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High severity7.5NVD Advisory· Published Sep 23, 2026· Updated Sep 23, 2026

CVE-2026-77791

CVE-2026-77791

Description

Uncontrolled Resource Consumption vulnerability in Apache Tomcat during sending of WebSocket close message enabled a DoS attack.

This issue affects Apache Tomcat: from 11.0.0-M5 through 11.0.25, from 10.1.8 through 10.1.59, from 9.0.74 through 9.0.121.

The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.88 through 8.5.100. Other unsupported versions may also be affected.

Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.

Affected products

1
  • Apache/Tomcatllm-fuzzy
    Range: from 11.0.0-M5 through 11.0.25, from 10.1.8 through 10.1.59, from 9.0.74 through 9.0.121, from 8.5.88 through 8.5.100

Patches

Vulnerability mechanics

References

1

News mentions

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