PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-34657 Adobe CVE debrief

CVE-2026-34657 is a Path Traversal vulnerability affecting CAI Content Credentials versions [email protected], c2pa-v0.80.1, and earlier. This vulnerability could result in an arbitrary file system write, allowing an attacker to write to unauthorized files or directories outside of intended restrictions. Exploitation of this issue requires user interaction, as a victim must extract a maliciously crafted file.

Vendor
Adobe
Product
CAI Content Credentials
CVSS
MEDIUM 5.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-09
Original CVE updated
2026-08-28
Advisory published
2026-06-09
Advisory updated
2026-08-28

Who should care

Users of CAI Content Credentials versions [email protected], c2pa-v0.80.1, and earlier should be aware of this vulnerability and take necessary precautions.

Technical summary

The vulnerability has a CVSS score of 5.5 and a severity of MEDIUM. The CVSS vector is CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N. The weakness is classified as CWE-22.

Defensive priority

MEDIUM

Recommended defensive actions

  • Update to a version of CAI Content Credentials that is not affected by this vulnerability.
  • Be cautious when extracting files from untrusted sources.

Evidence notes

The CVE record was published on 2026-06-09T22:16:22.787Z and modified on 2026-06-10T18:35:49.083Z. The vendor is listed as Unknown Vendor, but there is evidence suggesting the vendor may be Adobe.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-34657 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-34657

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-34657 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-34657

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.