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Vulnerability · Published Feb 17, 2026 · Assigned by apache

CVE-2026-24734Apache Tomcat Native, Apache Tomcat: OCSP revocation bypass

High 7.4

In plain English

A high-severity improper input validation in Apache Tomcat from Apache Software Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.4High
Exploit odds (30 days)0.6%top 52.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

Improper Input Validation vulnerability in Apache Tomcat Native, Apache Tomcat. 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. This 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. The following versions were EOL at the time the CVE was created but are known 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. 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. 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:10tomcat1:10.1.49-1.el10_2.1.alma.1ALSA-2026:19054
AlmaLinux:9tomcat1:9.0.117-1.el9_8ALSA-2026:26323
AlmaLinux:10tomcat-admin-webapps1:10.1.49-1.el10_2.1.alma.1ALSA-2026:19054
AlmaLinux:9tomcat-admin-webapps1:9.0.117-1.el9_8ALSA-2026:26323
AlmaLinux:10tomcat-docs-webapp1:10.1.49-1.el10_2.1.alma.1ALSA-2026:19054
AlmaLinux:9tomcat-docs-webapp1:9.0.117-1.el9_8ALSA-2026:26323
AlmaLinux:9tomcat-el-3.0-api1:9.0.117-1.el9_8ALSA-2026:26323
AlmaLinux:10tomcat-el-5.0-api1:10.1.49-1.el10_2.1.alma.1ALSA-2026:19054
AlmaLinux:9tomcat-jsp-2.3-api1:9.0.117-1.el9_8ALSA-2026:26323
AlmaLinux:10tomcat-jsp-3.1-api1:10.1.49-1.el10_2.1.alma.1ALSA-2026:19054
AlmaLinux:10tomcat-lib1:10.1.49-1.el10_2.1.alma.1ALSA-2026:19054
AlmaLinux:9tomcat-lib1:9.0.117-1.el9_8ALSA-2026:26323
AlmaLinux:9tomcat-servlet-4.0-api1:9.0.117-1.el9_8ALSA-2026:26323
AlmaLinux:10tomcat-servlet-6.0-api1:10.1.49-1.el10_2.1.alma.1ALSA-2026:19054
AlmaLinux:10tomcat-webapps1:10.1.49-1.el10_2.1.alma.1ALSA-2026:19054
AlmaLinux:9tomcat-webapps1:9.0.117-1.el9_8ALSA-2026:26323
AlmaLinux:10tomcat91:9.0.117-2.el10_2.alma.1ALSA-2026:36790
AlmaLinux:10tomcat91:9.0.117-1.el10_2.alma.1ALSA-2026:25341
AlmaLinux:10tomcat9-admin-webapps1:9.0.117-2.el10_2.alma.1ALSA-2026:36790
AlmaLinux:10tomcat9-admin-webapps1:9.0.117-1.el10_2.alma.1ALSA-2026:25341
AlmaLinux:10tomcat9-docs-webapp1:9.0.117-1.el10_2.alma.1ALSA-2026:25341
AlmaLinux:10tomcat9-docs-webapp1:9.0.117-2.el10_2.alma.1ALSA-2026:36790
AlmaLinux:10tomcat9-el-3.0-api1:9.0.117-2.el10_2.alma.1ALSA-2026:36790
AlmaLinux:10tomcat9-el-3.0-api1:9.0.117-1.el10_2.alma.1ALSA-2026:25341
AlmaLinux:10tomcat9-jsp-2.3-api1:9.0.117-1.el10_2.alma.1ALSA-2026:25341
