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Servers and applications

CVE-2020-17527

While investigating bug 64830 it was discovered that Apache Tomcat 10.0.0-M1 to 10.0.0-M9, 9.0.0-M1 to 9.0.39 and 8.5.0 to 8.5.59 could re-use an HTTP request header value from the previous stream received on an HTTP/2 connection for the request associated with the subsequent stream. While this would most likely lead to an error and the closure of the HTTP/2 connection, it is possible that…

Severity
High 7.5
Published
3 Dec 2020
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
  • Version 10.0.0-milestone9
  • Version 10.0.0-milestone8
  • Version 10.0.0-milestone7
  • Version 10.0.0-milestone6
All 40 release lines
  • From 8.5.1 up to 8.5.59
  • Version 9.0.0-milestone5
  • Version 9.0.0-milestone6
  • Version 9.0.0-milestone7
  • Version 9.0.0-milestone8
  • Version 9.0.0-milestone9
  • Version 9.0.0-milestone10
  • Version 9.0.0-milestone11
  • Version 9.0.0-milestone12
  • Version 9.0.0-milestone13
  • Version 9.0.0-milestone14
  • Version 9.0.0-milestone15
  • Version 9.0.0-milestone16
  • Version 9.0.0-milestone17
  • Version 9.0.0-milestone18
  • Version 9.0.0-milestone19
  • Version 9.0.0-milestone20
  • Version 9.0.0-milestone21
  • Version 9.0.0-milestone22
  • Version 9.0.0-milestone23
  • Version 9.0.0-milestone24
  • Version 9.0.0-milestone25
  • Version 9.0.0-milestone26
  • Version 9.0.0-milestone27
  • From 9.0.1 up to 9.0.35
  • Version 9.0.35-3.39.1
  • Version 9.0.35-3.57.3
  • Version 9.0.36
  • Version 9.0.37
  • Version 9.0.38
  • Version 9.0.39
  • Version 10.0.0-milestone1
  • Version 10.0.0-milestone2
  • Version 10.0.0-milestone3
  • Version 10.0.0-milestone4
  • Version 10.0.0-milestone5
  • Version 10.0.0-milestone6
  • Version 10.0.0-milestone7
  • Version 10.0.0-milestone8
  • Version 10.0.0-milestone9

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2020-17527
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2020-17527