{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-24734", "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "state": "PUBLISHED", "assignerShortName": "apache", "dateReserved": "2026-01-26T14:20:56.965Z", "datePublished": "2026-02-17T18:53:12.228Z", "dateUpdated": "2026-02-17T18:53:12.228Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "Apache Tomcat Native", "vendor": "Apache Software Foundation", "versions": [{"lessThanOrEqual": "1.1.34", "status": "affected", "version": "1.1.23", "versionType": "semver"}, {"lessThanOrEqual": "1.2.39", "status": "affected", "version": "1.2.0", "versionType": "semver"}, {"lessThanOrEqual": "1.3.4", "status": "affected", "version": "1.3.0", "versionType": "semver"}, {"lessThanOrEqual": "2.0.11", "status": "affected", "version": "2.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "Apache Tomcat", "vendor": "Apache Software Foundation", "versions": [{"lessThanOrEqual": "11.0.17", "status": "affected", "version": "11.0.0-M1", "versionType": "semver"}, {"lessThanOrEqual": "10.1.51", "status": "affected", "version": "10.1.0-M7", "versionType": "semver"}, {"lessThanOrEqual": "9.0.114", "status": "affected", "version": "9.0.83", "versionType": "semver"}, {"lessThanOrEqual": "8.5.100", "status": "unaffected", "version": "0", "versionType": "semver"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Joshua Rogers (@MegaManSec)"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Improper Input Validation vulnerability in Apache Tomcat Native, Apache Tomcat.</p><p>When using an OCSP responder, Tomcat Native (and Tomcat's FFM port of the Tomcat Native code) did not complete verification or freshness checks on the OCSP response which could allow certificate revocation to be bypassed.</p><p>This issue affects Apache Tomcat Native:&nbsp; from 1.3.0 through 1.3.4, from 2.0.0 through 2.0.11; Apache Tomcat: from 11.0.0-M1 through 11.0.17, from 10.1.0-M7 through 10.1.51, from 9.0.83 through 9.0.114.<br></p><p>The following versions were EOL at the time the CVE was created but are \nknown to be affected: <span style=\"background-color: rgb(255, 255, 255);\">from 1.1.23 through 1.1.34, from 1.2.0 through 1.2.39.&nbsp;Older EOL versions are not affected.</span></p><p>Apache Tomcat Native users are recommended to upgrade to versions 1.3.5 or later or 2.0.12 or later, which fix the issue.</p>Apache Tomcat users are recommended to upgrade to versions 11.0.18 or later, 10.1.52 or later or 9.0.115 or later which fix the issue.<br>"}], "value": "Improper Input Validation vulnerability in Apache Tomcat Native, Apache Tomcat.\n\nWhen using an OCSP responder, Tomcat Native (and Tomcat's FFM port of the Tomcat Native code) did not complete verification or freshness checks on the OCSP response which could allow certificate revocation to be bypassed.\n\nThis issue affects Apache Tomcat Native:\u00a0 from 1.3.0 through 1.3.4, from 2.0.0 through 2.0.11; Apache Tomcat: from 11.0.0-M1 through 11.0.17, from 10.1.0-M7 through 10.1.51, from 9.0.83 through 9.0.114.\n\n\nThe following versions were EOL at the time the CVE was created but are \nknown to be affected: from 1.1.23 through 1.1.34, from 1.2.0 through 1.2.39.\u00a0Older EOL versions are not affected.\n\nApache Tomcat Native users are recommended to upgrade to versions 1.3.5 or later or 2.0.12 or later, which fix the issue.\n\nApache Tomcat users are recommended to upgrade to versions 11.0.18 or later, 10.1.52 or later or 9.0.115 or later which fix the issue."}], "metrics": [{"other": {"content": {"text": "moderate"}, "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": "2026-02-17T18:53:12.228Z"}, "references": [{"tags": ["vendor-advisory"], "url": "https://lists.apache.org/thread/292dlmx3fz1888v6v16221kpozq56gml"}], "source": {"discovery": "EXTERNAL"}, "title": "Apache Tomcat Native, Apache Tomcat: OCSP revocation bypass", "x_generator": {"engine": "Vulnogram 0.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Improper Input Validation vulnerability in Apache Tomcat Native, Apache Tomcat.\n\nWhen using an OCSP responder, Tomcat Native (and Tomcat's FFM port of the Tomcat Native code) did not complete verification or freshness checks on the OCSP response which could allow certificate revocation to be bypassed.\n\nThis issue affects Apache Tomcat Native:\u00a0 from 1.3.0 through 1.3.4, from 2.0.0 through 2.0.11; Apache Tomcat: from 11.0.0-M1 through 11.0.17, from 10.1.0-M7 through 10.1.51, from 9.0.83 through 9.0.114.\n\n\nThe following versions were EOL at the time the CVE was created but are \nknown to be affected: from 1.1.23 through 1.1.34, from 1.2.0 through 1.2.39.