https://vulnerability.circl.lu/rss/recent/all/10 Most recent entries from all 2026-10-01T10:05:06.535107+00:00 Vulnerability-Lookup info@circl.lu python-feedgen Contains only the most 10 recent entries. https://vulnerability.circl.lu/vuln/cve-2021-43980 CVE-2021-43980 — Apache Tomcat: Information disclosure 2026-10-01T10:05:06.576537+00:00

Affected: Apache Software Foundation Apache Tomcat

The simplified implementation of blocking reads and writes introduced in Tomcat 10 and back-ported to Tomcat 9.0.47 onwards exposed a long standing (but extremely hard to trigger) concurrency bug in Apache Tomcat 10.1.0 to 10.1.0-M12, 10.0.0-M1 to 10.0.18, 9.0.0-M1 to 9.0.60 and 8.5.0 to 8.5.77 that could cause client connections to share an Http11Processor instance resulting in responses, or part responses, to be received by the wrong client.