CVE-2026-48387 Overview
CVE-2026-48387 is an integer overflow or wraparound vulnerability [CWE-190] affecting Adobe's CAI Content Credentials SDK. An attacker with local access can trigger the overflow to crash the application, producing a denial-of-service condition. Exploitation does not require user interaction or authentication.
Adobe published the advisory as APSB26-111. The issue impacts availability only, without compromising confidentiality or integrity of processed content.
Critical Impact
Local attackers can crash applications built on the CAI Content Credentials SDK, disrupting content authenticity verification workflows without any user interaction.
Affected Products
- Adobe CAI Content Credentials SDK (versions listed in Adobe advisory APSB26-111)
- Applications integrating the affected Content Authenticity SDK
- Downstream services performing Content Credentials validation
Discovery Timeline
- 2026-08-11 - CVE-2026-48387 published to NVD
- 2026-08-12 - Last updated in NVD database
Technical Details for CVE-2026-48387
Vulnerability Analysis
The vulnerability originates in arithmetic operations performed by the CAI Content Credentials SDK when parsing or processing content manifest data. An integer overflow occurs when a computed value exceeds the maximum size of its integer type and wraps around to an unexpected value.
This wraparound leads to inconsistent state or invalid memory sizing that terminates the process. The result is an availability impact on the host application. No memory content is disclosed and no attacker-controlled code executes as a direct consequence.
Exploitation requires local access to the target system. The attacker supplies a crafted input, typically a malformed asset containing Content Credentials metadata, to a vulnerable process.
Root Cause
The root cause is improper handling of arithmetic bounds within SDK routines that compute buffer sizes, counts, or offsets. When those computations overflow, the SDK proceeds with corrupted values and reaches an unrecoverable error path. This maps to [CWE-190] Integer Overflow or Wraparound.
Attack Vector
An attacker delivers a specially crafted file or input to an application that invokes the CAI Content Credentials SDK. Processing the input triggers the overflow and forces the application to terminate. The scope is unchanged and the impact is limited to availability of the affected process. Refer to the Adobe Security Update APSB26-111 for technical details on affected components.
Detection Methods for CVE-2026-48387
Indicators of Compromise
- Repeated application crashes or unexpected process termination in software that invokes the CAI Content Credentials SDK.
- Crash dumps referencing SDK modules responsible for manifest parsing or metadata decoding.
- Malformed Content Credentials assets appearing in ingestion pipelines shortly before crashes.
Detection Strategies
- Monitor system event logs for abnormal termination of processes that load Content Authenticity SDK libraries.
- Correlate crash telemetry with file-processing activity to identify inputs that consistently trigger faults.
- Inspect files failing SDK validation for structural anomalies in size fields or embedded counts.
Monitoring Recommendations
- Track process exit codes and Windows Error Reporting or Linux core dumps for SDK-linked binaries.
- Alert on high-frequency processing failures from a single source path or user account.
- Log SDK version data across endpoints to identify unpatched deployments.
How to Mitigate CVE-2026-48387
Immediate Actions Required
- Apply the fixed SDK version referenced in Adobe advisory APSB26-111 to all affected applications.
- Inventory endpoints and build pipelines that link against the CAI Content Credentials SDK.
- Restrict local access to systems that process untrusted Content Credentials assets.
Patch Information
Adobe released updated SDK versions addressing the overflow. Consult the Adobe Security Update APSB26-111 for the current fixed versions and download locations. Rebuild dependent applications against the patched SDK and redistribute updated binaries.
Workarounds
- Validate and sanitize files before submitting them to the SDK, rejecting inputs with anomalous size or count fields.
- Isolate SDK processing in a sandboxed or containerized worker that can be restarted without affecting the parent service.
- Limit which users can submit content for Content Credentials validation on shared systems.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
