CVE-2026-48444: CAI Content Credentials DoS Vulnerability

CVE-2026-48444 Overview

CVE-2026-48444 affects Adobe's CAI (Content Authenticity Initiative) Content Credentials SDK. The vulnerability is an integer overflow or wraparound flaw [CWE-190] that can crash the application, producing a denial-of-service condition. Exploitation requires local access but no privileges and no user interaction. The flaw affects availability only; confidentiality and integrity remain unaffected.

Critical Impact
An attacker with local access can trigger an integer overflow in CAI Content Credentials to crash the application, resulting in denial-of-service without any user interaction.

Affected Products

Adobe CAI Content Credentials SDK (see Adobe Security Advisory APSB26-111 for affected versions)
Applications and integrations embedding the Content Credentials SDK
Downstream tooling processing C2PA (Coalition for Content Provenance and Authenticity) manifests via the SDK

Discovery Timeline

2026-08-11 - CVE-2026-48444 published to NVD
2026-08-12 - Last updated in NVD database

Technical Details for CVE-2026-48444

Vulnerability Analysis

The vulnerability resides in Adobe's CAI Content Credentials SDK, which parses and validates C2PA content provenance manifests attached to media files. An integer overflow condition [CWE-190] occurs when the SDK processes crafted input with size or length values that exceed the storage capacity of the integer variable used to represent them.

When the overflow wraps to a small or negative value, subsequent memory allocation, buffer indexing, or loop termination operations behave incorrectly. This results in an unhandled fault that terminates the process. The vulnerability affects availability of applications that integrate the SDK for verifying media authenticity.

The attack requires only local access. No authentication and no user interaction are needed to trigger the crash. See the Adobe Security Advisory APSB26-111 for authoritative technical details.

Root Cause

The root cause is inadequate validation of arithmetic operations on untrusted size or length fields within manifest parsing routines. When a computed value exceeds the maximum representable integer, the value wraps around. Subsequent code paths operate on the wrapped value as if it were valid, leading to a fatal condition.

Attack Vector

An attacker delivers a specially crafted file containing malformed content credential structures to the local system. When the SDK processes the file, the overflow triggers and the host application crashes. No prior authentication is required, and the victim does not need to interact with a prompt or dialog beyond ordinary file handling.

No public proof-of-concept exploit code is available for CVE-2026-48444 at the time of publication. The vulnerability is described in prose here because no verified exploit samples exist in public repositories.

Detection Methods for CVE-2026-48444

Indicators of Compromise

Repeated crashes or abnormal terminations of applications that embed the CAI Content Credentials SDK
Windows Error Reporting or macOS crash logs referencing SDK modules with integer overflow or access violation exceptions
Local files with malformed C2PA manifests appearing in user download or temporary directories prior to crashes

Detection Strategies

Monitor process termination events tied to applications integrating the Content Credentials SDK and correlate with recent file access
Inspect crash dumps for arithmetic overflow signatures within SDK parsing functions
Alert on repeated process restart cycles for the same application within short time windows on a single endpoint

Monitoring Recommendations

Collect endpoint telemetry for application crash events and forward to a centralized log platform for correlation
Track file provenance for media files processed by CAI-enabled applications, including source and delivery path
Baseline normal SDK process behavior to identify anomalous termination patterns across the fleet

How to Mitigate CVE-2026-48444

Immediate Actions Required

Apply the updates listed in Adobe Security Advisory APSB26-111 to all systems running the CAI Content Credentials SDK
Inventory applications that embed the SDK and prioritize patching for systems handling untrusted media files
Restrict local file delivery paths so untrusted media cannot reach SDK-enabled workstations without inspection

Patch Information

Adobe published fixed versions in advisory APSB26-111. Administrators should consult the Adobe Security Advisory APSB26-111 for exact fixed version numbers and download locations, then update all affected installations.

Workarounds

Limit processing of untrusted files by CAI-enabled applications until the patch is deployed
Enforce least-privilege execution for applications that consume Content Credentials to reduce impact of crashes
Use application allowlisting to prevent execution of untrusted binaries that could deliver malformed manifests to the SDK

bash

# Example: verify installed Adobe Content Authenticity SDK version on Linux
# Replace the path with the location used by your integration
find / -name "c2pa*" -type f 2>/dev/null -exec sha256sum {} \;