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CVE-2026-34500 Apache Tomcat

Affected softwareApache Tomcat
Severity6.5 Medium CVSS 3.1
Fixed in9.0.117, 10.1.54, 11.0.21
WeaknessImproper authentication (CWE-287)
Published9 Apr 2026
Updated26 Oct 2026

Description

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.

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 0.46% 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 29b56a5.

  • 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.

Affected software and releases

Oracle advisories

AdvisoryTypeQuarterProducts Oracle names in its risk matrix
Oracle Critical Patch Update October 2026 ↗ CPU 2026-Q4 Oracle Communications / Security (Apache Tomcat) (47.0.0.2.0)
Oracle Critical Patch Update July 2026 ↗ CPU 2026-Q3 Oracle Communications / Core (Apache Tomcat) (6.1.1-7.0.0)
Oracle Siebel CRM / EAI (Apache Tomcat) (17.0-26.5)
Oracle Critical Security Patch Update May 2026 ↗ CSPU 2026-Q2 Oracle Communications / Core (Apache Tomcat) (6.1.1-7.0.0)

Oracle components and versions

FamilyComponentVersions, as Oracle lists themRead as
Oracle Communications Core (Apache Tomcat) 6.1.1-7.0.0
Oracle Communications Security (Apache Tomcat) 47.0.0.2.0 47.0.0.2.0
Oracle Siebel CRM EAI (Apache Tomcat) 17.0-26.5

Maven packages

Affected and fixed versions, from OSV.dev
PackageIntroducedFixedLast affected
org.apache.tomcat:tomcat-coyote-ffm 9.0.92 9.0.117 unbounded
org.apache.tomcat:tomcat-coyote-ffm 10.1.22 10.1.54 unbounded
org.apache.tomcat:tomcat-coyote-ffm 11.0.0-M14 11.0.21 unbounded

Products and versions

2 products, 19 version entries
SourceVendorProductSchemeAffected versions
nvd apache tomcat generic ≥ 9.0.92 and < 9.0.117 · ≥ 10.1.22 and < 10.1.54 · 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: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 · ≥ 11.0.1 and < 11.0.21
osv org.apache.tomcat tomcat-coyote-ffm generic ≥ 9.0.92 and < 9.0.117 · ≥ 10.1.22 and < 10.1.54 · ≥ 11.0.0 and < 11.0.21

References

URLTags
https://github.com/apache/tomcat/commit/29b56a56ce9e7d044b6162a99af0f38529b3a208 WEB
https://github.com/apache/tomcat/commit/c13e60e732ea6d07087293a41ad1866c20848271 WEB
https://github.com/apache/tomcat/commit/ff589ab26e8250a2ca4286d986305318c033ff9f WEB
https://github.com/apache/tomcat PACKAGE
https://lists.apache.org/thread/7rcl4zdxryc8hy3htyfyxkbqpxjtfdl2 WEB
https://tomcat.apache.org/security-10.html#Fixed_in_Apache_Tomcat_10.1.54 WEB
https://tomcat.apache.org/security-11.html#Fixed_in_Apache_Tomcat_11.0.21 WEB
https://tomcat.apache.org/security-9.html#Fixed_in_Apache_Tomcat_9.0.117 WEB
http://www.openwall.com/lists/oss-security/2026/04/09/29 WEB

Timeline

Published2026-04-09By the CVE Program.
NVD record modified2026-10-26NVD's own last-modified date for this record.