CVE-2026-71442 in C2PA Tool
Summary
by MITRE • 08/25/2026
CAI Content Credentials is affected by an Integer Underflow (Wrap or Wraparound) vulnerability that could result in an application denial-of-service. An attacker could exploit this vulnerability to crash the application, leading to a denial-of-service condition. Exploitation of this issue does not require user interaction.
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Analysis
by VulDB Data Team • 08/25/2026
The CAI Content Credentials software is susceptible to an integer underflow vulnerability, specifically categorized as CWE-191: Integer Underflow (Wrap or Wraparound). This type of flaw occurs when a variable that holds an unsigned value is decremented below zero, causing it to wrap around to the maximum possible value for its data type. In the context of CAI Content Credentials, which handles metadata and provenance information for digital content, such arithmetic errors can lead to significant instability within the application logic. The vulnerability arises from improper handling of numeric inputs or internal state variables where subtraction operations are performed without adequate bounds checking or validation against minimum thresholds. When an attacker provides crafted input that triggers this underflow condition, the resulting incorrect calculation propagates through the system, leading to memory corruption, invalid pointer dereferences, or logical errors that destabilize the application runtime environment.
The operational impact of exploiting this integer underflow is primarily a denial-of-service scenario. Because the vulnerability does not require user interaction for exploitation, it presents a severe risk in automated processing pipelines where content credentials are validated programmatically. An attacker can send specially crafted data packets or files containing maliciously constructed metadata fields that trigger the arithmetic error during parsing or validation routines. Upon execution of these flawed calculations, the application may crash unexpectedly, terminating its process and rendering it unavailable to legitimate users. This disruption affects the availability component of the CIA triad, preventing authorized entities from accessing critical content provenance data. In environments where CAI Content Credentials is used for continuous monitoring or automated verification workflows, such crashes can cause cascading failures across dependent systems that rely on consistent uptime and reliable metadata processing services.
From a threat modeling perspective, this vulnerability aligns with ATT&CK technique T1499: Endpoint Denial of Service, which involves methods to degrade the availability of compute targets through resource exhaustion or application instability. The lack of required user interaction classifies this as an attack vector that can be leveraged remotely if the service is exposed over a network interface, significantly increasing its exploitability score in vulnerability management frameworks. Security analysts should note that while the immediate impact is denial-of-service, integer underflows often serve as precursors to more severe vulnerabilities such as buffer overflows or arbitrary code execution if memory layout manipulation occurs during the wraparound state. Therefore, treating this issue solely as a stability bug may underestimate its potential for escalation in complex software architectures.
To mitigate this vulnerability, developers must implement rigorous input validation and arithmetic safety checks within the parsing logic of CAI Content Credentials. This includes ensuring that all integer operations are performed using safe libraries or functions that detect overflow and underflow conditions before they occur. Specifically, code should verify that operands meet minimum value requirements prior to subtraction, or use unsigned comparison techniques that account for wraparound behavior. Additionally, implementing comprehensive unit tests with edge cases involving boundary values such as zero, negative numbers (if converted), and maximum integer limits will help identify similar flaws during the development lifecycle. For organizations currently running affected versions, applying vendor-provided patches is essential to restore service reliability. In the interim, deploying network-level controls or input sanitization filters at the perimeter can block malformed requests before they reach the vulnerable application logic, thereby reducing the attack surface and maintaining operational continuity until a permanent fix is deployed.