AlmaLinux:10tomcat9-jsp-2.3-api1:9.0.117-2.el10_2.alma.1ALSA-2026:36790
AlmaLinux:10tomcat9-lib1:9.0.117-1.el10_2.alma.1ALSA-2026:25341
AlmaLinux:10tomcat9-lib1:9.0.117-2.el10_2.alma.1ALSA-2026:36790
AlmaLinux:10tomcat9-servlet-4.0-api1:9.0.117-2.el10_2.alma.1ALSA-2026:36790
AlmaLinux:10tomcat9-servlet-4.0-api1:9.0.117-1.el10_2.alma.1ALSA-2026:25341
AlmaLinux:10tomcat9-webapps1:9.0.117-2.el10_2.alma.1ALSA-2026:36790
AlmaLinux:10tomcat9-webapps1:9.0.117-1.el10_2.alma.1ALSA-2026:25341
Alpine:v3.23tomcat-native2.0.14-r0ALPINE-CVE-2026-24734
Alpine:v3.24tomcat-native2.0.14-r0ALPINE-CVE-2026-24734
Debian:12tomcat1010.1.52-1~deb12u1DSA-6120-1
Debian:12tomcat1010.1.52-1~deb12u1DEBIAN-CVE-2026-24734
Debian:13tomcat1010.1.52-1~deb13u1DEBIAN-CVE-2026-24734
Debian:13tomcat1010.1.52-1~deb13u1DSA-6120-1
Debian:14tomcat1010.1.52-1DEBIAN-CVE-2026-24734
Debian:13tomcat1111.0.22-1~deb13u1DEBIAN-CVE-2026-24734
Debian:14tomcat1111.0.18-1DEBIAN-CVE-2026-24734
Debian:12tomcat99.0.70-2DEBIAN-CVE-2026-24734
Debian:13tomcat99.0.70-2DEBIAN-CVE-2026-24734
Debian:14tomcat99.0.70-2DEBIAN-CVE-2026-24734
Mavenorg.apache.tomcat.embed:tomcat-embed-core10.1.52GHSA-mgp5-rv84-w37q
Mavenorg.apache.tomcat.embed:tomcat-embed-core9.0.115GHSA-mgp5-rv84-w37q
Mavenorg.apache.tomcat.embed:tomcat-embed-core11.0.18GHSA-mgp5-rv84-w37q
Mavenorg.apache.tomcat:tomcat-coyote11.0.18GHSA-mgp5-rv84-w37q
Mavenorg.apache.tomcat:tomcat-coyote10.1.52GHSA-mgp5-rv84-w37q
Mavenorg.apache.tomcat:tomcat-coyote9.0.115GHSA-mgp5-rv84-w37q
Mavenorg.apache.tomcat:tomcat-coyote-ffm9.0.115GHSA-mgp5-rv84-w37q
Mavenorg.apache.tomcat:tomcat-coyote-ffm11.0.18GHSA-mgp5-rv84-w37q
Mavenorg.apache.tomcat:tomcat-coyote-ffm10.1.52GHSA-mgp5-rv84-w37q
Rocky Linux:10tomcat1:10.1.49-1.el10_2.1RLSA-2026:19054
Rocky Linux:9tomcat1:9.0.117-1.el9_8RLSA-2026:26323
Rocky Linux:10tomcat91:9.0.117-1.el10_2RLSA-2026:25341
Ubuntu:24.04:LTStomcat10no fix listedUBUNTU-CVE-2026-24734
Ubuntu:25.10tomcat10no fix listedUBUNTU-CVE-2026-24734
Ubuntu:26.04:LTStomcat10no fix listedUBUNTU-CVE-2026-24734
Ubuntu:25.10tomcat11no fix listedUBUNTU-CVE-2026-24734
Ubuntu:25.10tomcat9no fix listedUBUNTU-CVE-2026-24734

Affected products (as reported)

VendorProductVersions
Apache Software Foundation Apache Tomcat Native 1.1.23 – through 1.1.341.2.0 – through 1.2.391.3.0 – through 1.3.42.0.0 – through 2.0.11
Apache Software Foundation Apache Tomcat 11.0.0-M1 – through 11.0.1710.1.0-M7 – through 10.1.519.0.83 – through 9.0.114

Weakness: CWE-20, CWE-295 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

References