`CVE-2026-24734` Apache Tomcat

Affected software	Apache Tomcat
Severity	7.5 High CVSS 3.1 3 scores
Fixed in	`11.0.18`, `10.1.52`, `9.0.115`
Weakness	Improper input validation (CWE-20)
Published	17 Feb 2026
Updated	15 Jul 2026

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.

CWE-295

Exploitation status

No public exploit

No exploit has been reported in the sources we check.

CISA KEV not listed
VulnCheck KEV not listed
CISA Vulnrichment exploitation: none
Indexed PoC none indexed
EPSS 0.59% chance in 30 days

Waratek protection

No exploit published

Within Waratek scope. In the sources we check, nobody has published exploit code for this CVE or reported it being exploited.

A public code fix exists: apache/tomcat-native 69a977d.

Protection none
Action unverified
Review automated Upstream data
Record active

Decided by	Exploit code for this candidate, published in a reviewed catalogue or a GitHub repository with 5 or more stars, or in use per CISA or VulnCheck; not only a CISA verdict, a forecast, or nothing at all
Finding	This CVE is not listed in CISA KEV or VulnCheck KEV, CISA Vulnrichment records no active exploitation, no reviewed exploit catalogue carries an entry for it, and no GitHub PoC repository for it has 5 or more stars. Nobody has published exploit code worth tracing, so it is not a candidate for a rule ahead of the ones where somebody has; an upstream fix path does exist, so the remediation half of the candidacy still holds. This is a statement about what has been published, not about whether the defect is reachable or serious.
Candidate fix	https://bugzilla.redhat.com/show_bug.cgi?id=2440426 : a Red Hat bug: the triage, which links onward to the fix

Decided by

Exploit code for this candidate, published in a reviewed catalogue or a GitHub repository with 5 or more stars, or in use per CISA or VulnCheck; not only a CISA verdict, a forecast, or nothing at all

Finding

This CVE is not listed in CISA KEV or VulnCheck KEV, CISA Vulnrichment records no active exploitation, no reviewed exploit catalogue carries an entry for it, and no GitHub PoC repository for it has 5 or more stars. Nobody has published exploit code worth tracing, so it is not a candidate for a rule ahead of the ones where somebody has; an upstream fix path does exist, so the remediation half of the candidacy still holds. This is a statement about what has been published, not about whether the defect is reachable or serious.

Candidate fix

https://bugzilla.redhat.com/show_bug.cgi?id=2440426 : a Red Hat bug: the triage, which links onward to the fix

CVSS

7.5 HIGH v3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N 3 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

Version Score Band Vector Assigner Type

CVSS 3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N NVD Primary published

CVSS 3.1 7.4 HIGH CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N CISA-ADP Secondary

CVSS 3.1 7.4 HIGH CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N redhat-SADP Secondary

Version	Score	Band	Vector	Assigner	Type
CVSS 3.1	7.5	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N`	NVD	Primary	published
CVSS 3.1	7.4	HIGH	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N`	CISA-ADP	Secondary
CVSS 3.1	7.4	HIGH	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N`	redhat-SADP	Secondary

Affected software and releases

Oracle advisories

Advisory	Type	Quarter	Products Oracle names in its risk matrix
Oracle Critical Patch Update July 2026 ↗	CPU	2026-Q3	Oracle Siebel CRM / Marketing (Apache Tomcat) (17.0-26.5)
Oracle Critical Patch Update April 2026 ↗	CPU	2026-Q2	Oracle Commerce / Content Acquisition System, Endeca Application Controller, Experience Manager (Apache Tomcat) (11.4.0) Oracle Communications / Configuration Management Platform (Apache Tomcat) (15.0.0.0.0) Oracle Communications / Core (Apache Tomcat) (6.1.1-7.0.0) Oracle Communications / Third Party (Apache Tomcat) (9.0.0-9.0.4) Oracle Communications / Third Party (Apache Tomcat) (9.0.0-9.0.4) Oracle Hospitality Applications / Next-Gen SPMS (Apache Tomcat) (23.1.5-23.3.0) Oracle Utilities Applications / Tools (Apache Tomcat) (7.0.0.0.7, 7.0.0.1.5, 25.4.0.0.2)

