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TI-2026-36982 Aliases CVE-2026-50229GHSA-pg42-rg8c-j886

Apache Tomcat: XSS in number guess example

Priority LOW 34CWE-80Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Partial Red Hat: 10 fixed, 6 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-80.

Summary

Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in the number guess example for Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.0.M1 through 9.0.118, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other versions that have reached end of support may also be affected. Users are recommended to upgrade to version 11.0.23, 10.1.56 or 9.0.119, which fix the issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.04091 90th percentileScored 2026-11-07
Fix Partial org.apache.tomcat:tomcat (Maven): 11.0.23, 10.1.56, 9.0.119Red Hat: 9 advisoriesRed Hat: 10 fixed, 6 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache Tomcat11.0.0-M1 – 11.0.22; 10.1.0-M1 – 10.1.55; 9.0.0.M1 – 9.0.118; 8.5.0 – 8.5.100; 7.0.0 – 7.0.109—No fix listedCNA
—org.apache.tomcat:tomcat (Maven)11.0.0-M1 to before 11.0.2311.0.23Patch availableGHSA-pg42-rg8c-j886
—org.apache.tomcat:tomcat (Maven)10.1.0-M1 to before 10.1.5610.1.56Patch availableGHSA-pg42-rg8c-j886
—org.apache.tomcat:tomcat (Maven)9.0.0.M1 to before 9.0.1199.0.119Patch availableGHSA-pg42-rg8c-j886
—org.apache.tomcat:tomcat (Maven)8.5.0 – 8.5.100—No fix listedGHSA-pg42-rg8c-j886
—org.apache.tomcat:tomcat (Maven)up to 7.0.109—No fix listedGHSA-pg42-rg8c-j886
  • Apache Tomcat VendorApache Affected 11.0.0-M1 – 11.0.22; 10.1.0-M1 – 10.1.55; 9.0.0.M1 – 9.0.118; 8.5.0 – 8.5.100; 7.0.0 – 7.0.109 Fixed in — No fix listed CNA
  • org.apache.tomcat:tomcat (Maven) Vendor— Affected 11.0.0-M1 to before 11.0.23 Fixed in 11.0.23 Patch available GHSA-pg42-rg8c-j886
  • org.apache.tomcat:tomcat (Maven) Vendor— Affected 10.1.0-M1 to before 10.1.56 Fixed in 10.1.56 Patch available GHSA-pg42-rg8c-j886
  • org.apache.tomcat:tomcat (Maven) Vendor— Affected 9.0.0.M1 to before 9.0.119 Fixed in 9.0.119 Patch available GHSA-pg42-rg8c-j886
  • org.apache.tomcat:tomcat (Maven) Vendor— Affected 8.5.0 – 8.5.100 Fixed in — No fix listed GHSA-pg42-rg8c-j886
  • org.apache.tomcat:tomcat (Maven) Vendor— Affected up to 7.0.109 Fixed in — No fix listed GHSA-pg42-rg8c-j886

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*up to 7.0.109; 8.5.0 – 8.5.100; 9.0.0 to before 9.0.119; 10.1.0 to before 10.1.56; 11.0.0 to before 11.0.23VulnerableApache
  • cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* Versions up to 7.0.109; 8.5.0 – 8.5.100; 9.0.0 to before 9.0.119; 10.1.0 to before 10.1.56; 11.0.0 to before 11.0.23 Vulnerable ·Apache

Remediation

  • Fix · GHSA-pg42-rg8c-j886 org.apache.tomcat:tomcat (Maven) Fixed in 11.0.23 Advisory →
  • Fix · GHSA-pg42-rg8c-j886 org.apache.tomcat:tomcat (Maven) Fixed in 10.1.56 Advisory →
  • Fix · GHSA-pg42-rg8c-j886 org.apache.tomcat:tomcat (Maven) Fixed in 9.0.119 Advisory →

