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Urgent Upgrade Needed: Tomcat Coyote Vulnerability Exposed

7/19/2025

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Summary

Story summary

A critical vulnerability has been discovered in the Tomcat Coyote module, impacting versions 9.0.0-M1 to 11.0.8. This flaw poses a risk for denial-of-service attacks through HTTP/2 stream limits. Users are urged to upgrade to versions 9.0.107, 10.1.43, or 11.0.9 to safeguard their systems, as no active attacks have been reported yet.

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Story summary

A critical vulnerability has been discovered in the Tomcat Coyote module, impacting versions 9.0.0-M1 to 11.0.8. This flaw poses a risk for denial-of-service attacks through HTTP/2 stream limits. Users are urged to upgrade to versions 9.0.107, 10.1.43, or 11.0.9 to safeguard their systems, as no active attacks have been reported yet.