CVE-2026-100121: Adobe Content Credentials SDK improper certificate validation

CVE-2026-100121 · Severity: high · CVSS 7.5 · Published 2026-10-13

Adobe Content Credentials SDK—used to embed and verify authenticity credentials in digital media—contains multiple validation flaws that could allow attackers to forge credentials or bypass security checks. An attacker could exploit these vulnerabilities without user interaction to write malicious content or spoof authentic media provenance, compromising trust in digital assets.

Technologies: Adobe C2pa, Adobe C2PA Tool, Adobe C2pa-Web, Adobe C2patool, Adobe Content Credentials JS SDK, Adobe Content Credentials Rust SDK (c2pa). Vendors: Adobe.

Quick answers

Is CVE-2026-100121 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-100121 being exploited in the wild.
How severe is CVE-2026-100121?
High severity, with a CVSS score of 7.5, published 13 October 2026.
Which products and versions are affected?
Adobe C2PA Tool c2patool-v0.27.15 and earlier; Adobe Content Credentials JS SDK @contentauth/c2pa-web@0.13.4 and earlier; Adobe Content Credentials Rust SDK (c2pa) c2pa-v0.90.15 and earlier.
Is there a fix for CVE-2026-100121?
Yes: fixed in Content Credentials Rust SDK c2pa-v0.91.1; C2PA Tool c2patool-v0.28.1; Content Credentials JS SDK @contentauth/c2pa-web@0.15.3. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-100121 attacked?
It is attacked over the network.
Am I affected by CVE-2026-100121?
Check whether you run Adobe C2pa, Adobe C2PA Tool, 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.

How to fix

  • Fixed in: Content Credentials Rust SDK c2pa-v0.91.1; C2PA Tool c2patool-v0.28.1; Content Credentials JS SDK @contentauth/c2pa-web@0.15.3

Technical details

Multiple improper certificate validation, input validation, and cryptographic signature verification flaws in the Content Credentials SDK components (Rust SDK, JS SDK, C2PA Tool) allow unauthenticated network-based attackers to bypass security checks and gain unauthorized write access. No user interaction is required. Fixes are available in Content Credentials Rust SDK c2pa-v0.91.1, C2PA Tool c2patool-v0.28.1, and Content Credentials JS SDK @contentauth/c2pa-web@0.15.3.

Affected products

  • Adobe Content Credentials Rust SDK (c2pa) c2pa-v0.90.15 and earlier
  • Adobe C2PA Tool c2patool-v0.27.15 and earlier
  • Adobe Content Credentials JS SDK @contentauth/c2pa-web@0.13.4 and earlier

Timeline

  • 2026-10-13: advisory

References

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