What is CVE-2016-5360?

CVE-2016-5360 is a high-severity vulnerability in Haproxy, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2016-06-30.

How severe is CVE-2016-5360?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Haproxy

CVE-2016-5360

HAproxy 1.6.x before 1.6.6, when a deny comes from a reqdeny rule, allows remote attackers to cause a denial of service (uninitialized memory access and crash) or possibly have unspecified other impact via unknown vectors.

Vulnerability class: Buffer Overflow

Published 2016-06-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.428 (98.7th percentile), scored 2026-09-28.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 99th percentile — 98.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.428 · newest: 0.428 · change: 0.000

Affected products

Haproxy — versions 1.6.0, 1.6.1, 1.6.2
Canonical Ubuntu Linux — versions 16.04

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

www.openwall.com/lists/oss-security/2016/06/09/6 (mailing-list)
git.haproxy.org/
www.ubuntu.com/usn/USN-3011-1 (vendor-advisory)
www.openwall.com/lists/oss-security/2016/06/09/5 (mailing-list)

Frequently asked questions

What is CVE-2016-5360?: CVE-2016-5360 is a high-severity vulnerability in Haproxy, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2016-06-30.
How severe is CVE-2016-5360?: High severity. CVSS v3 base score is 7.5 out of 10.