CVE-2026-100116: c2pa Cert Validation Flaw — Fix

Description

CAI Content Credentials is affected by an Improper Certificate Validation vulnerability that could result in a Security feature bypass. An attacker could leverage this vulnerability to bypass security measures and gain unauthorized write access. Exploit depends on conditions beyond the attacker's control. Exploitation of this issue does not require user interaction.

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CVSS v3.1 Score

5.9

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS — Exploit Prediction

0.0024

Probability of exploitation

0.15%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-295 CWE-295

Affected Products

Vendor	Product	Versions
adobe	c2pa	< 0.91.1
adobe	c2pa-web	< 0.15.3
adobe	c2patool	< 0.28.1

References

Advisories & Patches

https://www.adobe.com/trust/security/products/content-credentials-sdk/apsb26-163.html

Frequently Asked Questions

What is CVE-2026-100116? +

CAI Content Credentials is affected by an Improper Certificate Validation vulnerability that could result in a Security feature bypass. An attacker could leverage this vulnerability to bypass security measures and gain unauthorized write access. Exploit depends on conditions beyond the attacker's control. Exploitation of this issue does not require user interaction. It has a CVSS v3.1 base score of 5.9 (MEDIUM).

How severe is CVE-2026-100116? +

CVE-2026-100116 has a CVSS v3.1 score of 5.9 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0024, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-100116? +

CVE-2026-100116 affects products from adobe, specifically: c2pa, c2pa-web, c2patool. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-100116? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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