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CVE-2016-5360

46
FAUCET Score

CVE-2016-5360 describes a denial-of-service vulnerability in HAProxy versions 1.6.x prior to 1.6.6. This flaw, triggered when a reqdeny rule is applied, can lead to an uninitialized memory access and crash, potentially causing a complete service outage. With a CVSS score of 7.5 (High), it is easily exploitable over the network without authentication or user interaction, impacting availability. Despite its high severity and potential for disruption, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
1.6.0CPE matchmatch criteria
cpe:2.3:a:haproxy:haproxy:1.6.0:*:*:*:*:*:*:*
1.6.1CPE matchmatch criteria
cpe:2.3:a:haproxy:haproxy:1.6.1:*:*:*:*:*:*:*
1.6.2CPE matchmatch criteria
cpe:2.3:a:haproxy:haproxy:1.6.2:*:*:*:*:*:*:*
1.6.3CPE matchmatch criteria
cpe:2.3:a:haproxy:haproxy:1.6.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
42.82%
Probability of exploitation in next 30 days
EPSS Percentile
98.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.4282 is in the 97th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2016-5360Moderate

haproxy: denial of service via reqdeny

Jun 9, 2016

References

git.haproxy.org
openwall.com / lists/oss-security/2016/06/09/5
openwall.com / lists/oss-security/2016/06/09/6
ubuntu.com / usn/USN-3011-1