CVE & CISA-KEV Catalog

CVE-2023-40225

HIGHEPSS 81th pctl

7.2

CVSS v3

Description

HAProxy through 2.0.32, 2.1.x and 2.2.x through 2.2.30, 2.3.x and 2.4.x through 2.4.23, 2.5.x and 2.6.x before 2.6.15, 2.7.x before 2.7.10, and 2.8.x before 2.8.2 forwards empty Content-Length headers, violating RFC 9110 section 8.6. In uncommon cases, an HTTP/1 server behind HAProxy may interpret the payload as an extra request.

How to fix

Remediation Available

haproxyAmazon

Fixed in:0:2.8.0-1.amzn2023.0.2

Fixed in:0:2.8.0-1.amzn2023.0.2

haproxy-debuginfoAmazon

Fixed in:0:2.8.0-1.amzn2023.0.2

Fixed in:0:2.8.0-1.amzn2023.0.2

haproxy-debugsourceAmazon

Fixed in:0:2.8.0-1.amzn2023.0.2

Fixed in:0:2.8.0-1.amzn2023.0.2

haproxyDebian

Fixed in:2.6.12-1+deb12u1CVE-2023-40225

Fixed in:2.6.15-1CVE-2023-40225

Fixed in:2.6.15-1CVE-2023-40225

bpftoolRocky

Fixed in:0:4.18.0-372.87.1.el8_6RHSA-2024:0200

Fixed in:0:4.18.0-372.87.1.el8_6RHSA-2024:0200

Fixed in:0:4.18.0-372.87.1.el8_6RHSA-2024:0200

Fixed in:0:4.18.0-372.87.1.el8_6RHSA-2024:0200

Fixed in:0:7.0.0-284.43.1.el9_2RHSA-2023:7606

Fixed in:0:7.0.0-284.43.1.el9_2RHSA-2023:7606

Fixed in:0:7.0.0-284.43.1.el9_2RHSA-2023:7606

Fixed in:0:7.0.0-284.43.1.el9_2RHSA-2023:7606

bpftoolRed Hat / RHEL

Fixed in:0:4.18.0-372.87.1.el8_6RHSA-2024:0200

Fixed in:0:4.18.0-372.87.1.el8_6RHSA-2024:0200

Fixed in:0:4.18.0-372.87.1.el8_6RHSA-2024:0200

Fixed in:0:4.18.0-372.87.1.el8_6RHSA-2024:0200

Fixed in:0:7.0.0-284.43.1.el9_2RHSA-2023:7606

Fixed in:0:7.0.0-284.43.1.el9_2RHSA-2023:7606

Fixed in:0:7.0.0-284.43.1.el9_2RHSA-2023:7606

Fixed in:0:7.0.0-284.43.1.el9_2RHSA-2023:7606

bpftool-debuginfoRocky

Fixed in:0:4.18.0-372.87.1.el8_6RHSA-2024:0200

Fixed in:0:4.18.0-372.87.1.el8_6RHSA-2024:0200

Fixed in:0:4.18.0-372.87.1.el8_6RHSA-2024:0200

Fixed in:0:4.18.0-372.87.1.el8_6RHSA-2024:0200

Fixed in:0:7.0.0-284.43.1.el9_2RHSA-2023:7606

Fixed in:0:7.0.0-284.43.1.el9_2RHSA-2023:7606

Fixed in:0:7.0.0-284.43.1.el9_2RHSA-2023:7606

Fixed in:0:7.0.0-284.43.1.el9_2RHSA-2023:7606

bpftool-debuginfoRed Hat / RHEL

Fixed in:0:4.18.0-372.87.1.el8_6RHSA-2024:0200

Fixed in:0:4.18.0-372.87.1.el8_6RHSA-2024:0200

Fixed in:0:4.18.0-372.87.1.el8_6RHSA-2024:0200

Fixed in:0:4.18.0-372.87.1.el8_6RHSA-2024:0200

