Critical [CVE-2026-103119] Buffer under-read vulnerability in Apache Tomcat meant that a large non-blocking write could result in the response body being split between the current request and the next request received on that connection leading most likely to failure of the second request and possibly leakage of data from the first response to the second
This critical-severity Apache Software Foundation advisory covers CVE-2026-103119 affecting Apache Tomcat.
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Summary
Buffer under-read vulnerability in Apache Tomcat meant that a large non-blocking write could result in the response body being split between the current request and the next request received on that connection leading most likely to failure of the second request and possibly leakage of data from the first response to the second.
This issue affects Apache Tomcat: from 11.0.0-M25 through 11.0.26.
Users are recommended to upgrade to version 11.0.27, which fixes the issue.
- 11.0.0-M25 through 11.0.26.
- through 11.0.26
Official advisory · high-confidence parse· fetched 23 hours ago·verify at source
- 11.0.27
Official advisory · high-confidence parse· fetched 23 hours ago·verify at source
Mitigation checklist
- Users are recommended to upgrade to version 11.0.27, which fixes the issue.
Official advisory · high-confidence parse· fetched 23 hours ago·verify at source
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