{"id":"CVE-2021-25122","revision":"d08058562ee548a4bbcb744c01a34223","records":[{"revision":"d08058562ee548a4bbcb744c01a34223","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2021-25122","aliases":[],"title":"Apache Tomcat h2c request mix-up","description":"When responding to new h2c connection requests, Apache Tomcat versions 10.0.0-M1 to 10.0.0, 9.0.0.M1 to 9.0.41 and 8.5.0 to 8.5.61 could duplicate request headers and a limited amount of request body from one request to another meaning user A and user B could both see the results of user A's request.","state":0,"publishedAt":"2021-03-01T12:00:20+00:00","modifiedAt":"2026-10-08T21:13:48.044+00:00","affected":[{"ecosystem":"Vendor product","name":"Apache Tomcat","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Apache Tomcat\",\n                    \"vendor\": \"Apache Software Foundation\",\n                    \"versions\": [\n                        {\n                            \"lessThan\": \"10.0.2\",\n                            \"status\": \"affected\",\n                            \"version\": \"Apache Tomcat 10\",\n                            \"versionType\": \"custom\"\n                        },\n                        {\n                            \"lessThan\": \"9.0.42\",\n                            \"status\": \"affected\",\n                            \"version\": \"Apache Tomcat 9\",\n                            \"versionType\": \"custom\"\n                        },\n                        {\n                            \"lessThan\": \"8.5.62\",\n                            \"status\": \"affected\",\n                            \"version\": \"Apache Tomcat 8.5\",\n                            \"versionType\": \"custom\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://lists.apache.org/thread.html/r7b95bc248603360501f18c8eb03bb6001ec0ee3296205b34b07105b7%40%3Cannounce.tomcat.apache.org%3E","https://lists.apache.org/thread.html/r7b95bc248603360501f18c8eb03bb6001ec0ee3296205b34b07105b7%40%3Cusers.tomcat.apache.org%3E","https://lists.apache.org/thread.html/r7b95bc248603360501f18c8eb03bb6001ec0ee3296205b34b07105b7%40%3Cdev.tomcat.apache.org%3E","https://lists.apache.org/thread.html/rf6d5d57b114678d8898005faef31e9fd6d7c981fcc4ccfc3bc272fc9%40%3Cdev.tomcat.apache.org%3E","https://lists.apache.org/thread.html/r7b95bc248603360501f18c8eb03bb6001ec0ee3296205b34b07105b7%40%3Cannounce.apache.org%3E","http://www.openwall.com/lists/oss-security/2021/03/01/1","https://lists.apache.org/thread.html/rcd90bf36b1877e1310b87ecd14ed7bbb15da52b297efd9f0e7253a3b%40%3Cusers.tomcat.apache.org%3E","https://lists.apache.org/thread.html/rd0463f9a5cbc02a485404c4b990f0da452e5ac5c237808edba11c947%40%3Cusers.tomcat.apache.org%3E","https://lists.debian.org/debian-lts-announce/2021/03/msg00018.html","https://www.debian.org/security/2021/dsa-4891","https://www.oracle.com//security-alerts/cpujul2021.html","https://security.netapp.com/advisory/ntap-20210409-0002/","https://www.oracle.com/security-alerts/cpuoct2021.html","https://www.oracle.com/security-alerts/cpujan2022.html","https://security.gentoo.org/glsa/202208-34"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2021-25122","license":"CVE Program Terms of Use","key":"cve-program:CVE-2021-25122","identifiers":["CVE-2021-25122"]},"retained":false,"historicalAffected":[]}],"coverage":[]}