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CVE-2025-66614 Apache Tomcat

Affected softwareApache Tomcat
Severity9.1 Critical CVSS 3.1 2 scores
Fixed in11.0.15, 10.1.50, 9.0.113
WeaknessImproper input validation (CWE-20)
Published17 Feb 2026
Updated17 Jun 2026

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.

CWE-295

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 0.29% 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 152c148.

  • 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.

CVSS

9.1 CRITICAL v3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N 2 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

VersionScoreBandVectorAssignerType
CVSS 3.1 9.1 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N NVD Primary published
CVSS 3.1 7.6 HIGH CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L CISA-ADP Secondary

Affected software and releases

Oracle advisories

AdvisoryTypeQuarterProducts Oracle names in its risk matrix
Oracle Critical Patch Update July 2026 ↗ CPU 2026-Q3 Oracle Siebel CRM / EAI (Apache Tomcat) (17.0-26.5)
Oracle Critical Patch Update April 2026 ↗ CPU 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 Siebel CRM EAI (Apache Tomcat) 17.0-26.5

Maven packages

Affected and fixed versions, from OSV.dev
PackageIntroducedFixedLast affected
org.apache.tomcat.embed:tomcat-embed-core 11.0.0-M1 11.0.15 unbounded
org.apache.tomcat.embed:tomcat-embed-core 10.1.0-M1 10.1.50 unbounded
org.apache.tomcat.embed:tomcat-embed-core 9.0.0-M1 9.0.113 unbounded
org.apache.tomcat:tomcat 11.0.0-M1 11.0.15 unbounded
org.apache.tomcat:tomcat 10.1.0-M1 10.1.50 unbounded
org.apache.tomcat:tomcat 9.0.0-M1 9.0.113 unbounded
org.apache.tomcat:tomcat-coyote 11.0.0-M1 11.0.15 unbounded
org.apache.tomcat:tomcat-coyote 10.1.0-M1 10.1.50 unbounded
org.apache.tomcat:tomcat-coyote 9.0.0-M1 9.0.113 unbounded
org.apache.tomcat.embed:tomcat-embed-core 8.5.0 none 8.5.100
org.apache.tomcat:tomcat 8.5.0 none 8.5.100
org.apache.tomcat:tomcat-coyote 8.5.0 none 8.5.100

Products and versions

4 products, 88 version entries
SourceVendorProductSchemeAffected versions
nvd apache tomcat generic 9.0.0:milestone1 · 9.0.0:milestone10 · 9.0.0:milestone11 · 9.0.0:milestone12 · 9.0.0:milestone13 · 9.0.0:milestone14 · 9.0.0:milestone15 · 9.0.0:milestone16 · 9.0.0:milestone17 · 9.0.0:milestone18 · 9.0.0:milestone19 · 9.0.0:milestone2 · 9.0.0:milestone20 · 9.0.0:milestone21 · 9.0.0:milestone22 · 9.0.0:milestone23 · 9.0.0:milestone24 · 9.0.0:milestone25 · 9.0.0:milestone26 · 9.0.0:milestone27 · 9.0.0:milestone3 · 9.0.0:milestone4 · 9.0.0:milestone5 · 9.0.0:milestone6 · 9.0.0:milestone7 · 9.0.0:milestone8 · 9.0.0:milestone9 · ≥ 9.0.1 and < 9.0.113 · 10.1.0:milestone1 · 10.1.0:milestone10 · 10.1.0:milestone11 · 10.1.0:milestone12 · 10.1.0:milestone13 · 10.1.0:milestone14 · 10.1.0:milestone15 · 10.1.0:milestone16 · 10.1.0:milestone17 · 10.1.0:milestone18 · 10.1.0:milestone19 · 10.1.0:milestone2 · 10.1.0:milestone20 · 10.1.0:milestone3 · 10.1.0:milestone4 · 10.1.0:milestone5 · 10.1.0:milestone6 · 10.1.0:milestone7 · 10.1.0:milestone8 · 10.1.0:milestone9 · ≥ 10.1.1 and < 10.1.50 · 11.0.0:milestone1 · 11.0.0:milestone10 · 11.0.0:milestone11 · 11.0.0:milestone12 · 11.0.0:milestone13 · 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:milestone2 · 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 · 11.0.0:milestone3 · 11.0.0:milestone4 · 11.0.0:milestone5 · 11.0.0:milestone6 · 11.0.0:milestone7 · 11.0.0:milestone8 · 11.0.0:milestone9 · ≥ 11.0.1 and < 11.0.15
osv org.apache.tomcat tomcat generic ≥ 8.5.0 and ≤ 8.5.100 · ≥ 9.0.0 and < 9.0.113 · ≥ 10.1.0 and < 10.1.50 · ≥ 11.0.0 and < 11.0.15
osv org.apache.tomcat tomcat-coyote generic ≥ 8.5.0 and ≤ 8.5.100 · ≥ 9.0.0 and < 9.0.113 · ≥ 10.1.0 and < 10.1.50 · ≥ 11.0.0 and < 11.0.15
osv org.apache.tomcat.embed tomcat-embed-core generic ≥ 8.5.0 and ≤ 8.5.100 · ≥ 9.0.0 and < 9.0.113 · ≥ 10.1.0 and < 10.1.50 · ≥ 11.0.0 and < 11.0.15

References

URLTags
https://github.com/apache/tomcat/commit/152c14885d45f5e0a8b59bd9f93c289cfe20ce30 WEB
https://github.com/apache/tomcat/commit/258a591b61f8cf5c22109e21e5a2a38b63454fd2 WEB
https://github.com/apache/tomcat/commit/5053fa82a1b2b52756810601227984a8b71888a4 WEB
https://github.com/apache/tomcat/commit/9276b5e783c8cd5b3fe2bb716306b65004bdd940 WEB
https://github.com/apache/tomcat/commit/972f9a5e2a07674d92610c478aac1b205d60724e WEB
https://github.com/apache/tomcat/commit/a4aa74232e826028cd2f7ba0445caf8a8b52c509 WEB
https://github.com/apache/tomcat PACKAGE
https://lists.apache.org/thread/vw6lxtlh2qbqwpb61wd3sv1flm2nttw7 WEB
https://tomcat.apache.org/security-10.html WEB
https://tomcat.apache.org/security-11.html WEB

Timeline

Published2026-02-17By the CVE Program.
NVD record modified2026-06-17NVD's own last-modified date for this record.