CVE-2026-24734

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.

How to fix CVE-2026-24734

To remediate CVE-2026-24734, upgrade the affected package to a fixed version below.

—upgrade to 9.0.115 or later
—upgrade to 10.1.52-1~deb12u1 or later
—no fix listed
—upgrade to 9.0.70-2 or later
—upgrade to 11.0.18 or later
—upgrade to 11.0.18 or later

Is CVE-2026-24734 being exploited?

Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.

Affected packages (6)

>= 9.0.83, < 9.0.115, >= 10.1.0, < 10.1.52, >= 11.0.0, < 11.0.18
from 0, < 10.1.52-1~deb12u1
from 0
from 0, < 9.0.70-2
>= 11.0.0-M1, < 11.0.18
>= 11.0.0-M1, < 11.0.18

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	HIGH7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N