WaratekVRT Sign in

CVE-2026-24733 Apache Tomcat

Affected softwareApache Tomcat
Severity6.5 Medium CVSS 3.1 2 scores
Fixed in11.0.15, 10.1.50, 9.0.113
WeaknessImproper input validation (CWE-20)
Published17 Feb 2026
Updated17 Jun 2026

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.

Exploitation status

No public exploit

No exploit has been reported in the sources we check. The 1 repository below are public GitHub repositories with fewer than 5 stars.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment exploitation: none
  • Indexed PoC 1 indexed, none at 5+ stars
  • EPSS 0.59% chance in 30 days

1 of these are GitHub repositories with fewer than 5 stars. They are listed for reference and don't count toward the exploitation status above.

IndexArtifactStarsFirst seen
GitHub PoC ## What is CVE-2026-24733? Apache Tomcat incorrectly handled an HTTP/0.9-style `HEAD` request under certain security-constraint configurations. 1 2026-09-15

Waratek protection

No exploit published

Within Waratek scope. In the sources we check, nobody has published exploit code for this CVE or reported it being exploited.

A public code fix exists: apache/tomcat 2e2fa23.

  • Protection none
  • Action unverified
  • Review automated Upstream data
  • Record active
Decided by Exploit code for this candidate, published in a reviewed catalogue or a GitHub repository with 5 or more stars, or in use per CISA or VulnCheck; not only a CISA verdict, a forecast, or nothing at all
Finding This CVE is not listed in CISA KEV or VulnCheck KEV, CISA Vulnrichment records no active exploitation, no reviewed exploit catalogue carries an entry for it, and no GitHub PoC repository for it has 5 or more stars. Nobody has published exploit code worth tracing, so it is not a candidate for a rule ahead of the ones where somebody has; an upstream fix path does exist, so the remediation half of the candidacy still holds. This is a statement about what has been published, not about whether the defect is reachable or serious.

CVSS

6.5 MEDIUM v3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N 2 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

VersionScoreBandVectorAssignerType
CVSS 3.1 6.5 MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N CISA-ADP Secondary published
CVSS 3.1 3.7 LOW CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N NVD Primary

Affected software and releases

Oracle advisories

AdvisoryTypeQuarterProducts Oracle names in its risk matrix
Oracle Critical Patch Update October 2026 ↗ CPU 2026-Q4 Oracle Communications / Microservices (Apache Tomcat) (7.0.0)
Oracle Siebel CRM / Application Interface (Apache Tomcat) (17.0-26.9)
Oracle Critical Patch Update April 2026 ↗ CPU 2026-Q2 Oracle Communications / Core (Apache Tomcat) (6.1.1-7.0.0)

Oracle components and versions

FamilyComponentVersions, as Oracle lists themRead as
Oracle Communications Core (Apache Tomcat) 6.1.1-7.0.0
Oracle Communications Microservices (Apache Tomcat) 7.0.0 7.0.0
Oracle Siebel CRM Application Interface (Apache Tomcat) 17.0-26.9

Maven packages

Affected and fixed versions, from OSV.dev
PackageIntroducedFixedLast affected
org.apache.tomcat:tomcat-coyote 11.0.0-M1 11.0.15 unbounded
org.apache.tomcat:tomcat-coyote 10.1.0-M1 10.1.50 unbounded
org.apache.tomcat:tomcat-coyote 0 9.0.113 unbounded

Products and versions

2 products, 69 version entries
SourceVendorProductSchemeAffected versions
nvd apache tomcat generic 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 · ≥ 9.0.1 and < 9.0.113 · 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 · ≥ 10.1.1 and < 10.1.50 · 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 · ≥ 11.0.1 and < 11.0.15
osv org.apache.tomcat tomcat-coyote generic < 9.0.113 · ≥ 10.1.0 and < 10.1.50 · ≥ 11.0.0 and < 11.0.15

References

URLTags
https://github.com/apache/tomcat/commit/2e2fa23f2635bbb819759576a2f2f5e64ecf7c5f WEB
https://github.com/apache/tomcat/commit/6c73d74ff281260d74c836370ff6b82f1da8048b WEB
https://github.com/apache/tomcat/commit/711b465cf22684a1acf0cb43501cdbbce9b6c5f4 WEB
https://github.com/apache/tomcat PACKAGE
https://lists.apache.org/thread/6xk3t65qpn1myp618krtfotbjn1qt90f WEB
https://tomcat.apache.org/security-10.html WEB
https://tomcat.apache.org/security-11.html WEB
https://tomcat.apache.org/security-9.html WEB

Timeline

Published2026-02-17By the CVE Program.
NVD record modified2026-06-17NVD's own last-modified date for this record.