Path Traversal in Adobe C2pa
CVE-2026-34657
CAI Content Credentials versions c2pa-web@0.7.1, c2pa-v0.80.1 and earlier are affected by an Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability that could result in an arbitrary file system write. An attacker could leverage this vulnerability to write to unauthorized files or directories outside of intended restrictions. Exploitation of this issue requires user interaction in that a victim must extract a maliciously crafted file.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.003 (19.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 19.2% 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
Weakness classification (CWE)
References
- helpx.adobe.com/security/products/content-authenticity-sdk/apsb26-61.html (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-34657?
- CVE-2026-34657 is a medium-severity vulnerability in Adobe C2pa, classified under Path Traversal. CVSS score: 5.5/10. Published 2026-06-09.
- How severe is CVE-2026-34657?
- Medium severity. CVSS v3 base score is 5.5 out of 10.