Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2026-24733

Severity CVSS v4.0:
Pending analysis
Type:
CWE-20 Input Validation
Publication date:
17/02/2026
Last modified:
11/03/2026

Description

Improper Input Validation vulnerability in Apache Tomcat.<br /> <br /> <br /> Tomcat did not limit HTTP/0.9 requests to the GET method. If a security <br /> constraint was configured to allow HEAD requests to a URI but deny GET <br /> requests, the user could bypass that constraint on GET requests by <br /> sending a (specification invalid) HEAD request using HTTP/0.9.<br /> <br /> <br /> 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.<br /> <br /> <br /> Older, EOL versions are also affected.<br /> <br /> Users are recommended to upgrade to version 11.0.15 or later, 10.1.50 or later or 9.0.113 or later, which fixes the issue.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS v3.1 Severity and Metrics:

Base Score: 3.70 LOW
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): Low
Availability (A): None

Base Score 3.x
3.70
Severity 3.x
LOW

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* 9.0.1 (including) 9.0.113 (excluding)
cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* 10.1.1 (including) 10.1.50 (excluding)
cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* 11.0.1 (including) 11.0.15 (excluding)
cpe:2.3:a:apache:tomcat:9.0.0:milestone1:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone10:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone11:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone12:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone13:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone14:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone15:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone16:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone17:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone18:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone19:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone2:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools