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Fencer Vulns
high 7.4

CVE-2026-24734 json

Apache Tomcat Native, Apache Tomcat: OCSP revocation bypass

published 2026-02-17 8 mo ago modified 2026-11-04 5 d ago also BIT-tomcat-2026-24734 , EUVD-2026-7833 , GHSA-mgp5-rv84-w37q

cvss
7.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 47%
public exploits
0
none known

Summary

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.

Patch / fix

  • maven org.apache.tomcat:tomcat-coyote 9.0.115, 10.1.52, 11.0.18
  • maven org.apache.tomcat.embed:tomcat-embed-core 9.0.115, 10.1.52, 11.0.18
  • maven org.apache.tomcat:tomcat-coyote-ffm 9.0.115, 10.1.52, 11.0.18
  • bitnami tomcat 9.0.115, 10.1.52, 11.0.18
  • Red Hat Red Hat Enterprise Linux 10 1:10.1.49-1.el10_2.1
  • Red Hat Red Hat Enterprise Linux 9 1:9.0.117-1.el9_8
  • Red Hat Red Hat JBoss Web Server 6.2 on RHEL 10 0:1.3.6-1.redhat_1.el10jws, 0:10.1.49-9.redhat_00007.1.el10jws
  • Red Hat Red Hat JBoss Web Server 6.2 on RHEL 8 0:1.3.6-1.redhat_1.el8jws, 0:10.1.49-9.redhat_00007.1.el8jws
  • Red Hat Red Hat JBoss Web Server 6.2 on RHEL 9 0:1.3.6-1.redhat_1.el9jws, 0:10.1.49-9.redhat_00007.1.el9jws
  • Red Hat Red Hat Hardened Images 10.1.54-1.hum1, 11.0.21-0.1.hum1
  • tomcat9 Debian 14, Debian 13, Debian 12 9.0.70-2
  • tomcat10 Debian 12 10.1.52-1~deb12u1
  • tomcat10 Debian 13 10.1.52-1~deb13u1
  • tomcat10 Debian 14 10.1.52-1
  • tomcat11 Debian 13 11.0.22-1~deb13u1
  • tomcat11 Debian 14 11.0.18-1

debian advisories DEBIAN-CVE-2026-24734

  • tomcat RHEL 9 1:9.0.117-1.el9_8
  • tomcat-lib RHEL 9 1:9.0.117-1.el9_8
  • tomcat-webapps RHEL 9 1:9.0.117-1.el9_8
  • tomcat-el-3.0-api RHEL 9 1:9.0.117-1.el9_8
  • tomcat-docs-webapp RHEL 9 1:9.0.117-1.el9_8
  • tomcat-jsp-2.3-api RHEL 9 1:9.0.117-1.el9_8
  • tomcat-admin-webapps RHEL 9 1:9.0.117-1.el9_8
  • tomcat-servlet-4.0-api RHEL 9 1:9.0.117-1.el9_8

red hat advisories RHSA-2026:26323RHSA-2026:19054RHSA-2026:8334RHSA-2026:6569RHSA-2026:5611

  • tomcat10 SLES for SAP applications 16.0, SLES 16.0 10.1.52-160000.1.1
  • tomcat11 SLES for SAP applications 16.0, SLES 16.0 11.0.18-160000.1.1
  • tomcat SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +9 more 9.0.115-150200.102.1
  • tomcat10 SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES 15 SP6-LTSS +5 more 10.1.52-150200.5.61.1
  • tomcat11 SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Web and Scripting 15 SP7 +1 more 11.0.18-150600.13.15.1

suse advisories SUSE-SU-2026:20982-1SUSE-SU-2026:20926-1SUSE-SU-2026:0932-1SUSE-SU-2026:0890-1SUSE-SU-2026:0877-1

  • tomcat10 openSUSE Leap 16.0 10.1.52-160000.1.1
  • tomcat11 openSUSE Leap 16.0 11.0.18-160000.1.1
  • tomcat openSUSE Leap 16.0 9.0.115-160000.1.1
  • tomcat openSUSE Tumbleweed 9.0.115-1.1
  • tomcat10 openSUSE Tumbleweed 10.1.52-1.1
  • tomcat11 openSUSE Tumbleweed 11.0.18-1.1

opensuse advisories openSUSE-SU-2026:20444-1openSUSE-SU-2026:20414-1openSUSE-SU-2026:20350-1openSUSE-SU-2026:10305-1openSUSE-SU-2026:10306-1openSUSE-SU-2026:10307-1

  • tomcat9 AlmaLinux 10 1:9.0.117-2.el10_2.alma.1
  • tomcat9-lib AlmaLinux 10 1:9.0.117-2.el10_2.alma.1
  • tomcat9-webapps AlmaLinux 10 1:9.0.117-2.el10_2.alma.1
  • tomcat9-el-3.0-api AlmaLinux 10 1:9.0.117-2.el10_2.alma.1
  • tomcat9-docs-webapp AlmaLinux 10 1:9.0.117-2.el10_2.alma.1
  • tomcat9-jsp-2.3-api AlmaLinux 10 1:9.0.117-2.el10_2.alma.1
  • tomcat9-admin-webapps AlmaLinux 10 1:9.0.117-2.el10_2.alma.1
  • tomcat9-servlet-4.0-api AlmaLinux 10 1:9.0.117-2.el10_2.alma.1

almalinux advisories ALSA-2026:36790ALSA-2026:26323ALSA-2026:25341ALSA-2026:19054

  • tomcat9 Rocky Linux 10 1:9.0.117-1.el10_2
  • tomcat Rocky Linux 9 1:9.0.117-1.el9_8
  • tomcat Rocky Linux 10 1:10.1.49-1.el10_2.1

rocky linux advisories RLSA-2026:25341RLSA-2026:26323RLSA-2026:19054

  • tomcat-native Alpine 3.24, Alpine 3.23 2.0.14-r0

alpine advisories ALPINE-CVE-2026-24734

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-24734 updated cvss 7.4

tomcat: Apache Tomcat: Certificate revocation bypass due to improper OCSP response validation