Fixed in:0:7.0.0-284.43.1.el9_2RHSA-2023:7606

Fixed in:0:7.0.0-284.43.1.el9_2RHSA-2023:7606

Fixed in:0:7.0.0-284.43.1.el9_2RHSA-2023:7606

Fixed in:0:7.0.0-284.43.1.el9_2RHSA-2023:7606

containernetworking-pluginsRed Hat / RHEL

Fixed in:1:1.4.0-1.rhaos4.12.el8RHSA-2024:0200

Fixed in:1:1.4.0-1.rhaos4.12.el8RHSA-2024:0200

Fixed in:1:1.4.0-1.rhaos4.11.el8RHSA-2024:0308

Fixed in:1:1.4.0-1.rhaos4.11.el8RHSA-2024:0308

Fixed in:1:1.4.0-1.rhaos4.12.el8RHSA-2024:0200

Fixed in:1:1.4.0-1.rhaos4.12.el8RHSA-2024:0200

Fixed in:1:1.4.0-1.rhaos4.11.el8RHSA-2024:0308

Fixed in:1:1.4.0-1.rhaos4.12.el8RHSA-2024:0200

containernetworking-pluginsRocky

Fixed in:1:1.4.0-1.rhaos4.12.el8RHSA-2024:0200

Fixed in:1:1.4.0-1.rhaos4.12.el8RHSA-2024:0200

Fixed in:1:1.4.0-1.rhaos4.12.el8RHSA-2024:0200

Fixed in:1:1.4.0-1.rhaos4.11.el8RHSA-2024:0308

Fixed in:1:1.4.0-1.rhaos4.12.el8RHSA-2024:0200

Fixed in:1:1.4.0-1.rhaos4.11.el8RHSA-2024:0308

Fixed in:1:1.4.0-1.rhaos4.11.el8RHSA-2024:0308

Fixed in:1:1.4.0-1.rhaos4.11.el8RHSA-2024:0308

containernetworking-plugins-debuginfoRocky

Fixed in:1:1.4.0-1.rhaos4.12.el8RHSA-2024:0200

Fixed in:1:1.4.0-1.rhaos4.11.el8RHSA-2024:0308

Fixed in:1:1.4.0-1.rhaos4.11.el8RHSA-2024:0308

Fixed in:1:1.4.0-1.rhaos4.11.el8RHSA-2024:0308

Fixed in:1:1.4.0-1.rhaos4.11.el8RHSA-2024:0308

Fixed in:1:1.4.0-1.rhaos4.12.el8RHSA-2024:0200

Fixed in:1:1.4.0-1.rhaos4.12.el8RHSA-2024:0200

Fixed in:1:1.4.0-1.rhaos4.12.el8RHSA-2024:0200

containernetworking-plugins-debuginfoRed Hat / RHEL

Fixed in:1:1.4.0-1.rhaos4.11.el8RHSA-2024:0308

Fixed in:1:1.4.0-1.rhaos4.11.el8RHSA-2024:0308

Fixed in:1:1.4.0-1.rhaos4.12.el8RHSA-2024:0200

Fixed in:1:1.4.0-1.rhaos4.11.el8RHSA-2024:0308

Fixed in:1:1.4.0-1.rhaos4.12.el8RHSA-2024:0200

Fixed in:1:1.4.0-1.rhaos4.12.el8RHSA-2024:0200

Fixed in:1:1.4.0-1.rhaos4.12.el8RHSA-2024:0200

Fixed in:1:1.4.0-1.rhaos4.11.el8RHSA-2024:0308

containernetworking-plugins-debugsourceRed Hat / RHEL

Fixed in:1:1.4.0-1.rhaos4.11.el8RHSA-2024:0308

Fixed in:1:1.4.0-1.rhaos4.11.el8RHSA-2024:0308

Fixed in:1:1.4.0-1.rhaos4.12.el8RHSA-2024:0200

Fixed in:1:1.4.0-1.rhaos4.12.el8RHSA-2024:0200

Fixed in:1:1.4.0-1.rhaos4.11.el8RHSA-2024:0308

Fixed in:1:1.4.0-1.rhaos4.12.el8RHSA-2024:0200

Fixed in:1:1.4.0-1.rhaos4.11.el8RHSA-2024:0308

