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Important: tomcat9 security update

Type: advisorySource: OSV1 source record

Tomcat is the servlet container that is used in the official Reference Implementation for the Java Servlet and JavaServer Pages technologies. The Java Servlet and JavaServer Pages specifications are developed by Sun under the Java Community Process. Tomcat is developed in an open and participatory environment and released under the Apache Software License version 2.0. Tomcat is intended to be a collaboration of the best-of-breed developers from around the world. Security Fix(es): * tomcat: Apache Tomcat: Certificate revocation bypass due to improper OCSP response validation (CVE-2026-24734) * tomcat: Client certificate verification bypass due to virtual host mapping (CVE-2025-66614) * tomcat: security constraint bypass with HTTP/0.9 (CVE-2026-24733) * Apache Tomcat: Apache Tomcat: Authentication bypass due to CLIENT_CERT soft fail misconfiguration (CVE-2026-29145) * Apache Tomcat: Apache Tomcat: Information disclosure via sensitive data in log files (CVE-2026-34487) * Apache Tomcat: Apache Tomcat: Open Redirect vulnerability via LoadBalancerDrainingValve (CVE-2026-25854) * Apache Tomcat: Apache Tomcat: HTTP Request/Response Smuggling via invalid chunk extension (CVE-2026-24880) * Apache Tomcat: Apache Tomcat: Authentication bypass via client certificate misconfiguration (CVE-2026-34500) * Apache Tomcat: Apache Tomcat: Information disclosure due to improper encoding in JsonAccessLogValve (CVE-2026-34483) For more details about the security issue(s), including the impact, a CVS

Announced Source revision 1
Original source ↗

RLSA-2026:25341

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:RLSA-2026:25341

tomcat9

Source reference: /affected/0/package/name

Affected versions
Not stated in this record
Fixed versions
1:9.0.117-1.el10_2

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1:9.0.117-1.el10_2"
          }
        ],
        "database_specific": {
          "yum_repository": "AppStream"
        }
      }
    ],
    "package": {
      "name": "tomcat9",
      "purl": "pkg:rpm/rocky-linux/tomcat9?distro=rocky-linux-10-aarch64&epoch=1",
      "ecosystem": "Rocky Linux:10"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/resf-osv-data/RLSA-2026:25341.json"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#21242 · Revision 1
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Publisher date
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