command injection flaws in software applications. The attack vector is particularly dangerous because it does not require authentication, making it accessible to any remote attacker who can interact with the web application's interface.
The operational impact of this vulnerability is extensive and potentially devastating for organizations using affected AVideo versions. Successful exploitation can lead to complete server compromise where attackers gain full administrative control over the hosting environment. This includes the ability to execute arbitrary commands, access sensitive system files, extract configuration secrets, internal cryptographic keys, and user credentials stored on the server. Additionally, the vulnerability can be leveraged to disrupt services by modifying application behavior, deleting files, or installing backdoors. The lack of authentication requirements makes this vulnerability particularly dangerous as it can be exploited without prior access credentials, potentially allowing attackers to maintain persistent access to compromised systems.
Organizations utilizing AVideo software should immediately implement mitigation strategies to protect their systems from this vulnerability. The primary and most effective mitigation is to upgrade to version 7.0 or later, which includes proper input validation and sanitization mechanisms that prevent command injection attacks. In addition to upgrading, organizations should implement network-level protections such as web application firewalls that can detect and block malicious base64Url parameter inputs. Security monitoring should be enhanced to detect unusual command execution patterns and unauthorized access attempts. System administrators should also conduct thorough security audits to ensure no unauthorized modifications have occurred and implement principle of least privilege configurations to limit the impact if compromise occurs. This vulnerability aligns with ATT&CK technique T1059 which describes executing malicious code through command and scripting interpreter, making it particularly relevant for security teams implementing defensive measures against such attack patterns.