# CVE-2026-123262: CAI Content Credentials | Improper Verification of Cryptographic Signature (CWE-347)

Status: published. Published: 2026-11-10. Updated: 2026-11-12.

CAI Content Credentials is affected by an Improper Verification of Cryptographic Signature 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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Adobe / Content Credentials Rust SDK: ≥ 0; ≤ c2pa-v0.91.10 (affected, custom); c2pa-v0.91.11 (unaffected, custom). Source: CNA: adobe
- Adobe / C2PA Tool: ≥ 0; ≤ c2patool-v0.28.5 (affected, custom); c2patool-v0.28.6 (unaffected, custom). Source: CNA: adobe

## Severity and prioritization

- CVSS 3.1: 5.9 (medium); CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N; source: CNA: adobe

- CVSS 3.1: 5.9 (medium); CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N; source: NVD: psirt@adobe.com

- CISA KEV: No listing in collected sources

- EPSS: 0.53% as of 2026-11-12; percentile 45.48%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-347

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.adobe.com/trust/security/products/content-credentials-sdk/apsb26-184.html (CNA: adobe; vendor-advisory)

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

## Provenance

- CNA: adobe: https://www.cve.org/CVERecord?id=CVE-2026-123262; retrieved 2026-11-12; source updated 2026-11-12

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-123262; retrieved 2026-11-11; source updated 2026-11-10

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-123262; retrieved 2026-11-12; source updated Not reported

Revision: 5760b0c8a14cea71f44048db71bd284a6d65dd30b2317520f2d85d5883d74d0b

Canonical: https://y2.dev/cve/CVE-2026-123262

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