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TI-2025-32571 Aliases CVE-2025-52434GHSA-4j3c-42xv-3f84

Apache Tomcat: APR/Native Connector crash leading to DoS

Priority MEDIUM 43CWE-362Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 11 fixed, 4 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA, GitHub and Red Hat.

Summary

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') vulnerability in Apache Tomcat when using the APR/Native connector. This was particularly noticeable with client initiated closes of HTTP/2 connections. This issue affects Apache Tomcat: from 9.0.0.M1 through 9.0.106. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 through 8.5.100. Other, older, EOL versions may also be affected. Users are recommended to upgrade to version 9.0.107, which fixes the issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.02074 81st percentileScored 2026-11-07
Fix Partial org.apache.tomcat:tomcat-coyote (Maven): 9.0.107org.apache.tomcat.embed:tomcat-embed-core (Maven): 9.0.107Red Hat: 8 advisoriesRed Hat: 11 fixed, 4 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache Tomcat9.0.0.M1 – 9.0.106; 8.5.0 – 8.5.100—No fix listedCNA
—org.apache.tomcat:tomcat-coyote (Maven)9.0.0.M1 to before 9.0.1079.0.107Patch availableGHSA-4j3c-42xv-3f84
—org.apache.tomcat:tomcat-coyote (Maven)8.5.0 – 8.5.100—No fix listedGHSA-4j3c-42xv-3f84
—org.apache.tomcat.embed:tomcat-embed-core (Maven)9.0.0.M1 to before 9.0.1079.0.107Patch availableGHSA-4j3c-42xv-3f84
—org.apache.tomcat.embed:tomcat-embed-core (Maven)8.5.0 – 8.5.100—No fix listedGHSA-4j3c-42xv-3f84
  • Apache Tomcat VendorApache Affected 9.0.0.M1 – 9.0.106; 8.5.0 – 8.5.100 Fixed in — No fix listed CNA
  • org.apache.tomcat:tomcat-coyote (Maven) Vendor— Affected 9.0.0.M1 to before 9.0.107 Fixed in 9.0.107 Patch available GHSA-4j3c-42xv-3f84
  • org.apache.tomcat:tomcat-coyote (Maven) Vendor— Affected 8.5.0 – 8.5.100 Fixed in — No fix listed GHSA-4j3c-42xv-3f84
  • org.apache.tomcat.embed:tomcat-embed-core (Maven) Vendor— Affected 9.0.0.M1 to before 9.0.107 Fixed in 9.0.107 Patch available GHSA-4j3c-42xv-3f84
  • org.apache.tomcat.embed:tomcat-embed-core (Maven) Vendor— Affected 8.5.0 – 8.5.100 Fixed in — No fix listed GHSA-4j3c-42xv-3f84

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*9.0.0 to before 9.0.107VulnerableApache
  • cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* Versions 9.0.0 to before 9.0.107 Vulnerable ·Apache

Remediation

  • Fix · GHSA-4j3c-42xv-3f84 org.apache.tomcat:tomcat-coyote (Maven) Fixed in 9.0.107 Advisory →
  • Fix · GHSA-4j3c-42xv-3f84 org.apache.tomcat.embed:tomcat-embed-core (Maven) Fixed in 9.0.107 Advisory →

