CVE-2026-34666: Adobe CAI Content Credentials denial of service via improper input validation

CVE-2026-34666 · 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 security flaw that can cause applications using it to crash. By providing specially crafted input, an attacker can trigger a denial-of-service condition, making the affected software unavailable. This could disrupt workflows that rely on verifying digital media provenance and content authenticity.

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

Quick answers

Is CVE-2026-34666 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-34666 being exploited in the wild.
How severe is CVE-2026-34666?
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-2026-34666?
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-2026-34666 attacked?
It is attacked with local access, in a software library.
Am I affected by CVE-2026-34666?
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

An improper input validation vulnerability (CWE-20) exists in the Adobe Content Authenticity Initiative (CAI) SDKs, specifically the c2pa-web (Node.js) and c2pa-v (Rust) implementations. The flaw allows an attacker to provide malformed input that the library fails to process correctly, leading to an application crash. The attack vector is classified as local, meaning the attacker must be able to provide input to an application utilizing these libraries. No user interaction or specific privileges are required to trigger the crash. Patches are available in c2pa-web version 0.7.1 and c2pa-v version 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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