{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2023-45648","assignerOrgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","state":"PUBLISHED","assignerShortName":"apache","dateReserved":"2023-10-10T11:31:15.664Z","datePublished":"2023-10-10T18:38:34.097Z","dateUpdated":"2025-10-29T12:00:47.484Z"},"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Apache Tomcat","vendor":"Apache Software Foundation","versions":[{"lessThanOrEqual":"11.0.0-M11","status":"affected","version":"11.0.0-M1","versionType":"semver"},{"lessThanOrEqual":"10.1.13","status":"affected","version":"10.1.0-M1","versionType":"semver"},{"lessThanOrEqual":"9.0.81","status":"affected","version":"9.0.0-M1","versionType":"semver"},{"lessThanOrEqual":"8.5.93","status":"affected","version":"8.5.0","versionType":"semver"},{"lessThan":"8.5.0","status":"unknown","version":"3","versionType":"semver"},{"lessThanOrEqual":"10.0.27","status":"unknown","version":"10.0.0-M1","versionType":"semver"}]}],"credits":[{"lang":"en","type":"finder","value":"Keran Mu and Jianjun Chen from Tsinghua University and Zhongguancun Laboratory"}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Improper Input Validation vulnerability in Apache Tomcat.<p>Tomcat&nbsp;<span style=\"background-color: rgb(255, 255, 255);\">from 11.0.0-M1 through 11.0.0-M11, from 10.1.0-M1 through 10.1.13, from 9.0.0-M1 through 9.0.81 and from 8.5.0 through 8.5.93</span> did not correctly parse HTTP trailer headers. A specially \ncrafted, invalid trailer header could cause Tomcat to treat a single \nrequest as multiple requests leading to the possibility of request \nsmuggling when behind a reverse proxy.</p><p>Older, EOL versions may also be affected.<br></p><p><span style=\"background-color: var(--wht);\">Users are recommended to upgrade to version 11.0.0-M12 onwards, 10.1.14 onwards, 9.0.81 onwards or 8.5.94 onwards, which fix the issue.</span><br></p>"}],"value":"Improper Input Validation vulnerability in Apache Tomcat.Tomcat from 11.0.0-M1 through 11.0.0-M11, from 10.1.0-M1 through 10.1.13, from 9.0.0-M1 through 9.0.81 and from 8.5.0 through 8.5.93 did not correctly parse HTTP trailer headers. A specially \ncrafted, invalid trailer header could cause Tomcat to treat a single \nrequest as multiple requests leading to the possibility of request \nsmuggling when behind a reverse proxy.\n\nOlder, EOL versions may also be affected.\n\n\nUsers are recommended to upgrade to version 11.0.0-M12 onwards, 10.1.14 onwards, 9.0.81 onwards or 8.5.94 onwards, which fix the issue."}],"metrics":[{"other":{"content":{"text":"important"},"type":"Textual description of severity"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-20","description":"CWE-20 Improper Input Validation","lang":"en","type":"CWE"}]}],"providerMetadata":{"orgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","shortName":"apache","dateUpdated":"2025-10-29T12:00:47.484Z"},"references":[{"tags":["vendor-advisory"],"url":"https://lists.apache.org/thread/2pv8yz1pyp088tsxfb7ogltk9msk0jdp"}],"source":{"discovery":"EXTERNAL"},"title":"Apache Tomcat: Trailer header parsing too lenient","x_generator":{"engine":"Vulnogram 0.1.0-dev"}},"adp":[{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-02T20:21:16.919Z"},"title":"CVE Program Container","references":[{"tags":["vendor-advisory","x_transferred"],"url":"https://lists.apache.org/thread/2pv8yz1pyp088tsxfb7ogltk9msk0jdp"},{"url":"http://www.openwall.com/lists/oss-security/2023/10/10/10","tags":["x_transferred"]},{"url":"https://www.debian.org/security/2023/dsa-5522","tags":["x_transferred"]},{"url":"https://www.debian.org/security/2023/dsa-5521","tags":["x_transferred"]},{"url":"https://lists.debian.org/debian-lts-announce/2023/10/msg00020.html","tags":["x_transferred"]},{"url":"https://security.netapp.com/advisory/ntap-20231103-0007/","tags":["x_transferred"]}]},{"affected":[{"vendor":"apache","product":"tomcat","cpes":["cpe:2.3:a:apache:tomcat:-:*:*:*:*:*:*:*"],"defaultStatus":"unknown","versions":[{"version":"11.0.0-m1","status":"affected","lessThanOrEqual":"11.0.0-m11","versionType":"semver"},{"version":"10.1.0-m1","status":"affected","lessThanOrEqual":"10.1.13","versionType":"semver"},{"version":"9.0.0-m1","status":"affected","lessThanOrEqual":"9.0.81","versionType":"semver"},{"version":"8.5.0","status":"affected","lessThanOrEqual":"8.5.93","versionType":"semver"}]}],"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.3,"attackVector":"NETWORK","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","integrityImpact":"LOW","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2025-06-16T16:59:12.136875Z","id":"CVE-2023-45648","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2025-08-21T13:49:43.621Z"}}]}}