Red Hat 8 advisories

  • RHSA-2025:14180 Released 2025-08-20 · Red Hat rating Important
    tomcat security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) tomcat-1:9.0.87-1.el9_4.6, tomcat-admin-webapps-1:9.0.87-1.el9_4.6, tomcat-docs-webapp-1:9.0.87-1.el9_4.6 +5
  • RHSA-2025:14181 Released 2025-08-20 · Red Hat rating Important
    tomcat security update
    • Red Hat Enterprise Linux AppStream (v. 9) tomcat-1:9.0.87-3.el9_6.3, tomcat-admin-webapps-1:9.0.87-3.el9_6.3, tomcat-docs-webapp-1:9.0.87-3.el9_6.3 +5
  • RHSA-2025:14183 Released 2025-08-20 · Red Hat rating Important
    tomcat security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) tomcat-1:9.0.87-1.el9_2.6, tomcat-admin-webapps-1:9.0.87-1.el9_2.6, tomcat-docs-webapp-1:9.0.87-1.el9_2.6 +5
Show 5 more Red Hat advisories
  • RHSA-2025:14177 Released 2025-08-20 · Red Hat rating Important
    tomcat security update
    • Red Hat Enterprise Linux AppStream (v. 8) tomcat-1:9.0.87-1.el8_10.6, tomcat-admin-webapps-1:9.0.87-1.el8_10.6, tomcat-docs-webapp-1:9.0.87-1.el8_10.6 +5
  • RHSA-2025:14182 Released 2025-08-20 · Red Hat rating Important
    tomcat security update
    • Red Hat Enterprise Linux AppStream E4S (v.8.8) tomcat-1:9.0.87-1.el8_8.7, tomcat-admin-webapps-1:9.0.87-1.el8_8.7, tomcat-docs-webapp-1:9.0.87-1.el8_8.7 +5
    • Red Hat Enterprise Linux AppStream TUS (v.8.8) tomcat-1:9.0.87-1.el8_8.7, tomcat-admin-webapps-1:9.0.87-1.el8_8.7, tomcat-docs-webapp-1:9.0.87-1.el8_8.7 +5
  • RHSA-2025:14178 Released 2025-08-20 · Red Hat rating Important
    tomcat9 security update
    • Red Hat Enterprise Linux AppStream (v. 10) tomcat9-1:9.0.87-5.el10_0.3, tomcat9-admin-webapps-1:9.0.87-5.el10_0.3, tomcat9-docs-webapp-1:9.0.87-5.el10_0.3 +5
  • RHSA-2025:11696 Released 2025-07-28 · Red Hat rating Moderate
    Red Hat JBoss Web Server 5.8.5 release and security update
    • Red Hat JBoss Web Server 5.8.5
  • RHSA-2025:11695 Released 2025-07-28 · Red Hat rating Moderate
    Red Hat JBoss Web Server 5.8.5 release and security update
    • Red Hat JBoss Web Server 5.8 for RHEL 7 Server jws5-tomcat-9.0.87-12.redhat_00011.1.el7jws, jws5-tomcat-admin-webapps-9.0.87-12.redhat_00011.1.el7jws, jws5-tomcat-docs-webapp-9.0.87-12.redhat_00011.1.el7jws +9
    • Red Hat JBoss Web Server 5.8 for RHEL 8 jws5-tomcat-9.0.87-12.redhat_00011.1.el8jws, jws5-tomcat-admin-webapps-9.0.87-12.redhat_00011.1.el8jws, jws5-tomcat-docs-webapp-9.0.87-12.redhat_00011.1.el8jws +7
    • Red Hat JBoss Web Server 5.8 for RHEL 9 jws5-tomcat-9.0.87-12.redhat_00011.1.el9jws, jws5-tomcat-admin-webapps-9.0.87-12.redhat_00011.1.el9jws, jws5-tomcat-docs-webapp-9.0.87-12.redhat_00011.1.el9jws +7

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Apache Tomcat 8.5.0

    2 records Highest priority Priority MEDIUM 2 MEDIUM

    Other records, highest priority first

    • TI-2025-32628 Apache Tomcat: DoS via integer overflow in multipart file uploadPriority MEDIUM 43
    Show all 2 records →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 7AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 8AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2025:14178
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2025:14177
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2025:14181
Red Hat Enterprise Linux AppStream E4S (v.8.8)Fixed RHSA-2025:14182
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2025:14183
Red Hat Enterprise Linux AppStream EUS (v.9.4)Fixed RHSA-2025:14180
Red Hat Enterprise Linux AppStream TUS (v.8.8)Fixed RHSA-2025:14182
Red Hat JBoss Web Server 5.8 for RHEL 7 ServerFixed RHSA-2025:11695
Red Hat JBoss Web Server 5.8 for RHEL 8Fixed RHSA-2025:11695
Red Hat JBoss Web Server 5.8 for RHEL 9Fixed RHSA-2025:11695
Red Hat JBoss Web Server 5.8.5Fixed RHSA-2025:11696
Not affected: 1 product
  • Red Hat Enterprise Linux 10

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-52434
  2. 2026-10-03 Alias added: GHSA-4j3c-42xv-3f84

References

Advisory 2

Other 4

  • TI-2025-18529 Apache Tomcat: Potential RCE and/or information disclosure and/or information corruption with partial PUT KEVCVSS 3.1CRITICAL 10.0
  • TI-2020-01862 Improper privilege management in Apache Tomcat KEVCVSS 3.1CRITICAL 9.8
  • TI-2016-07192 Improper access control in Apache Tomcat KEVCVSS 3.1CRITICAL 9.8
  • TI-2017-09342 Unrestricted file upload in Apache Tomcat KEVCVSS 3.1HIGH 8.1
  • TI-2017-09340 Unrestricted file upload in Apache Tomcat KEVCVSS 3.1HIGH 8.1
  • TI-2026-26741 Apache Tomcat: Fix for CVE-2026-29146 allowed bypass of EncryptInterceptor KEVCVSS 3.1HIGH 7.5
See all 273 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences