CVE-2026-24734

Aliases:GHSA-mgp5-rv84-w37qBIT-tomcat-2026-24734UBUNTU-CVE-2026-24734DEBIAN-CVE-2026-24734
Advisory lineage Upstream: 0 Downstream: 21
Modified
Published: 17 Feb 2026, 18:53
Last modified:15 Jul 2026, 13:48

Vulnerability Summary

Overall Risk (default)
medium
30/100
CVSS Score
7.5 HIGH
v3.1 (nvd)
EPSS Score
0.5% LOW
0% probability +0.40%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

17 Feb 2026, 18:53
Published
Vulnerability first disclosed
15 Jul 2026, 13:48
Last Modified
Vulnerability 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

  • v3.1•HIGH•Score: 7.4CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS Trends

Current EPSS score: 0.50%• Percentile: 41%

Techniques & Countermeasures

  • CWE-20•Improper Input Validation

    The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

  • CWE-295•Improper Certificate Validation

    The product does not validate, or incorrectly validates, a certificate.

Affected Systems

  • apache software foundation•apache tomcat

    ≥ 11.0.0-M1, ≤ 11.0.17 | ≥ 10.1.0-M7, ≤ 10.1.51 | ≥ 9.0.83, ≤ 9.0.114

  • apache software foundation•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

  • apache•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

  • apache•tomcat_native

    ≥ 1.3.0, < 1.3.5 | ≥ 2.0.0, < 2.0.12

  • debian•tomcat10

    < 10.1.52-1~deb12u1 | < 10.1.52-1~deb13u1 | < 10.1.52-1

  • debian•tomcat11

    < 11.0.22-1~deb13u1 | < 11.0.18-1

  • debian•tomcat9

    < 9.0.70-2 | < 9.0.70-2 | < 9.0.70-2 | < 9.0.70-2

  • ubuntu•tomcat10

    all | all | all

  • ubuntu•tomcat11

    all

  • ubuntu•tomcat9

    all

  • 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

  • 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

References (16)