Fixed in:1:1.4.0-1.rhaos4.12.el8RHSA-2024:0200

containernetworking-plugins-debugsourceRocky

Fixed in:1:1.4.0-1.rhaos4.11.el8RHSA-2024:0308

Fixed in:1:1.4.0-1.rhaos4.11.el8RHSA-2024:0308

Fixed in:1:1.4.0-1.rhaos4.12.el8RHSA-2024:0200

Fixed in:1:1.4.0-1.rhaos4.12.el8RHSA-2024:0200

Fixed in:1:1.4.0-1.rhaos4.12.el8RHSA-2024:0200

Fixed in:1:1.4.0-1.rhaos4.12.el8RHSA-2024:0200

Fixed in:1:1.4.0-1.rhaos4.11.el8RHSA-2024:0308

Fixed in:1:1.4.0-1.rhaos4.11.el8RHSA-2024:0308

cri-oRed Hat / RHEL

Fixed in:0:1.25.5-4.rhaos4.12.git778644f.el8RHSA-2024:0200

Fixed in:0:1.25.5-4.rhaos4.12.git778644f.el8RHSA-2024:0200

Fixed in:0:1.27.2-2.rhaos4.14.git9d684e2.el8RHSA-2023:7473

Fixed in:0:1.25.5-4.rhaos4.12.git778644f.el8RHSA-2024:0200

Fixed in:0:1.25.5-4.rhaos4.12.git778644f.el8RHSA-2024:0200

Fixed in:0:1.27.2-2.rhaos4.14.git9d684e2.el8RHSA-2023:7473

Fixed in:0:1.27.2-2.rhaos4.14.git9d684e2.el8RHSA-2023:7473

Fixed in:0:1.25.5-4.rhaos4.12.git778644f.el8RHSA-2024:0200

cri-oRocky

Fixed in:0:1.27.2-2.rhaos4.14.git9d684e2.el8RHSA-2023:7473

Fixed in:0:1.25.5-4.rhaos4.12.git778644f.el8RHSA-2024:0200

Fixed in:0:1.27.2-2.rhaos4.14.git9d684e2.el8RHSA-2023:7473

Fixed in:0:1.25.5-4.rhaos4.12.git778644f.el8RHSA-2024:0200

Fixed in:0:1.27.2-2.rhaos4.14.git9d684e2.el8RHSA-2023:7473

Fixed in:0:1.25.5-4.rhaos4.12.git778644f.el8RHSA-2024:0200

Fixed in:0:1.27.2-2.rhaos4.14.git9d684e2.el8RHSA-2023:7473

Fixed in:0:1.25.5-4.rhaos4.12.git778644f.el8RHSA-2024:0200

cri-o-debuginfoRed Hat / RHEL

Fixed in:0:1.27.2-2.rhaos4.14.git9d684e2.el8RHSA-2023:7473

Fixed in:0:1.27.2-2.rhaos4.14.git9d684e2.el8RHSA-2023:7473

Fixed in:0:1.27.2-2.rhaos4.14.git9d684e2.el8RHSA-2023:7473

Fixed in:0:1.27.2-2.rhaos4.14.git9d684e2.el8RHSA-2023:7473

Fixed in:0:1.25.5-4.rhaos4.12.git778644f.el8RHSA-2024:0200

Fixed in:0:1.25.5-4.rhaos4.12.git778644f.el8RHSA-2024:0200

Fixed in:0:1.25.5-4.rhaos4.12.git778644f.el8RHSA-2024:0200

Fixed in:0:1.25.5-4.rhaos4.12.git778644f.el8RHSA-2024:0200

cri-o-debuginfoRocky

Fixed in:0:1.27.2-2.rhaos4.14.git9d684e2.el8RHSA-2023:7473

Fixed in:0:1.27.2-2.rhaos4.14.git9d684e2.el8RHSA-2023:7473

Fixed in:0:1.27.2-2.rhaos4.14.git9d684e2.el8RHSA-2023:7473

Fixed in:0:1.27.2-2.rhaos4.14.git9d684e2.el8RHSA-2023:7473

Fixed in:0:1.25.5-4.rhaos4.12.git778644f.el8RHSA-2024:0200

