CVE-2026-86247
📛 CVE Title
Apache Tomcat Native: Client certificate requirements can be down-graded
Description
Race condition within a thread vulnerability in Apache Tomcat Native allowed client certificate verification requirements to be down-graded for some configurations. This issue affects Apache Tomcat Native: from 2.0.0 through 2.0.15, from 1.3.0 through 1.3.8. Unsupported versions may also be affected. Users are recommended to upgrade to version 2.0.16 or 1.3.9, which fixes the issue.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- apache
- CVSS severity
- —
- CVSS score
- —
- CVSS vector
- —
- Effective score
- 7.4 / 10 HIGH source: NVD
- CWE(s)
-
CWE-366 - Reserved
- 2026-09-06
- Published
- 2026-09-23 12:31 UTC
- Last updated
- 2026-09-23 18:10 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/86xxx/CVE-2026-86247.json
- Linked Threat
- CVE-2026-86247 — Apache Tomcat Native: Client certificate requirements can be down-graded
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2026-09-23 13:17:31 UTC
- NVD last modified
- 2026-09-23 19:19:41 UTC
- NVD CVSS v3.1
- 7.4 / 10 HIGH source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
- NVD CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N- Exploitability subscore
- 2.2 / 10
- Impact subscore
- 5.2 / 10
NVD / KEV / EPSS data refreshed 2026-09-24 04:33 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-85270 - Assigner
- apache
- Published
- Sep 23, 2026, 12:31:53 PM
- Updated
- Sep 23, 2026, 6:10:50 PM
- EUVD base score (CVSS 3.1)
-
7.4 / 10
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N - EUVD-reported EPSS
- 0.0000
- Vendors
- Apache Software Foundation
- Products
-
Apache Tomcat Native (1.3.0 ≤1.3.8)Apache Tomcat Native (2.0.0 ≤2.0.15)
- Aliases
-
GHSA-jhrw-x5gg-jjqw
ENISA description: Race condition within a thread vulnerability in Apache Tomcat Native allowed client certificate verification requirements to be down-graded for some configurations. This issue affects Apache Tomcat Native: from 2.0.0 through 2.0.15, from 1.3.0 through 1.3.8. Unsupported versions may also be affected. Users are recommended to upgrade to version 2.0.16 or 1.3.9, which fixes the issue.
EUVD references (1)
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| Apache Software Foundation | Apache Tomcat Native |
2.0.0 (affected),
1.3.0 (affected)
|
— |
Vendor references (1)
References embedded in the original CVE record by the assigning CNA.
- https://lists.apache.org/thread/obsson6zhvfg0wsp2bx602l61ltj87r1 vendor-advisory
Web references (0)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
No web references attached yet.
NVD-tagged references (2)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- http://www.openwall.com/lists/oss-security/2026/09/23/33 af854a3a-2127-422b-91ae-364da2661108
- https://lists.apache.org/thread/obsson6zhvfg0wsp2bx602l61ltj87r1 security@apache.org
Remediations (18)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:feedly.com
A vulnerability was found in Apache Tomcat Native up to 1.3.8/2.0.15 . It has been rated as critical . Affected by this vulnerability is an unknown functionality. The manipulation leads to race condition. This vulnerability is uniquely identified as CVE-2026-86247 . The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is advised.
2026-09-24 11:49 UTC -
web:sec.cloudapps.cisco.com
On September 16, 2026 , the Cisco Product Security Incident Response Team (PSIRT) published the advisories that are listed in the following tables. To remediate these vulnerabilities, Cisco strongly recommends that customers upgrade to the fixed software that is indicated in the advisories. For more information about changes in Cisco PSIRT vulnerability disclosure, see Strengthening the ...
2026-09-24 11:49 UTC -
web:security-tracker.debian.org
Vulnerable and fixed packages The table below lists information on source packages.
2026-09-24 11:49 UTC -
web:senserva.com
Every Microsoft security patch (KB) and the CVEs it fixes, with severity, CVSS, and CISA KEV status. Cross-linked to the CVE reference.
