{"id":"CVE-2026-24734","state":"PUBLISHED","title":"Apache Tomcat Native, Apache Tomcat: OCSP revocation bypass","description":"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:  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. Older 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.","publishedAt":"2026-02-17T18:53:12.228Z","updatedAt":"2026-07-15T13:48:07.714Z","severity":{"score":7.4,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","source":"CISA-ADP"},"assigner":"apache","products":["Apache Software Foundation Apache Tomcat Native","Apache Software Foundation Apache Tomcat"],"affected":[{"vendor":"Apache Software Foundation","product":"Apache Tomcat Native","defaultStatus":"unaffected","versions":[{"version":"1.1.23","status":"affected","lessThanOrEqual":"1.1.34","versionType":"semver"},{"version":"1.2.0","status":"affected","lessThanOrEqual":"1.2.39","versionType":"semver"},{"version":"1.3.0","status":"affected","lessThanOrEqual":"1.3.4","versionType":"semver"},{"version":"2.0.0","status":"affected","lessThanOrEqual":"2.0.11","versionType":"semver"}]},{"vendor":"Apache Software Foundation","product":"Apache Tomcat","defaultStatus":"unaffected","versions":[{"version":"11.0.0-M1","status":"affected","lessThanOrEqual":"11.0.17","versionType":"semver"},{"version":"10.1.0-M7","status":"affected","lessThanOrEqual":"10.1.51","versionType":"semver"},{"version":"9.0.83","status":"affected","lessThanOrEqual":"9.0.114","versionType":"semver"},{"version":"0","status":"unaffected","lessThanOrEqual":"8.5.100","versionType":"semver"}]}],"references":["https://lists.apache.org/thread/292dlmx3fz1888v6v16221kpozq56gml","https://access.redhat.com/security/cve/CVE-2026-24734","https://bugzilla.redhat.com/show_bug.cgi?id=2440426","https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-24734.json","https://access.redhat.com/errata/RHSA-2026:5611","https://access.redhat.com/errata/RHSA-2026:19054","https://access.redhat.com/errata/RHSA-2026:36790","https://access.redhat.com/errata/RHSA-2026:26323","https://access.redhat.com/errata/RHSA-2026:8334","https://access.redhat.com/errata/RHSA-2026:6569","https://access.redhat.com/errata/RHSA-2026:5612"],"weaknesses":["CWE-20","CWE-295"],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/24xxx/CVE-2026-24734.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-24734","state":"PUBLISHED","datePublished":"2026-02-17T18:53:12.228Z","dateUpdated":"2026-07-15T13:48:07.714Z","assignerShortName":"apache","assignerOrgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateReserved":"2026-01-26T14:20:56.965Z"},"containers":{"cna":{"title":"Apache Tomcat Native, Apache Tomcat: OCSP revocation bypass","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:  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. Older 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."}],"affected":[{"vendor":"Apache Software Foundation","product":"Apache Tomcat Native","defaultStatus":"unaffected","versions":[{"version":"1.1.23","status":"affected","lessThanOrEqual":"1.1.34","versionType":"semver"},{"version":"1.2.0","status":"affected","lessThanOrEqual":"1.2.39","versionType":"semver"},{"version":"1.3.0","status":"affected","lessThanOrEqual":"1.3.4","versionType":"semver"},{"version":"2.0.0","status":"affected","lessThanOrEqual":"2.0.11","versionType":"semver"}]},{"vendor":"Apache Software Foundation","product":"Apache Tomcat","defaultStatus":"unaffected","versions":[{"version":"11.0.0-M1","status":"affected","lessThanOrEqual":"11.0.17","versionType":"semver"},{"version":"10.1.0-M7","status":"affected","lessThanOrEqual":"10.1.51","versionType":"semver"},{"version":"9.0.83","status":"affected","lessThanOrEqual":"9.0.114","versionType":"semver"},{"version":"0","status":"unaffected","lessThanOrEqual":"8.5.100","versionType":"semver"}]}],"references":[{"url":"https://lists.apache.org/thread/292dlmx3fz1888v6v16221kpozq56gml","tags":["vendor-advisory"]}],"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":{"shortName":"apache","orgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateUpdated":"2026-02-17T18:53:12.228Z"},"credits":[{"lang":"en","type":"finder","value":"Joshua Rogers (@MegaManSec)"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 0.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.4,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"HIGH","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"id":"CVE-2026-24734","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-02-21T21:16:49.928042Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-03-11T15:19:30.656Z"}},{"title":"tomcat: Apache Tomcat: Certificate revocation bypass due to improper OCSP response validation","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10","packageName":"tomcat","defaultStatus":"affected","versions":[{"version":"1:10.1.49-1.el10_2.1","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10.2"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","packageName":"tomcat","defaultStatus":"affected","versions":[{"version":"1:9.0.117-1.el9_8","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:9"]},{"vendor":"Red Hat","product":"Red Hat JBoss Web Server 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