Fixed in:0:1.25.5-4.rhaos4.12.git778644f.el8RHSA-2024:0200

Fixed in:0:1.25.5-4.rhaos4.12.git778644f.el8RHSA-2024:0200

Fixed in:0:1.25.5-4.rhaos4.12.git778644f.el8RHSA-2024:0200

cri-o-debugsourceRocky

Fixed in:0:1.25.5-4.rhaos4.12.git778644f.el8RHSA-2024:0200

Fixed in:0:1.27.2-2.rhaos4.14.git9d684e2.el8RHSA-2023:7473

Fixed in:0:1.27.2-2.rhaos4.14.git9d684e2.el8RHSA-2023:7473

Fixed in:0:1.27.2-2.rhaos4.14.git9d684e2.el8RHSA-2023:7473

Fixed in:0:1.25.5-4.rhaos4.12.git778644f.el8RHSA-2024:0200

Fixed in:0:1.25.5-4.rhaos4.12.git778644f.el8RHSA-2024:0200

Fixed in:0:1.27.2-2.rhaos4.14.git9d684e2.el8RHSA-2023:7473

Fixed in:0:1.25.5-4.rhaos4.12.git778644f.el8RHSA-2024:0200

cri-o-debugsourceRed Hat / RHEL

Fixed in:0:1.25.5-4.rhaos4.12.git778644f.el8RHSA-2024:0200

Fixed in:0:1.27.2-2.rhaos4.14.git9d684e2.el8RHSA-2023:7473

Fixed in:0:1.27.2-2.rhaos4.14.git9d684e2.el8RHSA-2023:7473

Fixed in:0:1.25.5-4.rhaos4.12.git778644f.el8RHSA-2024:0200

Fixed in:0:1.27.2-2.rhaos4.14.git9d684e2.el8RHSA-2023:7473

Fixed in:0:1.27.2-2.rhaos4.14.git9d684e2.el8RHSA-2023:7473

Fixed in:0:1.25.5-4.rhaos4.12.git778644f.el8RHSA-2024:0200

Fixed in:0:1.25.5-4.rhaos4.12.git778644f.el8RHSA-2024:0200

haproxyRed Hat / RHEL

Fixed in:0:2.2.24-4.rhaos4.11.el8RHSA-2024:0308

Fixed in:0:2.2.24-4.rhaos4.13.el8RHSA-2023:7606

Fixed in:0:2.2.24-4.rhaos4.12.el8RHSA-2024:0200

Fixed in:0:2.6.13-2.rhaos4.14.el8RHSA-2023:7473

Fixed in:0:2.4.22-3.el9_3RHSA-2024:1142

Fixed in:0:2.4.22-3.el9_3RHSA-2024:1142

Fixed in:0:2.4.22-3.el9_3RHSA-2024:1142

Fixed in:0:2.4.22-3.el9_3RHSA-2024:1142

haproxyRocky

Fixed in:0:2.2.24-4.rhaos4.12.el8RHSA-2024:0200

Fixed in:0:2.6.13-2.rhaos4.14.el8RHSA-2023:7473

Fixed in:0:2.2.24-4.rhaos4.13.el8RHSA-2023:7606

Fixed in:0:2.2.24-4.rhaos4.11.el8RHSA-2024:0308

Fixed in:0:2.4.22-3.el9_3RHSA-2024:1142

Fixed in:0:2.4.22-3.el9_3RHSA-2024:1142

Fixed in:0:2.4.22-3.el9_3RHSA-2024:1142

Fixed in:0:2.4.17-6.el9_2.2RHSA-2024:1089

haproxy-debuginfoRocky

Fixed in:0:2.4.22-3.el9_3RHSA-2024:1142

Fixed in:0:2.4.22-3.el9_3RHSA-2024:1142

Fixed in:0:2.4.17-6.el9_2.2RHSA-2024:1089

Fixed in:0:2.4.17-6.el9_2.2RHSA-2024:1089

Fixed in:0:2.4.17-6.el9_2.2RHSA-2024:1089

Fixed in:0:2.4.17-6.el9_2.2RHSA-2024:1089

Fixed in:0:2.4.22-3.el9_3RHSA-2024:1142

