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CVE-2026-77762 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') vulnerability in Apache…

Description

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') vulnerability in Apache Tomcat allows an attacker to inject trailer fields into another HTTP/2 request. 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. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.59 through 8.5.100. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60, 9.0.122, which fix the issue.

Affected products and versions

Product Affected versions Fixed in
Apache Tomcat 11.0 11.0.0-M1 → 11.0.25 No fix stated
Apache Tomcat 10.1 10.1.0-M1 → 10.1.59 No fix stated
Apache Tomcat 9.0 9.0.39 → 9.0.121 No fix stated
Apache Tomcat 8.5 8.5.59 → 8.5.100 No fix stated

References

Timeline

  1. Published
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