CVE-2026-47903: CAI Content Credentials DoS Vulnerability

CVE-2026-47903 Overview

CVE-2026-47903 is an improper input validation vulnerability [CWE-20] affecting Adobe's Content Authenticity Initiative (CAI) Content Credentials libraries. Affected versions include c2pa-web@0.7.1, c2pa-v0.80.1, and earlier releases. An attacker with local access can supply malformed input to crash the application, producing a denial-of-service condition. Exploitation does not require user interaction or authentication. Adobe disclosed the issue in security advisory APSB26-61.

Critical Impact

Local attackers can trigger application crashes in C2PA Content Credentials processing, disrupting media provenance verification workflows that depend on these SDKs.

Affected Products

• Adobe CAI Content Credentials c2pa-web@0.7.1 and earlier
• Adobe CAI Content Credentials c2pa-v0.80.1 and earlier
• Applications embedding the affected C2PA SDKs

Discovery Timeline

• 2026-06-09 - CVE-2026-47903 published to NVD
• 2026-06-10 - Last updated in NVD database

Technical Details for CVE-2026-47903

Vulnerability Analysis

The vulnerability resides in the input handling logic of the C2PA Content Credentials libraries. These libraries parse media manifests that bind provenance metadata to images, video, and other assets. When the parser encounters malformed or unexpected input, it fails to validate the data before processing it. The result is an unrecoverable error that terminates the host process.

The attack vector is local, meaning the attacker must deliver crafted input to a process running the affected SDK. This commonly occurs when an application ingests a malicious C2PA-signed asset for verification. Because no privileges or user interaction are required, any code path that feeds untrusted media into the library is exposed.

Impact is limited to availability. Confidentiality and integrity are not affected. Applications relying on continuous content provenance verification will experience service disruption when processing crafted inputs.

Root Cause

The defect is an improper input validation flaw [CWE-20]. The library does not enforce strict bounds or structural checks on incoming manifest data before deserialization and processing. Malformed structures reach internal logic that cannot handle them safely, causing the process to abort.

Attack Vector

An attacker crafts a malformed C2PA asset or manifest and delivers it to a workflow that uses c2pa-web or the c2pa Rust crate for verification. Examples include batch ingestion pipelines, content authoring tools, and verification services that automatically scan uploaded media. Processing the crafted input crashes the consuming application.

No verified public exploit code is available. Refer to the Adobe Security Advisory APSB26-61 for vendor technical details.

Detection Methods for CVE-2026-47903

Indicators of Compromise

• Unexpected process termination or crash events in services that invoke c2pa-web or the c2pa Rust library
• Crash dumps or stack traces referencing C2PA manifest parsing routines
• Repeated submission of malformed media assets to ingestion endpoints from a single source

Detection Strategies

• Monitor application logs for fatal parser errors and panics originating in C2PA verification components
• Correlate media upload events with subsequent process exits to identify crash-trigger patterns
• Alert on abnormal restart loops for services that perform provenance verification at scale

Monitoring Recommendations

• Track version inventories of c2pa-web and c2pa across applications and developer environments
• Capture telemetry on file format, size, and source for assets submitted to verification pipelines
• Forward crash diagnostics to a centralized logging platform for trend analysis

How to Mitigate CVE-2026-47903

Immediate Actions Required

• Inventory all applications and pipelines that bundle c2pa-web@0.7.1, c2pa-v0.80.1, or earlier versions
• Upgrade to the patched releases listed in Adobe advisory APSB26-61
• Restrict the sources permitted to submit media for C2PA verification until patches are applied

Patch Information

Adobe addressed the issue in updated releases of the Content Authenticity SDK. Consult the Adobe Security Advisory APSB26-61 for fixed version numbers and download locations.

Workarounds

• Validate or sanitize media inputs at the application boundary before invoking C2PA parsing
• Isolate verification workloads in sandboxed processes that can be restarted without affecting the main service
• Apply rate limiting and source allowlisting to ingestion endpoints that consume third-party media