Fixed in:0:2.4.22-3.el9_3RHSA-2024:1142

haproxy-debuginfoRed Hat / RHEL

Fixed in:0:2.4.22-3.el9_3RHSA-2024:1142

Fixed in:0:2.4.22-3.el9_3RHSA-2024:1142

Fixed in:0:2.4.22-3.el9_3RHSA-2024:1142

Fixed in:0:2.4.22-3.el9_3RHSA-2024:1142

Fixed in:0:2.4.17-6.el9_2.2RHSA-2024:1089

Fixed in:0:2.4.17-6.el9_2.2RHSA-2024:1089

Fixed in:0:2.4.17-6.el9_2.2RHSA-2024:1089

Fixed in:0:2.4.17-6.el9_2.2RHSA-2024:1089

haproxy-debugsourceRocky

Fixed in:0:2.6.13-2.rhaos4.14.el8RHSA-2023:7473

Fixed in:0:2.6.13-2.rhaos4.14.el8RHSA-2023:7473

Fixed in:0:2.2.24-4.rhaos4.11.el8RHSA-2024:0308

Fixed in:0:2.2.24-4.rhaos4.11.el8RHSA-2024:0308

Fixed in:0:2.2.24-4.rhaos4.12.el8RHSA-2024:0200

Fixed in:0:2.6.13-2.rhaos4.14.el8RHSA-2023:7473

Fixed in:0:2.2.24-4.rhaos4.12.el8RHSA-2024:0200

Fixed in:0:2.2.24-4.rhaos4.11.el8RHSA-2024:0308

haproxy-debugsourceRed Hat / RHEL

Fixed in:0:2.2.24-4.rhaos4.11.el8RHSA-2024:0308

Fixed in:0:2.2.24-4.rhaos4.12.el8RHSA-2024:0200

Fixed in:0:2.6.13-2.rhaos4.14.el8RHSA-2023:7473

Fixed in:0:2.2.24-4.rhaos4.12.el8RHSA-2024:0200

Fixed in:0:2.6.13-2.rhaos4.14.el8RHSA-2023:7473

Fixed in:0:2.2.24-4.rhaos4.12.el8RHSA-2024:0200

Fixed in:0:2.2.24-4.rhaos4.13.el8RHSA-2023:7606

Fixed in:0:2.2.24-4.rhaos4.13.el8RHSA-2023:7606

haproxy22Rocky

Fixed in:0:2.2.24-4.rhaos4.13.el8RHSA-2023:7606

Fixed in:0:2.2.24-4.rhaos4.11.el8RHSA-2024:0308

Fixed in:0:2.2.24-4.rhaos4.12.el8RHSA-2024:0200

Fixed in:0:2.2.24-4.rhaos4.13.el8RHSA-2023:7606

Fixed in:0:2.2.24-4.rhaos4.13.el8RHSA-2023:7606

Fixed in:0:2.2.24-4.rhaos4.11.el8RHSA-2024:0308

Fixed in:0:2.2.24-4.rhaos4.12.el8RHSA-2024:0200

Fixed in:0:2.2.24-4.rhaos4.12.el8RHSA-2024:0200

haproxy22Red Hat / RHEL

Fixed in:0:2.2.24-4.rhaos4.13.el8RHSA-2023:7606

Fixed in:0:2.2.24-4.rhaos4.11.el8RHSA-2024:0308

Fixed in:0:2.2.24-4.rhaos4.13.el8RHSA-2023:7606

Fixed in:0:2.2.24-4.rhaos4.12.el8RHSA-2024:0200

Fixed in:0:2.2.24-4.rhaos4.11.el8RHSA-2024:0308

Fixed in:0:2.2.24-4.rhaos4.12.el8RHSA-2024:0200

Fixed in:0:2.2.24-4.rhaos4.13.el8RHSA-2023:7606

Fixed in:0:2.2.24-4.rhaos4.11.el8RHSA-2024:0308

haproxy22-debuginfoRed Hat / RHEL

Fixed in:0:2.2.24-4.rhaos4.12.el8RHSA-2024:0200

Fixed in:0:2.2.24-4.rhaos4.11.el8RHSA-2024:0308

Fixed in:0:2.2.24-4.rhaos4.13.el8RHSA-2023:7606

