All vulnerabilities

Servers and applications

CVE-2019-18277

A flaw was found in HAProxy before 2.0.6. In legacy mode, messages featuring a transfer-encoding header missing the "chunked" value were not being correctly rejected. The impact was limited but if combined with the "http-reuse always" setting, it could be used to help construct an HTTP request smuggling attack against a vulnerable component employing a lenient parser that would ignore the…

Severity
High 7.5
Published
23 Oct 2019
Last changed
17 Jun 2026
Added to UpHeron
21 Oct 2026
Fixed in
2.0.6
Sources
NVD

Affected software

SoftwareAffected versions
HAProxyServers and applications · cpe:a:haproxy:haproxy
  • Every version before 2.0.6

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2019-18277
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2019-18277