CVE-2023-40225
highpriority · track · 30EPSS 0.021 · 82 %ileDEEURUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.6–7.2
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (28)
Products and version ranges known to be affected.
advisories (3)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2023-2041HAProxy Enterprise: Schwachstelle ermöglicht Darstellen falscher InformationenDeutsch2023-08-10csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in HAProxy Enterprise ausnutzen, um falsche Informationen darzustellen.
- WID-SEC-W-2024-0054IBM Security Verify Access: Mehrere SchwachstellenDeutsch2024-01-09csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in IBM Security Verify Access ausnutzen, um beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, einen Denial-of-Service-Zustand herbeizuführen, vertrauliche Informationen offenzulegen, seine Privilegien zu erweitern oder komplexe Angriffe wie Cache Poisoning, Cross-Site-Scripting oder Session-Hijacking durchzuführen.
- BIT-haproxy-2023-402252024-03-06vendor · osvUS
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.
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (25)
External citations — patches, advisories, analysis.
- https://cwe.mitre.org/data/definitions/436.htmlcnnvd
- https://cxsecurity.com/cveshow/CVE-2023-40225/cnnvd
- https://github.com/haproxy/haproxy/commit/6492f1f29d738457ea9f382aca54537f35f9d856cnnvd
- https://github.com/haproxy/haproxy/issues/2237cnnvd
- https://packetstormsecurity.com/files/176594/Red-Hat-Security-Advisory-2024-0200-03.htmlcnnvd
- https://www.auscert.org.au/bulletins/ESB-2023.4740cnnvd
- https://www.auscert.org.au/bulletins/ESB-2023.4766cnnvd
- https://www.auscert.org.au/bulletins/ESB-2023.4917cnnvd
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