Fixed in:0:2.2.24-4.rhaos4.11.el8RHSA-2024:0308

Fixed in:0:2.2.24-4.rhaos4.12.el8RHSA-2024:0200

Fixed in:0:2.2.24-4.rhaos4.11.el8RHSA-2024:0308

Fixed in:0:2.2.24-4.rhaos4.13.el8RHSA-2023:7606

Fixed in:0:2.2.24-4.rhaos4.13.el8RHSA-2023:7606

haproxy22-debuginfoRocky

Fixed in:0:2.2.24-4.rhaos4.13.el8RHSA-2023:7606

Fixed in:0:2.2.24-4.rhaos4.12.el8RHSA-2024:0200

Fixed in:0:2.2.24-4.rhaos4.12.el8RHSA-2024:0200

Fixed in:0:2.2.24-4.rhaos4.12.el8RHSA-2024:0200

Fixed in:0:2.2.24-4.rhaos4.13.el8RHSA-2023:7606

Fixed in:0:2.2.24-4.rhaos4.11.el8RHSA-2024:0308

Fixed in:0:2.2.24-4.rhaos4.11.el8RHSA-2024:0308

Fixed in:0:2.2.24-4.rhaos4.11.el8RHSA-2024:0308

This vulnerability affects an unusually large number of packages. The highest-confidence fixes are shown above; the full list is longer. Check the referenced advisories for complete coverage.

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeChanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Exploit Intelligence

2.15%probability of exploitation in 30 days

81stpercentile

Elevated risk: more likely to be exploited than 81% of all known CVEs.

References

Patch1

github.com

Exploit1

github.com

Release Notes3

Technical Description1

cwe.mitre.org

Related Vulnerabilities

Other CWE-444 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-22536	Critical	10.0	98%	KEV	-
CVE-2025-61884	High	7.5	96%	KEV + Ransom	-
CVE-2020-9490	High	7.5	89%	-	Fix
CVE-2023-41265	Critical	9.6	88%	KEV + Ransom	-
CVE-2023-25690	Critical	9.8	85%	-	Fix
CVE-2022-32214	Medium	6.5	82%	-	Fix

Common questions

How do I fix CVE-2023-40225?

Published advisories record a fix for 245 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2023-40225 being actively exploited?

Not that we know of. CVE-2023-40225 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 2.1% is the estimated probability that it will be exploited in the next 30 days. That is higher than 81% of all scored CVEs.

How severe is CVE-2023-40225?

CVE-2023-40225 has a CVSS v3 base score of 7.2, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2023-40225 affect?

Published advisories record a fix for haproxy (Amazon), haproxy-debuginfo (Amazon), haproxy-debugsource (Amazon), haproxy (Debian), and 241 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-17.