CVE-2026-34500 | Apache Tomcat: OCSP checks sometimes soft-fail with FFM even when soft-fail is disabled

CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled and FFM is used in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M14 through 11.0.20, from 10.1.22 through 10.1.53, from 9.0.92 through 9.0.116. Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117, which fixes the issue.

Published: 2026-04-09 Last update: 2026-04-14 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-34500 is rated Low Risk (38.3/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.15%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-34500

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-03 0.16% 0.15% -0.01%
2 2026-04-15 0.05% 0.16% +0.11%
3 2026-04-11 — 0.05% —

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-34500

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 2.2 4.2 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2026-34500

GitHub Security Advisory for CVE-2026-34500

GHSA-24j9-x2wg-9qv6 · Severity: medium · Ecosystem: maven — Apache Tomcat: CLIENT_CERT authentication does not fail as expected

OS Trackers for CVE-2026-34500

vendor priority summary link
debian not yet assigned CVE-2026-34500 not yet assigned priority: Debian including 3 source packages (tomcat10, tomcat11, tomcat9), 12 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 9, open 3. https://security-tracker.debian.org/tracker/CVE-2026-34500
redhat medium — https://access.redhat.com/security/cve/CVE-2026-34500
suse medium CVE-2026-34500 severity moderate: SUSE including 34 source package names (tomcat, tomcat-9.0.117-1.1, …), 34 product×package rows across 2 product lines (SUSE Linux Enterprise Server Teradata 12 SP3, openSUSE Tumbleweed): Fixed 33, Known Not Affected 1. https://www.suse.com/security/cve/CVE-2026-34500/
ubuntu medium CVE-2026-34500 medium priority: Ubuntu including 6 source packages (tomcat10, tomcat11, tomcat6, tomcat7, tomcat8, tomcat9), 33 status rows across 8 suites (bionic, focal, jammy, noble, questing, trusty, upstream, xenial): needs-triage 18, DNE 12, ignored 3. https://ubuntu.com/security/CVE-2026-34500

Affected software / configurations for CVE-2026-34500

Vendor Product Version Raw CPE
apache tomcat >= 9.0.92, < 9.0.117 cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat >= 10.1.22, < 10.1.54 cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat >= 11.0.1, < 11.0.21 cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone14:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone15:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone16:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone17:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone18:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone19:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone20:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone21:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone22:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone23:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone24:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone25:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone26:*:*:*:*:*:*

References for CVE-2026-34500

cvelogic Threat Intelligence