CVE-2026-34657 CAI Content Credentials | Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (CWE-22)

Medium 5.5 Published 9 Jun 2026 Updated 27 Aug 2026

An attacker can write to unauthorized files via a maliciously crafted file, requiring user interaction to extract it.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-34657?

CVE-2026-34657 is a medium-severity path traversal vulnerability in Adobe C2pa, published on 9 Jun 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

CAI Content Credentials versions [email protected], 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.

Weakness: CWE-22

Which versions are affected by CVE-2026-34657?

It affects 2 products.

Products include Adobe C2pa, Adobe C2pa-Web.

How do I fix CVE-2026-34657?

No fix has been published for CVE-2026-34657 yet. Limit exposure of the affected software until one is available.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2026-34657 being exploited?

There is no known exploitation of CVE-2026-34657 in the wild and no public exploit code.

All Adobe C2pa vulnerabilities

Sources

Also known as GHSA-hvmh-vjjx-rw3h.