High severity · published Oct 13, 2026
CVE-2026-100121
CAI Content Credentials | Improper Certificate Validation (CWE-295)
7.5
CVSS
0.3%
EPSS
No
On KEV
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. Exploitation of this issue does not require user interaction.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 22% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CT
C2PA Tool · Adobe
through c2patool-v0.27.15 · source: vendor
CC
Content Credentials JS SDK · Adobe
through @contentauth/c2pa-web@0.13.4 · source: vendor
CC
Content Credentials Rust SDK · Adobe
through c2pa-v0.90.15 · source: vendor
C2
C2pa · Adobe
before 0.91.1 · source: NVD
C2
C2pa-web · Adobe
before 0.15.3 · source: NVD
C2
C2patool · Adobe
before 0.28.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-100121
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-100121
vendor-advisory
https://www.adobe.com/trust/security/products/content-credentials-sdk/apsb26-163.html
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