CVE-2026-77762

{"id": "CVE-2026-77762", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-77762", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-09-23T15:40:01.556894Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.2}]}, "affected": [{"source": "security@apache.org", "affectedData": [{"vendor": "Apache Software Foundation", "product": "Apache Tomcat", "versions": [{"status": "affected", "version": "11.0.0-M1", "versionType": "semver", "lessThanOrEqual": "11.0.25"}, {"status": "affected", "version": "10.1.0-M1", "versionType": "semver", "lessThanOrEqual": "10.1.59"}, {"status": "affected", "version": "9.0.39", "versionType": "semver", "lessThanOrEqual": "9.0.121"}, {"status": "affected", "version": "8.5.59", "versionType": "semver", "lessThanOrEqual": "8.5.100"}, {"status": "unaffected", "version": "0", "versionType": "semver", "lessThanOrEqual": "7.0.109"}], "defaultStatus": "unaffected"}]}], "published": "2026-09-23T12:17:06.800", "references": [{"url": "https://lists.apache.org/thread/y5r9fvjo7ol24mkoyoc0st8bqrfyqcyn", "source": "security@apache.org"}, {"url": "http://www.openwall.com/lists/oss-security/2026/09/23/23", "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "security@apache.org", "description": [{"lang": "en", "value": "CWE-362"}]}], "descriptions": [{"lang": "en", "value": "Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') vulnerability in Apache Tomcat allows an attacker to inject trailer fields into another HTTP/2 request.\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 9.0.39 through 9.0.121.\n\n\n\nThe following versions were EOL at the time the CVE was created but are \nknown to be affected: from 8.5.59 through 8.5.100. Other unsupported versions may also be affected.\n\n\n\n\nUsers are recommended to upgrade to version 11.0.26, 10.1.60, 9.0.122, which fix\u00a0the issue."}], "lastModified": "2026-09-30T15:22:35.070", "sourceIdentifier": "security@apache.org"}