  • Red Hat JBoss Web Server 5 tomcat
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux AppStream (v. 9) tomcat 9.0.117-1.el9_8, tomcat-lib 9.0.117-1.el9_8, tomcat-webapps 9.0.117-1.el9_8, tomcat-el-3.0-api 9.0.117-1.el9_8, tomcat-docs-webapp 9.0.117-1.el9_8, tomcat-jsp-2.3-api 9.0.117-1.el9_8, +2 more
    fixed: vendor fix RHSA-2026:26323
  • Red Hat Enterprise Linux AppStream (v. 10) tomcat9 9.0.117-1.el10_2, tomcat 10.1.49-1.el10_2.1, tomcat9-lib 9.0.117-1.el10_2, tomcat-lib 10.1.49-1.el10_2.1, tomcat9-webapps 9.0.117-1.el10_2, tomcat-webapps 10.1.49-1.el10_2.1, +10 more
    fixed: vendor fix RHSA-2026:19054
  • Red Hat Hardened Images tomcat10 10.1.54-1.hum1, tomcat11 11.0.21-0.1.hum1, tomcat10-lib 10.1.54-1.hum1, tomcat11-lib 11.0.21-0.1.hum1, tomcat10-common 10.1.54-1.hum1, tomcat10-webapps 10.1.54-1.hum1, +12 more
    fixed: vendor fix RHSA-2026:8334
  • Red Hat JBoss Web Server 6.2 on RHEL 8 jws6-tomcat-native 1.3.6-1.redhat_1.el8jws, jws6-tomcat 10.1.49-9.redhat_00007.1.el8jws, jws6-tomcat-lib 10.1.49-9.redhat_00007.1.el8jws, jws6-tomcat-javadoc 10.1.49-9.redhat_00007.1.el8jws, jws6-tomcat-selinux 10.1.49-9.redhat_00007.1.el8jws, jws6-tomcat-webapps 10.1.49-9.redhat_00007.1.el8jws, +5 more Red Hat JBoss Web Server 6.2 on RHEL 9 jws6-tomcat-native 1.3.6-1.redhat_1.el9jws, jws6-tomcat 10.1.49-9.redhat_00007.1.el9jws, jws6-tomcat-lib 10.1.49-9.redhat_00007.1.el9jws, jws6-tomcat-javadoc 10.1.49-9.redhat_00007.1.el9jws, jws6-tomcat-selinux 10.1.49-9.redhat_00007.1.el9jws, jws6-tomcat-webapps 10.1.49-9.redhat_00007.1.el9jws, +5 more Red Hat JBoss Web Server 6.2 on RHEL 10 jws6-tomcat-native 1.3.6-1.redhat_1.el10jws, jws6-tomcat 10.1.49-9.redhat_00007.1.el10jws, jws6-tomcat-lib 10.1.49-9.redhat_00007.1.el10jws, jws6-tomcat-javadoc 10.1.49-9.redhat_00007.1.el10jws, jws6-tomcat-selinux 10.1.49-9.redhat_00007.1.el10jws, jws6-tomcat-webapps 10.1.49-9.redhat_00007.1.el10jws, +5 more
    fixed: vendor fix RHSA-2026:5611
  • Red Hat JBoss Web Server 6.2.1
    fixed: vendor fix RHSA-2026:5612
  • Red Hat Enterprise Linux 6 tomcat6, tomcat6-lib, tomcat6-log4j, tomcat6-javadoc, tomcat6-webapps, tomcat6-el-2.1-api, +4 more Red Hat Enterprise Linux 7 tomcat, tomcat-lib, tomcat-jsvc, tomcat-javadoc, tomcat-webapps, tomcat-el-2.2-api, +4 more Red Hat Enterprise Linux 8 tomcat, tomcat-lib, tomcat-webapps, tomcat-el-3.0-api, pki-servlet-engine, tomcat-docs-webapp, +4 more Red Hat Enterprise Linux 9 pki-servlet-engine, pki-servlet-4.0-api
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
8 mo ago

Exploit prediction

0.57% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CNA 3.1 7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
OSV 3.1 7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected packages

ecosystem package affected fixed in
maven org.apache.tomcat:tomcat-coyote
>=11.0.0-M1, <11.0.18
>=10.1.0-M7, <10.1.52
>=9.0.83, <9.0.115
11.0.18
10.1.52
9.0.115
maven org.apache.tomcat.embed:tomcat-embed-core
>=11.0.0-M1, <11.0.18
>=10.1.0-M7, <10.1.52
>=9.0.83, <9.0.115
11.0.18
10.1.52
9.0.115
maven org.apache.tomcat:tomcat-coyote-ffm
>=11.0.0-M1, <11.0.18
>=10.1.0-M7, <10.1.52
>=9.0.83, <9.0.115
11.0.18
10.1.52
9.0.115
bitnami tomcat
>=9.0.83, <9.0.115
>=10.1.0, <10.1.52
>=11.0.0, <11.0.18
9.0.115
10.1.52
11.0.18

Affected products

  • Apache Software Foundation Apache Tomcat Native
  • Apache Software Foundation Apache Tomcat
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat JBoss Web Server 6.2.1
  • Red Hat Red Hat JBoss Web Server 6.2 on RHEL 10
  • Red Hat Red Hat JBoss Web Server 6.2 on RHEL 8
  • Red Hat Red Hat JBoss Web Server 6.2 on RHEL 9
  • Red Hat Red Hat Hardened Images
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat JBoss Web Server 5

Classification

Weakness
  • CWE-20 Improper Input Validation
  • CWE-295 Improper Certificate Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.