{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-87022", "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "state": "PUBLISHED", "assignerShortName": "apache", "dateReserved": "2026-09-08T17:16:33.368Z", "datePublished": "2026-09-23T11:32:55.485Z", "dateUpdated": "2026-09-23T11:32:55.485Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache", "dateUpdated": "2026-09-23T11:32:55.485Z"}, "title": "Apache Tomcat: WebSocket message smuggling with per-message-deflate", "problemTypes": [{"descriptions": [{"description": "CWE-130 Improper handling of length parameter inconsistency", "lang": "en", "cweId": "CWE-130", "type": "CWE"}]}], "source": {"discovery": "EXTERNAL"}, "affected": [{"vendor": "Apache Software Foundation", "product": "Apache Tomcat", "versions": [{"status": "affected", "version": "11.0.0-M1", "lessThanOrEqual": "11.0.25", "versionType": "semver"}, {"status": "affected", "version": "10.1.0-M1", "lessThanOrEqual": "10.1.59", "versionType": "semver"}, {"status": "affected", "version": "9.0.0.M1", "lessThanOrEqual": "9.0.121", "versionType": "semver"}, {"status": "affected", "version": "8.5.0", "lessThanOrEqual": "8.5.100", "versionType": "semver"}, {"status": "affected", "version": "7.0.56", "lessThanOrEqual": "7.0.109", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"value": "Improper handling of length parameter inconsistency vulnerability in Apache Tomcat allows WebSocket message smuggling when per-message-deflate is used.\n\n\n\nThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M1 through 9.0.121.\n\n\n\nThe following versions were EOS at the time the CVE was created but are known to be affected:\u00a0from 8.5.0 through 8.5.100, from 7.0.56 through 7.0.109.\u00a0Other unsupported versions may also be affected.\n\n\n\nUsers are recommended to upgrade to version 11.0.26, 10.1.60 or 9.1.22, which fix the issue.", "lang": "en", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Improper handling of length parameter inconsistency vulnerability in Apache Tomcat allows WebSocket message smuggling when per-message-deflate is used.</p><p>This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M1 through 9.0.121.</p><p><span>The following versions were EOS at the time the CVE was created but are known to be affected:</span><span>&nbsp;</span>from 8.5.0 through 8.5.100, from 7.0.56 through 7.0.109.&nbsp;<span>Other unsupported versions may also be affected.</span></p><p>Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.1.22, which fix the issue.</p>"}]}], "references": [{"url": "https://lists.apache.org/thread/ypvlkjqsq0480fnk9jm6h9qllddwlw4w", "tags": ["vendor-advisory"]}], "metrics": [{"other": {"type": "Textual description of severity", "content": {"text": "low"}}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "credits": [{"lang": "en", "value": "krsecurity(kongr)", "type": "finder"}], "x_generator": {"engine": "Vulnogram 1.0.3"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Apache Tomcat", "vendor": "Apache Software Foundation", "versions": [{"lessThanOrEqual": "11.0.25", "status": "affected", "version": "11.0.0-M1", "versionType": "semver"}, {"lessThanOrEqual": "10.1.59", "status": "affected", "version": "10.1.0-M1", "versionType": "semver"}, {"lessThanOrEqual": "9.0.121", "status": "affected", "version": "9.0.0.M1", "versionType": "semver"}, {"lessThanOrEqual": "8.5.100", "status": "affected", "version": "8.5.0", "versionType": "semver"}, {"lessThanOrEqual": "7.0.109", "status": "affected", "version": "7.0.56", "versionType": "semver"}]}], "source": "security@apache.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper handling of length parameter inconsistency vulnerability in Apache Tomcat allows WebSocket message smuggling when per-message-deflate is used.\n\n\n\nThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M1 through 9.0.121.\n\n\n\nThe following versions were EOS at the time the CVE was created but are known to be affected:\u00a0from 8.5.0 through 8.5.100, from 7.0.56 through 7.0.109.\u00a0Other unsupported versions may also be affected.\n\n\n\nUsers are recommended to upgrade to version 11.0.26, 10.1.60 or 9.1.22, which fix the issue."}], "id": "CVE-2026-87022", "lastModified": "2026-09-23T12:17:08.640", "metrics": {}, "published": "2026-09-23T12:17:08.640", "references": [{"source": "security@apache.org", "url": "https://lists.apache.org/thread/ypvlkjqsq0480fnk9jm6h9qllddwlw4w"}], "sourceIdentifier": "security@apache.org", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-130"}], "source": "security@apache.org", "type": "Primary"}]}

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