All vulnerabilities

Servers and applications

CVE-2021-39241

An issue was discovered in HAProxy 2.0 before 2.0.24, 2.2 before 2.2.16, 2.3 before 2.3.13, and 2.4 before 2.4.3. An HTTP method name may contain a space followed by the name of a protected resource. It is possible that a server would interpret this as a request for that protected resource, such as in the "GET /admin? HTTP/1.1 /static/images HTTP/1.1" example.

Severity
Medium 5.3
Published
17 Aug 2021
Last changed
17 Jun 2026
Added to UpHeron
21 Oct 2026
Fixed in
2.0.24, 2.2.16, 2.3.13, 2.4.3
Sources
NVD

Affected software

SoftwareAffected versions
HAProxyServers and applications · cpe:a:haproxy:haproxy
  • From 2.0.0 before 2.0.24
  • From 2.2.0 before 2.2.16
  • From 2.3.0 before 2.3.13
  • From 2.4.0 before 2.4.3

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-39241
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-39241