CVE-2025-66614

Published Feb 17, 2026

Last updated 3 days ago

Overview

Description
Improper Input Validation vulnerability. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.14, from 10.1.0-M1 through 10.1.49, from 9.0.0-M1 through 9.0.112. 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. Older EOL versions are not affected. Tomcat did not validate that the host name provided via the SNI extension was the same as the host name provided in the HTTP host header field. If Tomcat was configured with more than one virtual host and the TLS configuration for one of those hosts did not require client certificate authentication but another one did, it was possible for a client to bypass the client certificate authentication by sending different host names in the SNI extension and the HTTP host header field. The vulnerability only applies if client certificate authentication is only enforced at the Connector. It does not apply if client certificate authentication is enforced at the web application. Users are recommended to upgrade to version 11.0.15 or later, 10.1.50 or later or 9.0.113 or later, which fix the issue.
Source
security@apache.org
NVD status
Modified
Products
tomcat

Risk scores

CVSS 3.1

Type
Primary
Base score
9.1
Impact score
5.2
Exploitability score
3.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Severity
CRITICAL

Weaknesses

security@apache.org
CWE-20
nvd@nist.gov
CWE-295

Social media

Hype score
Not currently trending
  1. SUSE releases critical Tomcat 11.0.18 security update for SLES and openSUSE, fixing CVE-2025-66614, CVE-2026-24733 and CVE-2026-24734 affecting TLS cert checks and HTTP/0.9 handling. #Vulnerability https://t.co/hdUZTV4Yjb

    @threatcluster

    12 Mar 2026

    122 Impressions

    0 Retweets

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  2. Critical #security update for #Tomcat11 on #SUSE Linux (SUSE-SU-2026:0877-1) patches a CVSS 9.1 client certificate bypass (CVE-2025-66614). Read more: 👉 https://t.co/BMdNLWfWLs #Security https://t.co/cWxLI5K9Zw

    @Cezar_H_Linux

    12 Mar 2026

    122 Impressions

    0 Retweets

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  3. 🚨 #openSUSE Tumbleweed ships Tomcat 9.0.115-1.1, addressing 3 CVEs (CVE-2025-66614, CVE-2026-24733, CVE-2026-24734). Read more: 👉 https://t.co/kFxia0zSz0 #Security https://t.co/aJhl7pQJr3

    @Cezar_H_Linux

    9 Mar 2026

    51 Impressions

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  4. Critical #Tomcat 11 update for openSUSE Tumbleweed. Version 11.0.18-1.1 fixes CVE-2025-66614, CVE-2026-24733, and CVE-2026-24734. Read more: 👉 https://t.co/AmIGMxLe4q #openSUSE https://t.co/HxBRM65MmY

    @Cezar_H_Linux

    9 Mar 2026

    53 Impressions

    0 Retweets

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  5. EasyApache 4 v25.48: • mod_qos → 11.78 • ionCube 15 added (beta for PHP 8.5) • ea-cpanel-tools manifest updated to include ioncube15 • Tomcat 10.1 changelog updated with CVE refs (CVE-2026-24733, CVE-2026-24734, CVE-2025-66614) Full change log: https://t.co/I90mlsRNoX

    @cPanel

    9 Mar 2026

    252 Impressions

    0 Retweets

    2 Likes

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    1 Quote

  6. CVE-2025-66614 Apache Tomcat https://t.co/VPcF7HDHgy #Apache #Tomcat #vulnerability

    @blog_casting

    28 Feb 2026

    97 Impressions

    0 Retweets

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  7. 2026. 2.18 JVNVU#91658988 Apache Tomcatにおける複数の脆弱性(CVE-2025-66614、CVE-2026-24733、CVE-2026-24734) - Japan Vulnerability Notes(JVN) https://t.co/TEY6HywfRh

    @kawn2020

    19 Feb 2026

    53 Impressions

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  8. Apache Tomcatにおける複数の脆弱性(CVE-2025-66614、CVE-2026-24733、CVE-2026-24734) https://t.co/VE6o6aixMe #security #feedly

    @yutuki_r

    19 Feb 2026

    83 Impressions

    1 Retweet

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    1 Reply

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  9. [JVNVU#91658988] Apache Tomcatにおける複数の脆弱性(CVE-2025-66614、CVE-2026-24733、CVE-2026-24734) https://t.co/dDTkaolpHb #jvn #脆弱性 #セキュリティ

    @jpsecuritynews

    19 Feb 2026

    45 Impressions

    0 Retweets

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  10. Apache Tomcatにおける複数の脆弱性(CVE-2025-66614、CVE-2026-24733、CVE-2026-24734) https://t.co/ANZ2iHEDCD #%E6%8A%80%E8%A1%93%E7%B3%BB-%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3 #feedly

    @likecoffee

    18 Feb 2026

    44 Impressions

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  11. 統合版 JPCERT/CC | JVN: Apache Tomcatにおける複数の脆弱性(CVE-2025-66614、CVE-2026-24733、CVE-2026-24734) https://t.co/DGj3c1s7zr #itsec_jp

    @itsec_jp

    18 Feb 2026

    77 Impressions

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  12. [2026/02/18 15:45 公表] Apache Tomcatにおける複数の脆弱性(CVE-2025-66614、CVE-2026-24733、CVE-2026-24734) https://t.co/3XyFvD8IqI

    @jvnjp

    18 Feb 2026

    1185 Impressions

    1 Retweet

    3 Likes

    0 Bookmarks

    0 Replies

    1 Quote

  13. CVE-2025-66614 Apache Tomcat SNI and Host Header Validation Bypass Vulnerability https://t.co/O6XF3vVnZ5

    @VulmonFeeds

    17 Feb 2026

    21 Impressions

    0 Retweets

    1 Like

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Configurations

References

Sources include official advisories and independent security research.