CVE-2026-24733

Aliases:GHSA-qq5r-98hh-rxc9BIT-tomcat-2026-24733UBUNTU-CVE-2026-24733DEBIAN-CVE-2026-24733
Advisory lineage Upstream: 0 Downstream: 22
Modified
Published: 17 Feb 2026, 18:50
Last modified:11 Mar 2026, 15:19

Vulnerability Summary

Overall Risk (default)
medium
26/100
CVSS Score
6.5 MEDIUM
v3.1 (cve.org)
EPSS Score
0.49% LOW
0% probability +0.33%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

17 Feb 2026, 18:50
Published
Vulnerability first disclosed
11 Mar 2026, 15:19
Last Modified
Vulnerability information updated

Description

Improper Input Validation vulnerability in Apache Tomcat. Tomcat did not limit HTTP/0.9 requests to the GET method. If a security constraint was configured to allow HEAD requests to a URI but deny GET requests, the user could bypass that constraint on GET requests by sending a (specification invalid) HEAD request using HTTP/0.9. 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. Older, EOL versions are also affected. 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.

CVSS Metrics

  • v4.0•MEDIUM•Score: 6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U
  • v3.1•MEDIUM•Score: 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
  • v3.1•LOW•Score: 3.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS Trends

Current EPSS score: 0.49%• Percentile: 41%

Techniques & Countermeasures

  • CWE-20•Improper Input Validation

    The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Affected Systems

  • apache software foundation•apache tomcat

    ≥ 11.0.0-M1, ≤ 11.0.14 | ≥ 10.1.0-M1, ≤ 10.1.49 | ≥ 9.0.0.M1, ≤ 9.0.112 | ≤ 8.5.100

  • apache•tomcat

    ≥ 9.0.1, < 9.0.113 | ≥ 10.1.1, < 10.1.50 | ≥ 11.0.1, < 11.0.15 | 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 | 10.0.0:milestone1 | 10.0.0:milestone10 | 10.0.0:milestone2 | 10.0.0:milestone3 | 10.0.0:milestone4 | 10.0.0:milestone5 | 10.0.0:milestone6 | 10.0.0:milestone7 | 10.0.0:milestone8 | 10.0.0:milestone9 | 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

  • debian•tomcat10

    < 10.1.52-1~deb12u1 | < 10.1.52-1~deb13u1 | < 10.1.52-1

  • debian•tomcat11

    < 11.0.15-1~deb13u1 | < 11.0.15-1

  • debian•tomcat9

    < 9.0.70-2 | < 9.0.70-2 | < 9.0.70-2 | < 9.0.70-2

  • ubuntu•tomcat10

    all | all | all

  • ubuntu•tomcat11

    all

  • ubuntu•tomcat6

    all

  • ubuntu•tomcat9

    all | all | all

  • org.apache.tomcat•tomcat

    ≥ 11.0.0-M1, < 11.0.14 | ≥ 10.1.0-M1, < 10.1.49 | < 9.0.112 | ≥ 11.0.0-M1, < 11.0.15 | ≥ 10.1.0-M1, < 10.1.50 | < 9.0.113

  • org.apache.tomcat•tomcat-catalina

    ≥ 11.0.0-M1, < 11.0.14 | ≥ 10.1.0-M1, < 10.1.49 | < 9.0.112 | ≥ 11.0.0-M1, < 11.0.15 | ≥ 10.1.0-M1, < 10.1.50 | < 9.0.113

  • org.apache.tomcat•tomcat-coyote

    ≥ 11.0.0-M1, < 11.0.15 | ≥ 10.1.0-M1, < 10.1.50 | < 9.0.113

  • org.apache.tomcat.embed•tomcat-embed-core

    ≥ 11.0.0-M1, < 11.0.14 | ≥ 10.1.0-M1, < 10.1.49 | < 9.0.112 | ≥ 11.0.0-M1, < 11.0.15 | ≥ 10.1.0-M1, < 10.1.50 | < 9.0.113

References (12)