Advisory

Type

Quarter

Products Oracle names in its risk matrix

Oracle Critical Patch Update July 2026 ↗

CPU

2026-Q3

Oracle Siebel CRM / Marketing (Apache Tomcat) (17.0-26.5)

Oracle Critical Patch Update April 2026 ↗

CPU

2026-Q2

Oracle Commerce / Content Acquisition System, Endeca Application Controller, Experience Manager (Apache Tomcat) (11.4.0)
Oracle Communications / Configuration Management Platform (Apache Tomcat) (15.0.0.0.0)
Oracle Communications / Core (Apache Tomcat) (6.1.1-7.0.0)
Oracle Communications / Third Party (Apache Tomcat) (9.0.0-9.0.4)
Oracle Communications / Third Party (Apache Tomcat) (9.0.0-9.0.4)
Oracle Hospitality Applications / Next-Gen SPMS (Apache Tomcat) (23.1.5-23.3.0)
Oracle Utilities Applications / Tools (Apache Tomcat) (7.0.0.0.7, 7.0.0.1.5, 25.4.0.0.2)

Oracle components and versions

Family	Component	Versions, as Oracle lists them	Read as
Oracle Commerce	Content Acquisition System, Endeca Application Controller, Experience Manager (Apache Tomcat)	11.4.0	11.4.0
Oracle Communications	Configuration Management Platform (Apache Tomcat)	15.0.0.0.0	15.0.0.0.0
Oracle Communications	Core (Apache Tomcat)	6.1.1-7.0.0
Oracle Communications	Third Party (Apache Tomcat)	9.0.0-9.0.4
Oracle Hospitality Applications	Next-Gen SPMS (Apache Tomcat)	23.1.5-23.3.0
Oracle Siebel CRM	Marketing (Apache Tomcat)	17.0-26.5
Oracle Utilities Applications	Tools (Apache Tomcat)	7.0.0.0.7, 7.0.0.1.5, 25.4.0.0.2	7.0.0.0.7 · 7.0.0.1.5 · 25.4.0.0.2

Family

Component

Versions, as Oracle lists them

Read as

Oracle Commerce

Content Acquisition System, Endeca Application Controller, Experience Manager (Apache Tomcat)

11.4.0

Oracle Communications

Configuration Management Platform (Apache Tomcat)

15.0.0.0.0

Oracle Communications

Core (Apache Tomcat)

6.1.1-7.0.0

Oracle Communications

Third Party (Apache Tomcat)

9.0.0-9.0.4

Oracle Hospitality Applications

Next-Gen SPMS (Apache Tomcat)

23.1.5-23.3.0

Oracle Siebel CRM

Marketing (Apache Tomcat)

17.0-26.5

Oracle Utilities Applications

Tools (Apache Tomcat)

