CVE-2026-34657 in CAI Content Credentials
Summary
by MITRE • 06/10/2026
CAI Content Credentials versions [email protected], c2pa-v0.80.1 and earlier are affected by an Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability that could result in an arbitrary file system write. An attacker could leverage this vulnerability to write to unauthorized files or directories outside of intended restrictions. Exploitation of this issue requires user interaction in that a victim must extract a maliciously crafted file.
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Analysis
by VulDB Data Team • 08/29/2026
The CAI Content Credentials library versions [email protected] and c2pa-v0.80.1 and earlier contain a critical path traversal vulnerability that fundamentally undermines the security boundaries of file system operations. This flaw resides in the improper limitation of pathname resolution within the library's file handling mechanisms, creating a direct pathway for unauthorized file system modifications. The vulnerability manifests when the library processes user-supplied file paths without adequate validation or sanitization, allowing attackers to manipulate directory traversal sequences that bypass intended access controls. This weakness directly maps to CWE-22, which specifically addresses improper limitation of pathname to restricted directory vulnerabilities, and represents a classic example of how insufficient input validation can lead to arbitrary code execution through file system manipulation. The security implications extend beyond simple file access, as this vulnerability can be leveraged to overwrite critical system files or inject malicious content into unauthorized locations.
The operational impact of this vulnerability becomes significant when considering the attack vector and exploitation requirements. While the vulnerability requires user interaction through the extraction of a maliciously crafted file, this presents a realistic threat scenario in environments where users process untrusted content. The attack surface expands when considering that many content credential processing workflows involve automated or semi-automated file handling, making the vulnerability particularly dangerous in enterprise or content management contexts. When an attacker successfully exploits this weakness, they can achieve arbitrary file system writes, potentially allowing them to modify configuration files, inject backdoors, or overwrite legitimate software components. This capability aligns with ATT&CK technique T1059.007 for command and scripting interpreter, as the malicious file writes could enable persistence mechanisms or payload delivery. The vulnerability's exploitation requires careful crafting of file paths that include directory traversal sequences such as '../' or '..\\', which the library fails to properly sanitize or reject during the file processing workflow.
Mitigation strategies for this vulnerability must address both the immediate code-level fixes and broader operational security considerations. The primary remediation involves implementing strict input validation and path normalization mechanisms that prevent directory traversal sequences from being processed as legitimate file paths. This includes canonicalizing file paths, enforcing strict directory restrictions, and implementing whitelist-based validation for all file operations. Organizations should also consider implementing principle of least privilege access controls for the libraries and applications that utilize CAI Content Credentials, limiting the file system permissions of processes that handle content credential files. The vulnerability's impact is amplified in environments where automated content processing occurs, making it essential to implement additional layers of security such as sandboxing or containerization for file processing workflows. Security teams should also establish monitoring procedures to detect unauthorized file system modifications that could indicate successful exploitation attempts. The remediation process should include comprehensive testing of file path handling logic and validation of all user-supplied inputs to ensure that directory traversal sequences are properly rejected or neutralized before any file system operations occur. This vulnerability serves as a reminder of the critical importance of secure file handling practices and the potential for seemingly simple path traversal flaws to create significant security breaches when combined with user interaction requirements.