CVE-2026-48290: Adobe C2pa SSRF Vulnerability

CVE-2026-48290 Overview

CVE-2026-48290 is a Server-Side Request Forgery (SSRF) vulnerability [CWE-918] affecting Adobe's Content Authenticity Initiative (CAI) Content Credentials software. The flaw allows an attacker to trigger arbitrary code execution in the context of the current user by inducing the application to fetch and process attacker-controlled resources. Successful exploitation can lead to script injection, elevated access, or session hijacking within the victim's environment. The vulnerability requires user interaction: a victim must visit a maliciously crafted URL or interact with a compromised web page. Adobe published advisory APSB26-80 covering the affected Content Authenticity SDK components.

Critical Impact
Successful exploitation results in arbitrary code execution in the context of the current user, with a scope change that can extend impact beyond the vulnerable component.

Affected Products

Adobe c2pa (Rust library)
Adobe c2pa-web (Node.js library)
Adobe c2patool command-line utility (across Windows, macOS, Linux, iOS, and Android host platforms)

Discovery Timeline

2026-07-14 - CVE-2026-48290 published to NVD
2026-07-16 - Last updated in NVD database

Technical Details for CVE-2026-48290

Vulnerability Analysis

The vulnerability resides in the Coalition for Content Provenance and Authenticity (C2PA) implementations distributed by Adobe under the Content Authenticity Initiative. These libraries and tools parse content credentials embedded in media assets to verify provenance. During this process, the affected components can be induced to issue outbound requests to attacker-controlled endpoints. The SSRF condition allows an attacker to steer the application into fetching remote resources that are subsequently processed unsafely. Because the scope changes upon exploitation, the impact extends beyond the vulnerable component into the user's broader session and application context.

Root Cause

The root cause is insufficient validation of URLs or resource references processed by the C2PA libraries [CWE-918]. When the parser encounters a reference to an external resource embedded in a manifest, it dereferences that resource without adequately restricting the destination or the content type. This permits an attacker to redirect the request to internal endpoints or to controlled servers delivering payloads that lead to script execution.

Attack Vector

Exploitation requires local user interaction. A victim must open a maliciously crafted asset, visit a crafted URL, or interact with a compromised web page that invokes the vulnerable C2PA processing path. Once triggered, the application performs the attacker-directed request and processes the response, resulting in arbitrary code execution within the current user's context. No prior authentication is required from the attacker.

No public proof-of-concept exploit code is available. Refer to the Adobe Security Advisory APSB26-80 for authoritative technical detail.

Detection Methods for CVE-2026-48290

Indicators of Compromise

Unexpected outbound network connections originating from c2patool, applications embedding c2pa (Rust), or Node.js processes loading c2pa-web.
Requests from C2PA processing hosts to internal RFC1918 addresses, cloud metadata endpoints (169.254.169.254), or unfamiliar external domains.
Media files or manifests containing external resource references pointing to non-Adobe or untrusted infrastructure.

Detection Strategies

Inspect process telemetry for c2patool or applications linking the C2PA SDK spawning child processes or scripting hosts shortly after opening media content.
Correlate file-open events for .c2pa, .jpg, .png, or other media assets with immediate outbound HTTP/HTTPS traffic from the parsing process.
Monitor Node.js runtimes loading c2pa-web for unusual http/https module invocations targeting non-allowlisted hosts.

Monitoring Recommendations

Deploy egress filtering on developer and creative workstations to block C2PA processes from reaching internal management interfaces and cloud metadata services.
Enable command-line and process-lineage logging on hosts running c2patool and forward events to a central analytics platform for correlation.
Alert on newly written executables or scripts in user-writable paths immediately following C2PA library invocation.

How to Mitigate CVE-2026-48290

Immediate Actions Required

Apply the updates referenced in Adobe Security Advisory APSB26-80 to all instances of c2pa, c2pa-web, and c2patool.
Inventory build pipelines, publishing workflows, and desktop installations that consume the Adobe Content Authenticity SDK and prioritize patching those endpoints.
Instruct users to avoid opening C2PA-signed media from untrusted sources until patches are deployed.

Patch Information

Adobe has released fixed versions of the Content Authenticity SDK components. Consult Adobe Security Advisory APSB26-80 for the specific fixed versions of c2pa, c2pa-web, and c2patool, along with upgrade guidance.

Workarounds

Restrict outbound network access from processes and containers that invoke C2PA parsing to an allowlist of Adobe and verified provenance endpoints.
Run c2patool and C2PA-integrated applications under least-privilege user accounts to limit the blast radius of arbitrary code execution.
Disable automatic C2PA manifest fetching for external resources in downstream applications where such controls are exposed.

bash

# Example: block C2PA tooling from reaching cloud metadata and internal ranges (Linux nftables)
nft add rule inet filter output \
  meta skuid $(id -u c2pa-user) \
  ip daddr { 169.254.169.254, 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16 } \
  drop