7.0.0.0.7, 7.0.0.1.5, 25.4.0.0.2

7.0.0.0.7 · 7.0.0.1.5 · 25.4.0.0.2

Maven packages

Affected and fixed versions, from OSV.dev

Package Introduced Fixed Last affected

org.apache.tomcat:tomcat-coyote 11.0.0-M1 11.0.18 unbounded

org.apache.tomcat:tomcat-coyote 10.1.0-M7 10.1.52 unbounded

org.apache.tomcat:tomcat-coyote 9.0.83 9.0.115 unbounded

org.apache.tomcat.embed:tomcat-embed-core 11.0.0-M1 11.0.18 unbounded

org.apache.tomcat.embed:tomcat-embed-core 10.1.0-M7 10.1.52 unbounded

org.apache.tomcat.embed:tomcat-embed-core 9.0.83 9.0.115 unbounded

org.apache.tomcat:tomcat-coyote-ffm 11.0.0-M1 11.0.18 unbounded

org.apache.tomcat:tomcat-coyote-ffm 10.1.0-M7 10.1.52 unbounded

org.apache.tomcat:tomcat-coyote-ffm 9.0.83 9.0.115 unbounded

Package	Introduced	Fixed	Last affected
`org.apache.tomcat:tomcat-coyote`	11.0.0-M1	`11.0.18`	unbounded
`org.apache.tomcat:tomcat-coyote`	10.1.0-M7	`10.1.52`	unbounded
`org.apache.tomcat:tomcat-coyote`	9.0.83	`9.0.115`	unbounded
`org.apache.tomcat.embed:tomcat-embed-core`	11.0.0-M1	`11.0.18`	unbounded
`org.apache.tomcat.embed:tomcat-embed-core`	10.1.0-M7	`10.1.52`	unbounded
`org.apache.tomcat.embed:tomcat-embed-core`	9.0.83	`9.0.115`	unbounded
`org.apache.tomcat:tomcat-coyote-ffm`	11.0.0-M1	`11.0.18`	unbounded
`org.apache.tomcat:tomcat-coyote-ffm`	10.1.0-M7	`10.1.52`	unbounded
`org.apache.tomcat:tomcat-coyote-ffm`	9.0.83	`9.0.115`	unbounded

Products and versions

5 products, 60 version entries

Source	Vendor	Product	Scheme	Affected versions
nvd	apache	tomcat	generic	≥ 9.0.83 and ＜ 9.0.115 · 10.1.0:milestone1 · 10.1.0:milestone10 · 10.1.0:milestone11 · 10.1.0:milestone12 · 10.1.0:milestone13 · 10.1.0:milestone14 · 10.1.0:milestone15 · 10.1.0:milestone16 · 10.1.0:milestone17 · 10.1.0:milestone18 · 10.1.0:milestone19 · 10.1.0:milestone2 · 10.1.0:milestone20 · 10.1.0:milestone3 · 10.1.0:milestone4 · 10.1.0:milestone5 · 10.1.0:milestone6 · 10.1.0:milestone7 · 10.1.0:milestone8 · 10.1.0:milestone9 · ≥ 10.1.1 and ＜ 10.1.52 · 11.0.0:milestone1 · 11.0.0:milestone10 · 11.0.0:milestone11 · 11.0.0:milestone12 · 11.0.0:milestone13 · 11.0.0:milestone14 · 11.0.0:milestone15 · 11.0.0:milestone16 · 11.0.0:milestone17 · 11.0.0:milestone18 · 11.0.0:milestone19 · 11.0.0:milestone2 · 11.0.0:milestone20 · 11.0.0:milestone21 · 11.0.0:milestone22 · 11.0.0:milestone23 · 11.0.0:milestone24 · 11.0.0:milestone25 · 11.0.0:milestone26 · 11.0.0:milestone3 · 11.0.0:milestone4 · 11.0.0:milestone5 · 11.0.0:milestone6 · 11.0.0:milestone7 · 11.0.0:milestone8 · 11.0.0:milestone9 · ≥ 11.0.1 and ＜ 11.0.18
nvd	apache	tomcat native	generic	≥ 1.3.0 and ＜ 1.3.5 · ≥ 2.0.0 and ＜ 2.0.12
osv	org.apache.tomcat	tomcat-coyote	generic	≥ 9.0.83 and ＜ 9.0.115 · ≥ 10.1.0 and ＜ 10.1.52 · ≥ 11.0.0 and ＜ 11.0.18
osv	org.apache.tomcat	tomcat-coyote-ffm	generic	≥ 9.0.83 and ＜ 9.0.115 · ≥ 10.1.0 and ＜ 10.1.52 · ≥ 11.0.0 and ＜ 11.0.18
osv	org.apache.tomcat.embed	tomcat-embed-core	generic	≥ 9.0.83 and ＜ 9.0.115 · ≥ 10.1.0 and ＜ 10.1.52 · ≥ 11.0.0 and ＜ 11.0.18

Source

Vendor

Product

Scheme

Affected versions

nvd

apache

tomcat

generic

≥ 9.0.83 and ＜ 9.0.115 · 10.1.0:milestone1 · 10.1.0:milestone10 · 10.1.0:milestone11 · 10.1.0:milestone12 · 10.1.0:milestone13 · 10.1.0:milestone14 · 10.1.0:milestone15 · 10.1.0:milestone16 · 10.1.0:milestone17 · 10.1.0:milestone18 · 10.1.0:milestone19 · 10.1.0:milestone2 · 10.1.0:milestone20 · 10.1.0:milestone3 · 10.1.0:milestone4 · 10.1.0:milestone5 · 10.1.0:milestone6 · 10.1.0:milestone7 · 10.1.0:milestone8 · 10.1.0:milestone9 · ≥ 10.1.1 and ＜ 10.1.52 · 11.0.0:milestone1 · 11.0.0:milestone10 · 11.0.0:milestone11 · 11.0.0:milestone12 · 11.0.0:milestone13 · 11.0.0:milestone14 · 11.0.0:milestone15 · 11.0.0:milestone16 · 11.0.0:milestone17 · 11.0.0:milestone18 · 11.0.0:milestone19 · 11.0.0:milestone2 · 11.0.0:milestone20 · 11.0.0:milestone21 · 11.0.0:milestone22 · 11.0.0:milestone23 · 11.0.0:milestone24 · 11.0.0:milestone25 · 11.0.0:milestone26 · 11.0.0:milestone3 · 11.0.0:milestone4 · 11.0.0:milestone5 · 11.0.0:milestone6 · 11.0.0:milestone7 · 11.0.0:milestone8 · 11.0.0:milestone9 · ≥ 11.0.1 and ＜ 11.0.18

nvd

apache

tomcat native

generic

≥ 1.3.0 and ＜ 1.3.5 · ≥ 2.0.0 and ＜ 2.0.12

osv

org.apache.tomcat

tomcat-coyote

generic

≥ 9.0.83 and ＜ 9.0.115 · ≥ 10.1.0 and ＜ 10.1.52 · ≥ 11.0.0 and ＜ 11.0.18

osv

org.apache.tomcat

tomcat-coyote-ffm

generic

≥ 9.0.83 and ＜ 9.0.115 · ≥ 10.1.0 and ＜ 10.1.52 · ≥ 11.0.0 and ＜ 11.0.18

osv

org.apache.tomcat.embed

tomcat-embed-core

generic

≥ 9.0.83 and ＜ 9.0.115 · ≥ 10.1.0 and ＜ 10.1.52 · ≥ 11.0.0 and ＜ 11.0.18

References

URL	Tags
https://bugzilla.redhat.com/show_bug.cgi?id=2440426	bugzilla
https://github.com/apache/tomcat-native/commit/69a977dd427ad2a6da0f10aca3872386ee27f681	WEB
https://github.com/apache/tomcat/commit/e76e9eaa246f30debd603726d9147a8a8cb5171c	WEB
https://access.redhat.com/errata/RHSA-2026:19054	WEB
https://access.redhat.com/errata/RHSA-2026:26323	WEB
https://access.redhat.com/errata/RHSA-2026:36790	WEB
https://access.redhat.com/errata/RHSA-2026:5611	WEB
https://access.redhat.com/errata/RHSA-2026:5612	WEB
https://access.redhat.com/errata/RHSA-2026:6569	WEB
https://access.redhat.com/errata/RHSA-2026:8334	WEB

URL

Timeline

Published	2026-02-17	By the CVE Program.
NVD record modified	2026-07-15	NVD's own last-modified date for this record.