\u00a0Older EOL versions are not affected.\n\nApache Tomcat Native users are recommended to upgrade to versions 1.3.5 or later or 2.0.12 or later, which fix the issue.\n\nApache Tomcat users are recommended to upgrade to versions 11.0.18 or later, 10.1.52 or later or 9.0.115 or later which fix the issue."}, {"lang": "es", "value": "Vulnerabilidad de validaci\u00f3n de entrada incorrecta en Apache Tomcat Native, Apache Tomcat.\n\nAl usar un respondedor OCSP, Tomcat Native (y el puerto FFM de Tomcat del c\u00f3digo de Tomcat Native) no complet\u00f3 las verificaciones de verificaci\u00f3n o frescura en la respuesta OCSP, lo que podr\u00eda permitir que se eluda la revocaci\u00f3n del certificado.\n\nEste problema afecta a Apache Tomcat Native: de 1.3.0 a 1.3.4, de 2.0.0 a 2.0.11; Apache Tomcat: de 11.0.0-M1 a 11.0.17, de 10.1.0-M7 a 10.1.51, de 9.0.83 a 9.0.114.\n\nLas siguientes versiones estaban al final de su vida \u00fatil (EOL) en el momento en que se cre\u00f3 el CVE, pero se sabe que est\u00e1n afectadas: de 1.1.23 a 1.1.34, de 1.2.0 a 1.2.39. Las versiones EOL m\u00e1s antiguas no est\u00e1n afectadas.\n\nSe recomienda a los usuarios de Apache Tomcat Native que actualicen a las versiones 1.3.5 o posteriores o 2.0.12 o posteriores, que solucionan el problema.\n\nSe recomienda a los usuarios de Apache Tomcat que actualicen a las versiones 11.0.18 o posteriores, 10.1.52 o posteriores o 9.0.115 o posteriores que solucionan el problema."}], "id": "CVE-2026-24734", "lastModified": "2026-02-18T17:51:53.510", "metrics": {}, "published": "2026-02-17T19:21:56.953", "references": [{"source": "security@apache.org", "url": "https://lists.apache.org/thread/292dlmx3fz1888v6v16221kpozq56gml"}], "sourceIdentifier": "security@apache.org", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}], "source": "security@apache.org", "type": "Primary"}]}

{"bugzilla": {"description": "tomcat: Apache Tomcat: Certificate revocation bypass due to improper OCSP response validation", "id": "2440426", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2440426"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.4", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N", "status": "draft"}, "cwe": "CWE-295", "details": ["Improper Input Validation vulnerability in Apache Tomcat Native, Apache Tomcat.\nWhen using an OCSP responder, Tomcat Native (and Tomcat's FFM port of the Tomcat Native code) did not complete verification or freshness checks on the OCSP response which could allow certificate revocation to be bypassed.\nThis issue affects Apache Tomcat Native:\u00a0 from 1.3.0 through 1.3.4, from 2.0.0 through 2.0.11; Apache Tomcat: from 11.0.0-M1 through 11.0.17, from 10.1.0-M7 through 10.1.51, from 9.0.83 through 9.0.114.\nThe following versions were EOL at the time the CVE was created but are \nknown to be affected: from 1.1.23 through 1.1.34, from 1.2.0 through 1.2.39.\u00a0Older EOL versions are not affected.\nApache Tomcat Native users are recommended to upgrade to versions 1.3.5 or later or 2.0.12 or later, which fix the issue.\nApache Tomcat users are recommended to upgrade to versions 11.0.18 or later, 10.1.52 or later or 9.0.115 or later which fix the issue.", "A flaw was found in Apache Tomcat. When an Online Certificate Status Protocol (OCSP) responder is used, the Tomcat Native component, and Tomcat's FFM port of the Tomcat Native code, does not properly verify or check the freshness of the OCSP response. This improper input validation vulnerability could allow an attacker to bypass certificate revocation checks, potentially leading to the acceptance of revoked certificates."], "name": "CVE-2026-24734", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "tomcat", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "tomcat9", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "tomcat6", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "tomcat", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "pki-deps:10.6/pki-servlet-engine", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "tomcat", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "pki-servlet-engine", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "tomcat", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-02-17T18:53:12Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-24734\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-24734\nhttps://lists.apache.org/thread/292dlmx3fz1888v6v16221kpozq56gml"], "threat_severity": "Important"}