CVE-2026-48357: Adobe C2pa DOS Vulnerability

CVE-2026-48357 Overview

CVE-2026-48357 is an Uncontrolled Resource Consumption vulnerability [CWE-400] affecting Adobe's Content Authenticity Initiative (CAI) Content Credentials software. The flaw allows a local attacker to exhaust system resources and trigger an application denial-of-service condition. Exploitation requires no user interaction and no privileges. The vulnerability impacts the c2pa Rust library, the c2pa-web Node.js package, and the c2patool command-line utility across Windows, macOS, Linux, iOS, and Android platforms. Adobe published Security Advisory APSB26-80 to address the issue.

Critical Impact
A local attacker can trigger high availability impact by causing the affected C2PA components to exhaust CPU or memory, disrupting content verification workflows that depend on Content Credentials.

Affected Products

Adobe c2pa (Rust library)
Adobe c2pa-web (Node.js package)
Adobe c2patool (command-line utility)

Discovery Timeline

2026-07-14 - CVE-2026-48357 published to NVD
2026-07-16 - Last updated in NVD database

Technical Details for CVE-2026-48357

Vulnerability Analysis

CVE-2026-48357 is a resource exhaustion issue in Adobe's C2PA reference implementations. The C2PA libraries parse and verify Content Credentials, which are cryptographically signed manifests attached to media assets that describe provenance and edit history. Processing an attacker-supplied asset or manifest causes the C2PA components to consume CPU or memory without bound, halting the host application.

The vulnerability sits in the local attack surface. An attacker must place a crafted input where a C2PA consumer will process it, such as a media file loaded by an application that embeds the c2pa crate or invokes c2patool. Applications that batch-verify content, run automated pipelines, or accept user-uploaded media for provenance checks are most exposed.

Because the C2PA libraries are consumed by third-party applications, the impact scope extends beyond Adobe products to any software integrating the affected SDK.

Root Cause

The root cause is Uncontrolled Resource Consumption [CWE-400]. The affected C2PA parsing or verification logic does not enforce bounds on the resources allocated when processing a manifest. Adobe has not publicly disclosed the specific parser field or code path involved. Refer to the Adobe Security Advisory APSB26-80 for vendor-provided technical detail.

Attack Vector

Exploitation is local. An attacker delivers a malformed or maliciously structured Content Credentials manifest, embedded in a media file or supplied directly to c2patool, to a workflow that invokes the vulnerable SDK. When the C2PA component parses the input, resource consumption spikes and the hosting process becomes unresponsive or terminates. No authentication or user interaction is required to trigger the condition once the input reaches the parser.

See the Adobe Security Advisory APSB26-80 for vendor guidance on affected versions and exploitation prerequisites.

Detection Methods for CVE-2026-48357

Indicators of Compromise

Sustained high CPU or memory usage by processes linked against the c2pa library or running c2patool.
Application hangs, unresponsive verification pipelines, or process crashes coincident with ingestion of external media assets.
Repeated failed or timed-out Content Credentials verification operations on specific input files.

Detection Strategies

Inventory applications that bundle Adobe's c2pa, c2pa-web, or c2patool components and track their versions against APSB26-80.
Monitor process telemetry for anomalous resource consumption by C2PA verification processes, particularly during batch ingestion of user-supplied media.
Correlate application crash events with recent file writes or uploads containing embedded Content Credentials manifests.

Monitoring Recommendations

Enable per-process CPU and memory quotas on services that invoke c2patool in automated pipelines and alert on quota breaches.
Log all inputs passed to C2PA verification routines and retain samples of files that trigger timeouts or resource limits.
Track EDR telemetry for repeated abnormal termination of media processing workers on Windows, macOS, and Linux hosts.

How to Mitigate CVE-2026-48357

Immediate Actions Required

Apply the updates listed in Adobe Security Advisory APSB26-80 to all deployments of c2pa, c2pa-web, and c2patool.
Identify third-party software in your environment that embeds the C2PA SDK and coordinate with vendors on patched builds.
Restrict which users and services can submit media for Content Credentials verification until patched versions are deployed.

Patch Information

Adobe has released fixed versions of the affected C2PA components. Refer to the Adobe Security Advisory APSB26-80 for the specific patched versions of c2pa (Rust), c2pa-web (Node.js), and c2patool. Update dependency manifests (Cargo.toml, package.json) and rebuild dependent applications against the patched releases.

Workarounds

Enforce OS-level resource limits (for example, ulimit, cgroups, or Job Objects) on processes that invoke C2PA verification.
Run C2PA verification in isolated worker processes with strict CPU time and memory ceilings so a single malicious input cannot exhaust the parent service.
Validate file size and structural sanity of inbound media before passing it to c2patool or C2PA library APIs.

bash

# Configuration example: constrain c2patool execution with systemd-run
systemd-run --scope \
  -p MemoryMax=512M \
  -p CPUQuota=50% \
  -p TimeoutStopSec=30 \
  c2patool verify /path/to/untrusted-asset.jpg