Is CVE-2026-122100 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-122100 being exploited in the wild.

How severe is CVE-2026-122100?

Medium severity, with a CVSS score of 5.5, published 10 November 2026.

Which products and versions are affected?

Adobe C2PA Tool c2patool-v0.28.5 and earlier; Adobe Content Credentials Rust SDK c2pa-v0.91.10 and earlier.

Is there a fix for CVE-2026-122100?

Yes: fixed in Content Credentials Rust SDK c2pa-v0.91.11, C2PA Tool c2patool-v0.28.6. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-122100 attacked?

It is attacked with local access.

Am I affected by CVE-2026-122100?

Check whether you run Adobe C2PA Tool or Adobe Content Credentials Rust SDK 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.

CVE-2026-122100: Adobe Content Credentials SDK improper cryptographic signature verification

CVE-2026-122100 · Severity: medium · CVSS 5.5 · Published 2026-11-10

Adobe Content Credentials SDK validates digital signatures to ensure content authenticity and integrity. An attacker can forge or bypass signature validation through improper verification logic, gaining unauthorized write access to content. A user must interact with a malicious URL or compromised web page for the attack to succeed.

Technologies: Adobe C2PA Tool, Adobe Content Credentials Rust SDK. Vendors: Adobe.

Quick answers

Is CVE-2026-122100 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-122100 being exploited in the wild.
How severe is CVE-2026-122100?: Medium severity, with a CVSS score of 5.5, published 10 November 2026.
Which products and versions are affected?: Adobe C2PA Tool c2patool-v0.28.5 and earlier; Adobe Content Credentials Rust SDK c2pa-v0.91.10 and earlier.
Is there a fix for CVE-2026-122100?: Yes: fixed in Content Credentials Rust SDK c2pa-v0.91.11, C2PA Tool c2patool-v0.28.6. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-122100 attacked?: It is attacked with local access.
Am I affected by CVE-2026-122100?: Check whether you run Adobe C2PA Tool or Adobe Content Credentials Rust SDK 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-v0.91.11, C2PA Tool c2patool-v0.28.6

Technical details

CVE-2026-122100 is an improper verification of cryptographic signature vulnerability (CWE-347) in the Content Credentials SDK that allows attackers to bypass security features. The attack requires local access and user interaction (visiting a malicious URL or web page). Exploitation results in integrity compromise—unauthorized modification of protected content.

Affected products

Adobe Content Credentials Rust SDK c2pa-v0.91.10 and earlier
Adobe C2PA Tool c2patool-v0.28.5 and earlier

Timeline

2026-11-10: disclosed

References

https://www.adobe.com/trust/security/products/content-credentials-sdk/apsb26-184.html

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