Vulnerability DatabaseCVE-2026-86350
Mend.io Vulnerability Database
The largest open source vulnerability database
What is a Vulnerability ID?
New vulnerability? Tell us about it!
CVE-2026-86350
Published:September 23, 2026
Updated:October 14, 2026
Inconsistent interpretation of HTTP/2 requests ('HTTP Request/Response smuggling') vulnerability in Apache Tomcat caused by a regression in fix for CVE-2026-41293 can trigger request header mix-up. This issue affects Apache Tomcat: from 11.0.22 through 11.0.25, from 10.1.55 through 10.1.59, from 9.0.118 through 9.0.121. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
Affected Packages
https://github.com/apache/tomcat.git (GITHUB):
Affected version(s) >=9.0.118 <9.0.122
Fix Suggestion:
Update to version 9.0.122
https://github.com/apache/tomcat.git (GITHUB):
Affected version(s) >=11.0.22 <11.0.26
Fix Suggestion:
Update to version 11.0.26
https://github.com/apache/tomcat.git (GITHUB):
Affected version(s) >=10.1.55 <10.1.60
Fix Suggestion:
Update to version 10.1.60
org.apache.tomcat.experimental:tomcat-embed-programmatic (JAVA):
Affected version(s) >=11.0.22 <11.0.26
Fix Suggestion:
Update to version 11.0.26
org.apache.tomcat.embed:tomcat-embed-core (JAVA):
Affected version(s) >=10.1.55 <10.1.60
Fix Suggestion:
Update to version 10.1.60
org.apache.tomcat:tomcat-coyote (JAVA):
Affected version(s) >=10.1.55 <10.1.60
Fix Suggestion:
Update to version 10.1.60
org.apache.tomcat:tomcat-coyote (JAVA):
Affected version(s) >=11.0.22 <11.0.26
Fix Suggestion:
Update to version 11.0.26
org.apache.tomcat.embed:tomcat-embed-core (JAVA):
Affected version(s) >=9.0.118 <9.0.122
Fix Suggestion:
Update to version 9.0.122
org.apache.tomcat.experimental:tomcat-embed-programmatic (JAVA):
Affected version(s) >=9.0.118 <9.0.122
Fix Suggestion:
Update to version 9.0.122
org.apache.tomcat.embed:tomcat-embed-core (JAVA):
Affected version(s) >=11.0.22 <11.0.26
Fix Suggestion:
Update to version 11.0.26
org.apache.tomcat.experimental:tomcat-embed-programmatic (JAVA):
Affected version(s) >=10.1.55 <10.1.60
Fix Suggestion:
Update to version 10.1.60
org.apache.tomcat:tomcat-coyote (JAVA):
Affected version(s) >=9.0.118 <9.0.122
Fix Suggestion:
Update to version 9.0.122
org.apache.tomcat:tomcat-coyote (JAVA):
Affected version(s) >=8.5.0 <8.5.100-tomcat-8.5.112
Fix Suggestion:
Update to version 8.5.100-tomcat-8.5.112
org.apache.tomcat.embed:tomcat-embed-core (JAVA):
Affected version(s) >=8.5.0 <8.5.100-tomcat-8.5.112
Fix Suggestion:
Update to version 8.5.100-tomcat-8.5.112
Related Resources (2)
https://lists.apache.org/thread/mss45z99lcdd5dtpgcn45dy82f3toswc
https://nvd.nist.gov/vuln/detail/CVE-2026-86350
Do you need more information?
Contact Us
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
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.1
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
CWE-444
EPSS
Base Score:
0.31