CVE-2026-4016 in GPAC
Summary
by MITRE • 03/12/2026
A security vulnerability has been detected in GPAC 26.03-DEV. Affected by this vulnerability is the function svgin_process of the file src/filters/load_svg.c of the component SVG Parser. The manipulation leads to out-of-bounds write. Local access is required to approach this attack. The exploit has been disclosed publicly and may be used. The identifier of the patch is 7618d7206cdeb3c28961dc97ab0ecabaff0c8af2. It is suggested to install a patch to address this issue.
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Analysis
by VulDB Data Team • 03/17/2026
The vulnerability identified as CVE-2026-4016 represents a critical out-of-bounds write flaw within the GPAC multimedia framework version 26.03-DEV, specifically within the SVG Parser component. This security weakness manifests in the svgin_process function located in the src/filters/load_svg.c source file, where improper input validation allows for memory corruption during SVG file processing. The vulnerability requires local access for exploitation, meaning an attacker must already have system-level privileges or physical access to the target machine to leverage this flaw effectively. The out-of-bounds write condition occurs when the parser fails to properly validate the dimensions or structure of SVG elements, potentially allowing an attacker to write data beyond the allocated memory boundaries. This type of vulnerability falls under CWE-787, which specifically addresses out-of-bounds write conditions that can lead to arbitrary code execution or system instability. The disclosed exploit demonstrates that attackers can manipulate SVG files to trigger this memory corruption, potentially enabling privilege escalation or denial of service attacks.
The operational impact of this vulnerability extends beyond simple memory corruption as it affects the core functionality of GPAC's SVG processing capabilities, which are commonly used in multimedia applications, web browsers, and digital media players that rely on the framework for content rendering. When exploited, the out-of-bounds write can cause the application to crash, leading to denial of service, or potentially allow an attacker to execute malicious code with the privileges of the running process. The vulnerability's presence in the SVG parser component makes it particularly dangerous in environments where SVG files are frequently processed, such as web applications, digital signage systems, or multimedia content management platforms. Security researchers have noted that this flaw aligns with ATT&CK technique T1059.007, which involves the use of scripting languages, as the vulnerability could be exploited through malicious SVG content that triggers the flawed parsing logic. The local access requirement does not diminish the threat level, as it can be combined with other attack vectors such as social engineering or compromised user accounts to achieve broader system compromise.
The patch addressing this vulnerability, identified by the commit hash 7618d7206cdeb3c28961dc97ab0ecabaff0c8af2, implements proper bounds checking and input validation within the svgin_process function to prevent memory corruption. System administrators and security teams should prioritize applying this patch immediately, especially in environments where SVG content processing is common or where the framework is used in security-sensitive applications. Organizations should also implement additional security measures such as restricting SVG file uploads, implementing content validation, and monitoring for suspicious file processing activities. The vulnerability highlights the importance of proper memory management in multimedia processing libraries and serves as a reminder of the critical need for thorough input validation in parsing functions. Regular security updates and vulnerability assessments should be conducted to ensure that all multimedia frameworks and libraries remain protected against similar out-of-bounds write conditions. Given the public disclosure of the exploit, organizations should also consider implementing network segmentation and access controls to limit potential attack surfaces, while monitoring for any indicators of compromise related to SVG processing activities.