Vulnerability DatabaseCVE-2026-65637
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CVE-2026-65637
Published:August 25, 2026
Updated:September 24, 2026
Improper Input Validation vulnerability in Apache Tomcat due to incomplete fix for CVE-2026-32990. This issue affects Apache Tomcat: from 11.0.20 through 11.0.24, from 10.1.53 through 10.1.57, from 9.0.115 through 9.0.120. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.
Affected Packages
https://github.com/apache/tomcat.git (GITHUB):
Affected version(s) >=10.1.53 <10.1.58
Fix Suggestion:
Update to version 10.1.58
https://github.com/apache/tomcat.git (GITHUB):
Affected version(s) >=9.0.115 <9.0.121
Fix Suggestion:
Update to version 9.0.121
https://github.com/apache/tomcat.git (GITHUB):
Affected version(s) >=11.0.20 <11.0.25
Fix Suggestion:
Update to version 11.0.25
org.apache.tomcat.embed:tomcat-embed-core (JAVA):
Affected version(s) >=10.1.53 <10.1.59
Fix Suggestion:
Update to version 10.1.59
org.apache.tomcat.embed:tomcat-embed-core (JAVA):
Affected version(s) >=11.0.20 <11.0.25
Fix Suggestion:
Update to version 11.0.25
org.apache.tomcat:tomcat-coyote (JAVA):
Affected version(s) >=11.0.20 <11.0.25
Fix Suggestion:
Update to version 11.0.25
org.apache.tomcat.embed:tomcat-embed-core (JAVA):
Affected version(s) >=9.0.115 <9.0.121
Fix Suggestion:
Update to version 9.0.121
org.apache.tomcat:tomcat-coyote (JAVA):
Affected version(s) >=9.0.115 <9.0.121
Fix Suggestion:
Update to version 9.0.121
org.apache.tomcat:tomcat-coyote (JAVA):
Affected version(s) >=10.1.53 <10.1.59
Fix Suggestion:
Update to version 10.1.59
Related Resources (4)
https://lists.apache.org/thread/djog953z1ohsyt25bdvhfzbmsy22vgcj
https://nvd.nist.gov/vuln/detail/CVE-2026-65637
http://www.openwall.com/lists/oss-security/2026/08/26/3
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/65xxx/CVE-2026-65637.json
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CVSS v4
Base Score:
9.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Improper Input Validation
CWE-20
EPSS
Base Score:
0.75