What is CVE-2016-4326?

CVE-2016-4326 is a critical-severity vulnerability in Chef Manage. CVSS score: 9.8/10. Published 2016-06-10.

How severe is CVE-2016-4326?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Chef Manage

CVE-2016-4326

The Chef Manage (formerly opscode-manage) add-on before 1.12.0 for Chef allows remote attackers to execute arbitrary code via crafted serialized data in a cookie.

Published 2016-06-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.042 (90.6th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 90.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.042 · newest: 0.042 · change: 0.000

Affected products

Chef Manage

References

www.kb.cert.org/vuls/id/586503 (US Government Resource, Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2016-4326?: CVE-2016-4326 is a critical-severity vulnerability in Chef Manage. CVSS score: 9.8/10. Published 2016-06-10.
How severe is CVE-2016-4326?: Critical severity. CVSS v3 base score is 9.8 out of 10.