2026-09-24 11:49 UTC -
web:support.sap.com
SAP security Patch Day Bulletin This post shares the information on security notes that remediate vulnerabilities discovered in SAP products. SAP strongly recommends that the customer visits the support portal and applies patches on priority to protect their SAP landscape. On 9th of June 2026 , SAP security patch day saw the release of 15 new security notes.
2026-09-24 11:49 UTC -
web:www.aikido.dev
CVE remediation is fixing known flaws in the software you run. Why upgrading often fails, what remediation actually involves, and how backporting fixes it.
2026-09-24 11:49 UTC -
web:www.oracle.com
This Critical Patch Update contains 1448 new security patches across the product families listed below. Please note that a My Oracle Support (MOS) note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at July 2026 Critical Patch Update: Executive Summary and Analysis.
2026-09-24 11:49 UTC -
web:www.oracle.com
Additional CVEs addressed are: The patch for CVE - 2026 -34481 also addresses CVE - 2026 -34477, CVE - 2026 -34478, CVE - 2026 -34479, and CVE - 2026 -34480. Oracle Fusion Middleware Risk Matrix This Critical Security Patch Update contains 106 new security patches for Oracle Fusion Middleware. 53 of these vulnerabilities may be remotely exploitable without authentication, i.e., may be exploited over a ...
2026-09-24 11:49 UTC -
web:www.rapid7.com
CVE-2026-86247 : Apache Software Foundation Apache Tomcat Native: Race condition within a thread vulnerability in Apache Tomcat Native allowed client certificate verification…. View severity, references, and remediation details from Rapid7.
2026-09-24 11:49 UTC -
web:zecurit.com
Get the complete breakdown of Microsoft's September 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .
2026-09-24 11:49 UTC -
web:anonhaven.com
CVE Details CVE ID CVE-2026-86247 Published Date Sep 23, 2026 Vendor Apache Severity NONE Source
2026-09-25 10:08 UTC -
web:app.opencve.io
Remediation No vendor fix or workaround currently provided. OpenCVE Recommended Actions Upgrade Apache Tomcat Native to v2.0.16 or v1.3.9 to apply the vendor fix . Re‑enable strict client‑certificate verification in your TLS configuration to prevent downgrading paths, ensuring that only certificates meeting the required criteria are accepted.
2026-09-25 10:08 UTC -
web:cvefeed.io
The following list is the news that have been mention CVE-2026-86247 vulnerability anywhere in the article. Results are limited to the first 20 news articles due to potential performance issues. EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
2026-09-25 10:08 UTC -
web:support.servicenow.com
What you need to know: On September 24, 2026 , ServiceNow issued CVE - 2026 -86857, CVE - 2026 -86858, CVE - 2026 -13016, CVE - 2026 -86859, and CVE - 2026 -86860. Each of these security issues was identified through
2026-09-25 10:08 UTC -
web:support.servicenow.com
Overview The advisories below document publicly disclosed Common Vulnerabilities and Exposures ( CVEs ) in the Now Platform by ServiceNow. Because ServiceNow uses various methods to communicate vulnerability information, patches, and other fixes, customers should review family, security patch , and hotfix release notes, which are available at https://docs.servicenow.com, for a complete list of ...
2026-09-25 10:08 UTC -
web:vulners.com
CVE-2026-86247 Apache Tomcat Native: Client certificate requirements can be down-graded 🗓️ 23 Sep 2026 05:31:53 Reported by apache Type cvelist 🔗 www. cve .org 👁 35 Views
2026-09-25 10:08 UTC -
web:windowsforum.com
Microsoft published CVE - 2026 -62754, a Windows Kerberos elevation of privilege vulnerability, on August 11, 2026 , at 7:00 a.m.
2026-09-25 10:08 UTC -
web:www.strix.ai
How severe is CVE-2026-86247 ? Severity scoring for CVE-2026-86247 is pending analysis. How do I fix CVE-2026-86247 ? Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
2026-09-25 10:08 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2026-86247.json.
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