CVE-2026-48443: CAI Content Credentials DoS Vulnerability

CVE-2026-48443 Overview

CVE-2026-48443 affects Adobe's Content Authenticity Initiative (CAI) Content Credentials SDK. The flaw is an Uncontrolled Resource Consumption weakness [CWE-400] that allows a local attacker to exhaust system resources and trigger an application denial-of-service. Exploitation does not require user interaction or prior authentication on the target application.

An attacker with local access can submit crafted input that forces the SDK to consume excessive CPU or memory. The condition halts availability of the affected process without impacting confidentiality or integrity.

Critical Impact
A local attacker can trigger denial-of-service in applications that embed the Adobe CAI Content Credentials SDK, disrupting content authenticity workflows and any dependent services.

Affected Products

Adobe Content Authenticity SDK (CAI Content Credentials)
Applications embedding vulnerable versions of the CAI Content Credentials library
Refer to the Adobe Security Bulletin APSB26-111 for the definitive list of affected versions

Discovery Timeline

2026-08-11 - CVE-2026-48443 published to NVD
2026-08-12 - Last updated in NVD database

Technical Details for CVE-2026-48443

Vulnerability Analysis

CVE-2026-48443 is a denial-of-service vulnerability in the Adobe CAI Content Credentials SDK. The SDK parses and verifies embedded content credential manifests attached to media assets. The vulnerability class is Uncontrolled Resource Consumption [CWE-400], meaning the library fails to bound the work performed while processing attacker-controlled input.

When a malformed or maliciously crafted asset is supplied to the SDK, parsing routines expand into excessive CPU cycles or memory allocation. The affected process becomes unresponsive or terminates. Availability of the host application is impacted while confidentiality and integrity remain intact, consistent with the reported EPSS probability of 0.214%.

Adobe has not published exploit indicators, and no public proof-of-concept is available at the time of NVD publication. The issue is not listed in the CISA Known Exploited Vulnerabilities catalog.

Root Cause

The root cause is missing enforcement of resource limits during parsing or verification of content credential manifests. The library does not cap iterations, allocation size, or recursion depth when handling untrusted input. Any workflow that feeds attacker-controlled files into the SDK inherits the exposure.

Attack Vector

The attack vector is local. An attacker must deliver a crafted asset to an application that invokes the vulnerable SDK on the local system. Delivery can occur through drag-and-drop, file-open dialogs, batch processing queues, or shared directories monitored by a workflow engine. No authentication or user interaction with the SDK itself is required once the file is processed.

Adobe describes the exploitation mechanics in the Adobe Security Bulletin APSB26-111. No verified public exploit code exists for CVE-2026-48443.

Detection Methods for CVE-2026-48443

Indicators of Compromise

Sudden termination or hang of processes that invoke the Adobe CAI Content Credentials SDK
Sustained CPU saturation or rapid memory growth in processes handling .c2pa manifests or media containing content credentials
Repeated crash events or watchdog restarts of workflow engines that ingest third-party media assets

Detection Strategies

Baseline normal CPU and memory usage for applications that embed the SDK, and alert on statistical deviations
Monitor operating system telemetry for out-of-memory kills or process crashes tied to CAI-enabled binaries
Inspect ingestion pipelines for repeated processing failures on the same source asset, which can indicate crafted input

Monitoring Recommendations

Collect endpoint process telemetry including resource usage, exit codes, and file-open events for CAI SDK consumers
Forward this telemetry to a central analytics platform where behavioral baselines can be enforced
Track file provenance for media assets entering automated content authenticity workflows

How to Mitigate CVE-2026-48443

Immediate Actions Required

Inventory all applications and services that embed the Adobe CAI Content Credentials SDK
Apply the fixed SDK version identified in Adobe Security Bulletin APSB26-111
Restrict which users and processes can submit untrusted media assets into CAI-enabled workflows
Enforce operating system resource limits (ulimit, cgroups, job objects) on processes that call the SDK

Patch Information

Adobe has published the fix in Adobe Security Bulletin APSB26-111. Consult the bulletin for the specific fixed version of the Content Authenticity SDK and update all downstream applications that bundle the library. Rebuild and redeploy any in-house tooling that statically links the SDK.

Workarounds

Isolate CAI SDK processing in sandboxed workers with hard CPU and memory limits, and automatic restart on failure
Validate and size-limit input assets before passing them to the SDK, rejecting files that exceed policy thresholds
Disable automated ingestion of untrusted third-party content until the patched SDK is deployed

bash

# Example: constrain a CAI SDK worker with systemd resource limits
# /etc/systemd/system/cai-worker.service.d/limits.conf
[Service]
MemoryMax=512M
CPUQuota=50%
TasksMax=64
TimeoutStopSec=30
Restart=on-failure