UpHeron
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Servers and applications

CVE-2026-65927

Off-by-one Error vulnerability in Apache Tomcat impacting the [N] flag on the rewrite valves causes rewrite processing to restart at the second rule rather than the first rule. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120. The following versions were EOL at the time the CVE was created but are known to be…

Severity
High 7.5
Published
25 Aug 2026
Last changed
27 Aug 2026
Added to UpHeron
21 Oct 2026
Fixed in
9.0.121, 10.1.58, 11.0.25
Sources
NVD

Affected software

SoftwareAffected versions
Apache TomcatServers and applications · cpe:a:apache:tomcat
  • From 8.5.0 before 9.0.121
  • From 10.1.0 before 10.1.58
  • From 11.0.0 before 11.0.25

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-65927
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-65927