7.5

CVE-2026-24734: apache software foundation apache tomcat Improper Input Validation

CVSS: 7.5v3.1HighModified
AliasesRHSA-2026:19054RHSA-2026:5611UBUNTU-CVE-2026-24734
Published 17-02-2026Last modified 15-07-2026
Open JSON

Vulnerability summary

CVE-2026-24734 is a high (CVSS 7.5) Improper Input Validation vulnerability in apache software foundation apache tomcat. EPSS estimates a 0.57% chance of exploitation in the next 30 days, higher than 46.2% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.57%
0%100%
Low · +0.06 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 16 · Related 12
DSA-6120-1MGASA-2026-0056OPENSUSE-SU-2026:10305-1OPENSUSE-SU-2026:10306-1OPENSUSE-SU-2026:10307-1OPENSUSE-SU-2026:20350-1

Timeline

  1. 17-02-2026
    PublishedVulnerability first disclosed.
  2. 15-07-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

0.57%

Chance of exploitation in the next 30 days

Percentile

46%

Versus all other CVEs

30-day change

+0.06 pp

From 0.52% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.57%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Redhat20 products
  • jws6-tomcat< 0:10.1.49-9.redhat_00007.1.el10jws | < 0:10.1.49-9.redhat_00007.1.el8jws | < 0:10.1.49-9.redhat_00007.1.el9jws
  • jws6-tomcat-admin-webapps< 0:10.1.49-9.redhat_00007.1.el10jws | < 0:10.1.49-9.redhat_00007.1.el8jws | < 0:10.1.49-9.redhat_00007.1.el9jws
  • jws6-tomcat-docs-webapp< 0:10.1.49-9.redhat_00007.1.el10jws | < 0:10.1.49-9.redhat_00007.1.el8jws | < 0:10.1.49-9.redhat_00007.1.el9jws
  • jws6-tomcat-el-5.0-api< 0:10.1.49-9.redhat_00007.1.el10jws | < 0:10.1.49-9.redhat_00007.1.el8jws | < 0:10.1.49-9.redhat_00007.1.el9jws
  • jws6-tomcat-javadoc< 0:10.1.49-9.redhat_00007.1.el10jws | < 0:10.1.49-9.redhat_00007.1.el8jws | < 0:10.1.49-9.redhat_00007.1.el9jws
Chainguard14 products
  • kayenta-2025.0< 2025.0.8-r9
  • kayenta-2025.1< 2025.1.6-r7
  • kayenta-2025.2< 2025.2.4-r3
  • kayenta-2025.4< 2025.4.3-r4
  • kayenta-2026.0< 2026.0.2-r4
Debian3 products
  • tomcat10< 10.1.52-1~deb12u1 | < 10.1.52-1~deb13u1 | < 10.1.52-1
  • tomcat11< 11.0.22-1~deb13u1 | < 11.0.18-1
  • tomcat9< 9.0.70-2
Ubuntu3 products
  • tomcat10All versions (No fix recorded)
  • tomcat11All versions (No fix recorded)
  • tomcat9All versions (No fix recorded)
Apache2 products
  • tomcat≥ 9.0.83, < 9.0.115 | ≥ 10.1.1, < 10.1.52 | ≥ 11.0.1, < 11.0.18 | 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 | 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
  • tomcat_native≥ 1.3.0, < 1.3.5 | ≥ 2.0.0, < 2.0.12
Apache software foundation2 products
  • apache tomcat≥ 11.0.0-M1, ≤ 11.0.17 | ≥ 10.1.0-M7, ≤ 10.1.51 | ≥ 9.0.83, ≤ 9.0.114
  • apache tomcat native≥ 1.1.23, ≤ 1.1.34 | ≥ 1.2.0, ≤ 1.2.39 | ≥ 1.3.0, ≤ 1.3.4 | ≥ 2.0.0, ≤ 2.0.11
Org.apache.tomcat1 product
  • tomcat-coyote≥ 11.0.0-M1, < 11.0.18 | ≥ 10.1.0-M7, < 10.1.52 | ≥ 9.0.83, < 9.0.115
Org.apache.tomcat.embed1 product
  • tomcat-embed-core≥ 11.0.0-M1, < 11.0.18 | ≥ 10.1.0-M7, < 10.1.52 | ≥ 9.0.83, < 9.0.115

8 vendors · 46 products

References

21 links
Show all 21 references