CVE-2026-34678: Adobe CAI Content Credentials denial of service via resource consumption

CVE-2026-34678 · Severity: medium · CVSS 6.2 · Published 2026-05-12

Adobe CAI Content Credentials, a toolset used to verify the authenticity and origin of digital content, is affected by a flaw that allows for resource exhaustion. An attacker can exploit this to crash applications or make them unresponsive, potentially disrupting workflows that rely on verifying digital media. This issue does not require any user interaction to trigger.

Technologies: Adobe C2pa, Adobe c2pa-v (Rust SDK), Adobe C2pa-Web, Adobe Content Credentials SDK. Vendors: Adobe.

Quick answers

Is CVE-2026-34678 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-34678 being exploited in the wild.
How severe is CVE-2026-34678?
Medium severity, with a CVSS score of 6.2, published 12 May 2026.
Which products and versions are affected?
Adobe c2pa-v (Rust SDK) <= 0.78.2; Adobe C2pa-Web <= 0.7.0; Adobe Content Credentials SDK 0.78.2, 0.7.0 and earlier.
Is there a fix for CVE-2026-34678?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-34678 attacked?
It is attacked with local access, in a software library.
Am I affected by CVE-2026-34678?
Check whether you run Adobe C2pa, Adobe c2pa-v (Rust SDK), Adobe C2pa-Web or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The Adobe Content Authenticity Initiative (CAI) SDKs, specifically the Rust (c2pa-v) and Web (c2pa-web) implementations, contain a CWE-400 vulnerability involving uncontrolled resource consumption. The flaw allows an attacker to trigger excessive system resource usage, resulting in an application-level denial-of-service (DoS). The attack vector is classified as local, meaning the attacker must have the ability to provide input to the affected library on the host system. No user interaction or specific privileges are required to trigger the exhaustion. Patches are available in c2pa-web 0.7.1 and c2pa-v 0.80.1.

Affected products

  • Adobe c2pa-web <= 0.7.0
  • Adobe c2pa-v (Rust SDK) <= 0.78.2

Timeline

  • 2026-05-12: disclosed
  • 2026-05-12: advisory

References

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