6.5

CVE-2026-24733: apache software foundation apache tomcat Improper Input Validation

CVSS: 6.5v3.1MediumModified
AliasesSUSE-SU-2026:0922-1UBUNTU-CVE-2026-24733DEBIAN-CVE-2026-24733
Published 17-02-2026Last modified 11-03-2026
Open JSON

Vulnerability summary

CVE-2026-24733 is a medium (CVSS 6.5) Improper Input Validation vulnerability in apache software foundation apache tomcat. EPSS estimates a 0.55% chance of exploitation in the next 30 days, higher than 44.9% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.55%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 25 · Related 13
DSA-6120-1DSA-6121-1MGASA-2026-0056OPENSUSE-SU-2026:10305-1OPENSUSE-SU-2026:10306-1OPENSUSE-SU-2026:10307-1

Timeline

  1. 17-02-2026
    PublishedVulnerability first disclosed.
  2. 11-03-2026
    Last modifiedVulnerability 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

7 scores · 7 sources · 2 versions

EPSS trend

Probability

0.55%

Chance of exploitation in the next 30 days

Percentile

45%

Versus all other CVEs

30-day change

+0.04 pp

From 0.51% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.55%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard17 products
  • kayenta-2025.0< 2025.0.8-r9
  • kayenta-2025.1< 2025.1.6-r7
  • kayenta-2025.2< 2025.2.4-r3
  • kayenta-2025.4< 2025.4.3-r2
  • kayenta-2026.0< 2026.0.2-r2
Ubuntu4 products
  • tomcat10All versions (No fix recorded)
  • tomcat11All versions (No fix recorded)
  • tomcat6All versions (No fix recorded)
  • tomcat9All versions (No fix recorded)
Debian3 products
  • tomcat10< 10.1.52-1~deb12u1 | < 10.1.52-1~deb13u1 | < 10.1.52-1
  • tomcat11< 11.0.15-1~deb13u1 | < 11.0.15-1
  • tomcat9< 9.0.70-2
Wolfi2 products
  • thingsboard-tb-mqtt-transport< 4.3.1-r2 | < 4.3.0.1-r1
  • thingsboard-tb-node< 4.3.1-r2
Apache1 product
  • tomcatEOL≥ 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
Apache software foundation1 product
  • 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
Org.apache.tomcat1 product
  • tomcat-coyote≥ 11.0.0-M1, < 11.0.15 | ≥ 10.1.0-M1, < 10.1.50 | < 9.0.113
Suse1 product
  • tomcat&distro=SUSE Linux Enterprise Server LTSS Extended Security 12 SP5< 9.0.36-3.156.1

8 vendors · 30 products

References

16 links
Show all 16 references