CVE-2026-77762
Severity CVSS v4.0:
Pending analysis
Type:
CWE-362
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Publication date:
23/09/2026
Last modified:
23/09/2026
Description
Concurrent Execution using Shared Resource with Improper Synchronization (&#39;Race Condition&#39;) vulnerability in Apache Tomcat allows an attacker to inject trailer fields into another HTTP/2 request.<br />
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This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.39 through 9.0.121.<br />
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The following versions were EOL at the time the CVE was created but are <br />
known to be affected: from 8.5.59 through 8.5.100. Other unsupported versions may also be affected.<br />
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Users are recommended to upgrade to version 11.0.26, 10.1.60, 9.0.122, which fix the issue.
Impact
Base Score 3.x
8.10
Severity 3.x
HIGH