CVE-2026-100114 in C2PA Tool
Summary
by MITRE • 10/15/2026
CAI Content Credentials is affected by an Improper Access Control vulnerability that could result in a Security feature bypass. An attacker could leverage this vulnerability to bypass security measures and gain unauthorized write access. Exploitation of this issue does not require user interaction.
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Analysis
by VulDB Data Team • 10/15/2026
The CAI Content Credentials system, which serves as the foundational infrastructure for authenticating digital media provenance through C2PA standards, is susceptible to an Improper Access Control vulnerability designated under CWE-269. This flaw represents a critical failure in the enforcement of security policies regarding who or what can access specific resources within the application logic. Specifically, the architectural design fails to adequately restrict write operations on sensitive data structures that store credential metadata and signature chains. By exploiting this weakness, an attacker can manipulate the integrity records associated with digital content without possessing valid authentication credentials or administrative privileges. This bypass of security features undermines the core trust model upon which Content Credentials rely, allowing for the unauthorized modification of provenance information.
From a technical perspective, the vulnerability stems from insufficient validation checks on input parameters that trigger write operations within the credential storage mechanism. The system likely processes requests to update metadata without verifying whether the requesting entity holds the necessary permissions or cryptographic keys required for such modifications. This lack of strict authorization enforcement allows an external actor to inject false provenance data directly into the content credentials file. Since the exploitation does not require user interaction, the attack vector is fully remote and automated. An attacker can send crafted network requests that exploit this logic error, effectively writing malicious or misleading metadata to files associated with legitimate digital assets. This capability enables the creation of deepfakes or manipulated media while maintaining a facade of authenticity through valid-looking but tampered credentials.
The operational impact of this vulnerability is severe as it directly compromises the integrity and trustworthiness of digital content verification systems. Content Credentials are designed to provide end-users, journalists, and legal entities with verifiable proof of origin and editing history. When an attacker can bypass access controls to alter these records, they can falsely attribute authorship, hide evidence of manipulation, or insert disinformation into the provenance chain. This erosion of trust affects downstream applications that rely on this data for automated decision-making, such as content moderation platforms, news aggregation services, and legal evidentiary tools. The ability to silently modify credentials without detection means that compromised files may appear authentic during standard verification processes if the underlying cryptographic signatures are not strictly bound to immutable state checks or if the validation logic itself is also flawed in its handling of these unauthorized writes.
Mitigation strategies must focus on implementing robust access control mechanisms aligned with industry best practices for secure software development. Immediate remediation should involve enforcing strict role-based access control (RBAC) policies that validate user permissions before allowing any write operations to credential storage areas. Developers must integrate comprehensive input validation and authorization checks at the API layer, ensuring that only authenticated entities with explicit rights can modify provenance data. Additionally, implementing immutable logging of all metadata changes and utilizing cryptographic binding techniques where signatures cover not just content but also access control states can help detect unauthorized modifications. Regular security audits focusing on CWE-269 patterns and adherence to ATT&CK tactics related to privilege escalation or defense evasion are recommended to identify similar weaknesses in the broader application architecture before they can be leveraged by malicious actors.