CVE-2026-43513
Apache Tomcat: LockOutRealm treats user names as case-sensitive
HIGH 7.5
At a glance
- Source
- NVD
- EPSS
- EPSS 0.50 % · percentile 43 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- apache
- NVD status
- Analyzed
Description
Improper Handling of Case Sensitivity vulnerability in LockOutRealm in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Older unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118 which fix the issue.
Weaknesses (CWE)
- CWE-178 — Improper Handling of Case Sensitivity
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N | CISA-ADP |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N | NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) |
Advisories
- GHSA-5mp6-jrq3-r938 — Apache Tomcat: LockOutRealm treats user names as case-sensitive
European references
- ENISA EUVD · EUVD-2026-29517
- GCVE · GCVE-0-2026-43513
CERT-FR advisories
- CERTFR-2026-AVI-1165 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0986 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0773 — Multiples vulnérabilités dans les produits Atlassian · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0577 — Multiples vulnérabilités dans Apache Tomcat · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*≥ 7.0.0 ≤ 7.0.109cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*≥ 8.5.0 ≤ 8.5.100cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*≥ 9.0.0 < 9.0.118cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*≥ 10.1.0 < 10.1.55cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*≥ 11.0.0 < 11.0.22
Affected products
| Product | Versions |
|---|---|
| Apache Software Foundation · Apache Tomcat | affected 11.0.0-M1 ≤ 11.0.21 ; affected 10.1.0-M1 ≤ 10.1.54 ; affected 9.0.0.M1 ≤ 9.0.117 ; affected 8.5.0 ≤ 8.5.100 ; affected 7.0.0 ≤ 7.0.109 ; unknown 0 < 7.00 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |