CVE-2026-34657

Arbitrary file write via unsanitized archive paths

Published Jun 9, 2026 · Updated Jun 9, 2026

Path traversal in Adobe Content Credentials SDKs c2pa-web 0.7.1 and c2pa 0.80.1 and earlier allows attackers to write files. Builder archive loaders discard normalized paths, while ResourceStore::add joins an unvalidated resource ID to base_path before writing. A victim must extract a malicious archive; resulting writes can escape intended directories with the victim process's permissions.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Path traversal in Adobe Content Credentials SDKs c2pa-web 0.7.1 and c2pa 0.80.1 and earlier allows attackers to write files. Builder archive loaders discard normalized paths, while ResourceStore::add joins an unvalidated resource ID to base_path before writing. A victim must extract a malicious archive; resulting writes can escape intended directories with the victim process's permissions.

The record

CVE
CVE-2026-34657
Published
Jun 9, 2026
Updated
Jun 9, 2026
Vendor
Adobe
Product
Content Credentials SDK
Classifications
CWE-22, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=c2pa-v0.80.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Adobe · Content Credentials SDKversion=0 <=c2pa-v0.80.1

Published CVSS scores

5.5AdobeCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1204.002User Execution: Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo