Improper input validation in Adobe C2pa
CVE-2026-71390
CAI Content Credentials is affected by an Improper Input Validation vulnerability that could result in a Security feature bypass. An attacker could leverage this vulnerability to bypass security measures and gain unauthorized limited write access. Exploitation of this issue does not require user interaction.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (17.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 17.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Adobe C2pa
- Adobe C2patool
- Adobe C2pa-Web
- Adobe Content Credentials Command-Line Tool — versions 0, c2patool-v0.27.6
- Adobe Content Credentials Js Sdk — versions 0, @contentauth/c2pa-web@0.12.1
- Adobe Content Credentials Rust Sdk — versions 0, c2pa-v0.90.6
Weakness classification (CWE)
References
- helpx.adobe.com/security/products/content-authenticity-sdk/apsb26-111.html (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-71390?
- CVE-2026-71390 is a medium-severity vulnerability in Adobe C2pa, classified under Improper Input Validation. CVSS score: 4.0/10. Published 2026-08-11.
- How severe is CVE-2026-71390?
- Medium severity. CVSS v3 base score is 4.0 out of 10.