Published

2026-02-17

By the CVE Program.

NVD record modified

2026-07-15

NVD's own last-modified date for this record.

How VRT decided (17 of 24 rules ran)

17 of 24 rules ran. The rest didn't run because an earlier rule had already settled the CVE.

# Rule Outcome Status Detail

identity: Does this identifier describe a vulnerability at all? the first rule that matches decides

1 rejected no match CVE Program withdrawal of this identifier

scope: Is it a vulnerability Waratek protects? the first rule that matches decides

2 armr-patch-file no match An ARMR patch file on disk for this CVE

3 armr-secure-rule-file no match An ARMR security-rule template on disk for this CVE

4 manual-classification no match A researcher's recorded decision for this specific CVE

5 manual classification no match Manual classification of this CVE in the legacy dataset

6 non-java-upstream no match A root cause in non-Java code: an OS kernel, a C library, or a bundled runtime

7 oracle-component no match The defect being in a component of a tracked product the agent does not reach: JavaFX, the Java SE installer, the JInitiator browser plug-in, the native WebLogic proxy plug-in, or a native part of Oracle Application Server or Collaboration Suite (HTTP Server, Web Cache, Internet Directory, mail and calendar servers). Oracle gives these no CPE of their own and names them only in the description.

8 java-client-side no match Oracle's own risk-matrix note saying the CVE is reached only through untrusted code in the Java sandbox (applets, Web Start) or only through a client installation of Java, so a server running its own trusted code is not exposed

9 osv-maven matched In scope Maven packages: org.apache.tomcat:tomcat-coyote, org.apache.tomcat.embed:tomcat-embed-core, org.apache.tomcat:tomcat-coyote-ffm

10 cna-maven-package not reached An affected Maven artifact named by the CNA itself

11 known-cpe-product not reached An NVD CPE naming a product ARMR tracks

12 cna-cpe-product not reached A CPE the CNA published naming a tracked product. Oracle publishes these on advisory day, months before NVD.

13 oracle-advisory-family not reached A tracked product family named in Oracle's own risk matrix. CPE cannot carry a suite name, only a module.

14 cna-named-product not reached A tracked product named in words by the CVE's own CNA, on a record with no CPE yet. Apache and Eclipse publish these on advisory day, before NVD adds CPE data.

15 non-deployable-product not reached The only affected product being a sealed appliance image, where Java runs but no -javaagent can be attached

16 unmatched-product not reached No tracked product matched above, and none present at all

disposition: What do we do about one that is? every rule runs

17 patch-hint matched Mitigation candidate References include candidate fix URL (bugzilla tier): https://bugzilla.redhat.com/show_bug.cgi?id=2440426

18 open-source-maven skipped The affected package being open source on Maven, so the fix can be read

19 poc-derivable skipped An indexed exploit clearing the evidence bar to reverse-engineer, where there is no source to read

20 no-exploit skipped Nothing to build a rule from yet: no published exploit, no CISA record of exploitation and no source-level change to read

21 secure-rule-match no match A vulnerability class already blocked by an ARMR security rule

22 exploited-no-fix-or-poc skipped Somebody exploiting this CVE (a CISA or VulnCheck KEV listing, or a CISA verdict of active exploitation), with no fix, source code or PoC to build a rule from

23 below-action-threshold no match Severity is HIGH — only MEDIUM/LOW are deprioritized

24 no-exploit-published decided it matched No exploit published No exploit code has been published, and an upstream fix path does exist, so the remediation half of the candidacy still holds.

Products the scope rules checked

The products this CVE's record names, and whether VRT tracks each one. The scope rules decided on these.

Vendor Product Tracked CPE Source

apache tomcat tracked cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* yaml

apache tomcat_native not tracked cpe:2.3:a:apache:tomcat_native:*:*:*:*:*:*:*:*

NVD ↗ · CVE.org ↗