Red Hat 9 advisories

  • RHSA-2026:68651 Released 2026-09-18 · Red Hat rating Moderate
    tomcat9 security update
    • Red Hat Enterprise Linux AppStream (v. 10) tomcat9-1:9.0.120-1.el10_2, tomcat9-admin-webapps-1:9.0.120-1.el10_2, tomcat9-docs-webapp-1:9.0.120-1.el10_2 +5
  • RHSA-2026:68677 Released 2026-09-17 · Red Hat rating Important
    tomcat security update
    • Red Hat Enterprise Linux AppStream (v. 8) tomcat-1:9.0.120-1.el8_10, tomcat-admin-webapps-1:9.0.120-1.el8_10, tomcat-docs-webapp-1:9.0.120-1.el8_10 +5
  • RHSA-2026:68660 Released 2026-09-17 · Red Hat rating Moderate
    tomcat security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) tomcat-1:9.0.120-2.el9_8, tomcat-admin-webapps-1:9.0.120-2.el9_8, tomcat-docs-webapp-1:9.0.120-2.el9_8 +5
Show 6 more Red Hat advisories
  • RHSA-2026:68659 Released 2026-09-17 · Red Hat rating Important
    tomcat security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) tomcat-1:9.0.120-1.el9_6, tomcat-admin-webapps-1:9.0.120-1.el9_6, tomcat-docs-webapp-1:9.0.120-1.el9_6 +5
  • RHSA-2026:68678 Released 2026-09-17 · Red Hat rating Important
    tomcat security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) tomcat-1:9.0.120-1.el9_2, tomcat-admin-webapps-1:9.0.120-1.el9_2, tomcat-docs-webapp-1:9.0.120-1.el9_2 +5
  • RHSA-2026:68679 Released 2026-09-17 · Red Hat rating Important
    tomcat security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.4) tomcat-1:9.0.120-1.el9_4, tomcat-admin-webapps-1:9.0.120-1.el9_4, tomcat-docs-webapp-1:9.0.120-1.el9_4 +5
  • RHSA-2026:68680 Released 2026-09-17 · Red Hat rating Important
    tomcat security update
    • Red Hat Enterprise Linux AppStream E4S (v.8.8) tomcat-1:9.0.120-1.el8_8, tomcat-admin-webapps-1:9.0.120-1.el8_8, tomcat-docs-webapp-1:9.0.120-1.el8_8 +5
    • Red Hat Enterprise Linux AppStream TUS (v.8.8) tomcat-1:9.0.120-1.el8_8, tomcat-admin-webapps-1:9.0.120-1.el8_8, tomcat-docs-webapp-1:9.0.120-1.el8_8 +5
  • RHSA-2026:67163 Released 2026-09-14 · Red Hat rating Important
    tomcat9 security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) tomcat9-1:9.0.120-1.el10_0, tomcat9-admin-webapps-1:9.0.120-1.el10_0, tomcat9-docs-webapp-1:9.0.120-1.el10_0 +5
  • RHSA-2026:32960 Released 2026-06-29 · Red Hat rating Critical
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images tomcat11-1:11.0.23-0.1.hum1@noarch@public-hummingbird-aarch64-rpms, tomcat11-1:11.0.23-0.1.hum1@noarch@public-hummingbird-x86_64-rpms, tomcat11-1:11.0.23-0.1.hum1@src +18

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Apache Tomcat 7.0.0

    3 records Highest priority Priority MEDIUM 1 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2026-40363 Apache Tomcat: Authentication bypass with JNDIRealm and GSSAPI authenticated bindPriority MEDIUM 45
    • TI-2026-40362 Apache Tomcat: Security constraints for default servlet ignored methodPriority LOW 36
    Show all 3 records →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 6AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 7AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 8AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred
Red Hat JBoss Web Server 5AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:68651
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:68677
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:68660
Red Hat Enterprise Linux AppStream E4S (v.8.8)Fixed RHSA-2026:68680
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:68678
Red Hat Enterprise Linux AppStream E4S (v.9.4)Fixed RHSA-2026:68679
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:67163
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:68659
Red Hat Enterprise Linux AppStream TUS (v.8.8)Fixed RHSA-2026:68680
Red Hat Hardened ImagesFixed RHSA-2026:32960
Not affected: 3 products
  • Red Hat Hardened Images
  • Red Hat JBoss Web Server 6
  • Red Hat JBoss Web Server 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-50229
  2. 2026-10-03 Alias added: GHSA-pg42-rg8c-j886
  3. 2026-11-04 Fix available: Maven/org.apache.tomcat:[email protected], Maven/org.apache.tomcat:[email protected], Maven/org.apache.tomcat:[email protected] · GHSA-pg42-rg8c-j886
  4. 2026-11-04 CVSS score added · GHSA-pg42-rg8c-j886
  5. 2026-11-04 Weakness changed · GHSA-pg42-rg8c-j886
  6. 2026-11-04 10 new references · GHSA-pg42-rg8c-j886

References

Advisory 3

Other 7

  • TI-2025-18529 Apache Tomcat: Potential RCE and/or information disclosure and/or information corruption with partial PUT KEVCVSS 3.1CRITICAL 10.0
  • TI-2020-01862 Improper privilege management in Apache Tomcat KEVCVSS 3.1CRITICAL 9.8
  • TI-2016-07192 Improper access control in Apache Tomcat KEVCVSS 3.1CRITICAL 9.8
  • TI-2017-09342 Unrestricted file upload in Apache Tomcat KEVCVSS 3.1HIGH 8.1
  • TI-2017-09340 Unrestricted file upload in Apache Tomcat KEVCVSS 3.1HIGH 8.1
  • TI-2026-26741 Apache Tomcat: Fix for CVE-2026-29146 allowed bypass of EncryptInterceptor KEVCVSS 3.1HIGH 7.5
See all 273 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences