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Servers and applications

CVE-2021-33037

Apache Tomcat 10.0.0-M1 to 10.0.6, 9.0.0.M1 to 9.0.46 and 8.5.0 to 8.5.66 did not correctly parse the HTTP transfer-encoding request header in some circumstances leading to the possibility to request smuggling when used with a reverse proxy. Specifically: - Tomcat incorrectly ignored the transfer encoding header if the client declared it would only accept an HTTP/1.0 response; - Tomcat honoured…

Severity
Medium 5.3
Published
12 Jul 2021
Last changed
8 Oct 2026
Added to UpHeron
21 Oct 2026
Sources
NVD

Affected software

SoftwareAffected versions
Apache TomcatServers and applications · cpe:a:apache:tomcat
  • From 8.5.0 up to 8.5.66
  • After 9.0.0 up to 9.0.46
  • After 10.0.0 up to 10.0.6

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-33037
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-33037