CVE-2026-43513

highpriority · track · 0EPSS 0.005 · 42 %ileDEEUNLRUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.50% (42nd) EPSS

CVSS 7.5 · high

Is it mine?

83 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · osv

EPSS · scored 2026-10-22

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.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.5

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · FSTEC (BDU) RU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondaryexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · OSV

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · NCSC-NL NL

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-178USCWE-178USCWE-178USCWE-178US

affected products (83)

Products and version ranges known to be affected.

Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
Atlassian Atlassian Bamboo Data Center LTS <10.2.22≤ Data Center LTS <10.2.22cert_bundDE
Atlassian Atlassian Bamboo Data Center LTS <12.1.10≤ Data Center LTS <12.1.10cert_bundDE
Atlassian Atlassian Bitbucket Data Center <10.4.2≤ Data Center <10.4.2cert_bundDE
Atlassian Atlassian Bitbucket Data Center LTS <10.2.6≤ Data Center LTS <10.2.6cert_bundDE
Atlassian Atlassian Bitbucket Data Center LTS <9.4.23≤ Data Center LTS <9.4.23cert_bundDE
Atlassian Atlassian Confluence Data Center LTS <10.2.15≤ Data Center LTS <10.2.15cert_bundDE
Atlassian Atlassian Confluence Data Center LTS <9.2.23≤ Data Center LTS <9.2.23cert_bundDE
Atlassian Atlassian Crucible <4.9.13< 4.9.13cert_bundDE
Atlassian Atlassian Fisheye <4.9.13< 4.9.13cert_bundDE
Atlassian Atlassian Jira Data Center LTS <10.3.24≤ Data Center LTS <10.3.24cert_bundDE
Atlassian Atlassian Jira Data Center LTS <11.3.10≤ Data Center LTS <11.3.10cert_bundDE
Atlassian Bamboo≤ Data Center LTS <10.2.22cert_bundDE
Atlassian Bamboo≤ Data Center LTS <12.1.10cert_bundDE
Atlassian Bitbucket≤ Data Center LTS <10.2.6cert_bundDE
Atlassian Bitbucket≤ Data Center LTS <9.4.23cert_bundDE
Atlassian Bitbucket≤ Data Center <10.4.2cert_bundDE
Atlassian Confluence≤ Data Center LTS <9.2.23cert_bundDE
Atlassian Confluence≤ Data Center LTS <10.2.15cert_bundDE
Atlassian Crucible< 4.9.13cert_bundDE

showing 20 of 83

advisories (7)

Vendor and ecosystem advisories describing this.

NCSC-2026-0325Kwetsbaarheden verholpen in Atlassian productenNL2026-08-24csaf · ncsc_nlNL
Atlassian heeft kwetsbaarheden verholpen in diverse producten zoals Bamboo, Bitbucket, Confluence, Jira, Crowd en Fisheye. De kwetsbaarheden bevinden zich in diverse Third-Party producten waar eerder updates voor zijn verschenen. Atlassian heeft deze updates verwerkt in de eigen producten.
WID-SEC-W-2026-1514Apache Tomcat: Mehrere SchwachstellenDeutsch2026-05-12csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Apache Tomcat ausnutzen, um Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, Daten zu manipulieren, einen Denial-of-Service-Zustand herbeizuführen oder andere, nicht spezifizierte bezeichnete Angriffe durchzuführen.
WID-SEC-W-2026-1955Atlassian Bamboo, Bitbucket, Confluence, Fisheye, Crucible, Jira und Jira Service Management: Mehrere SchwachstellenDeutsch2026-06-16csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Atlassian Bamboo, Bitbucket, Confluence, Fisheye, Crucible, Jira und Jira Service Management ausnutzen, um beliebigen Code auszuführen, erweiterte Berechtigungen zu erlangen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren, vertrauliche Informationen offenzulegen oder einen Denial-of-Service-Zustand auszulösen.
WID-SEC-W-2026-2455Oracle Solaris Drittanbieterkomponenten: Mehrere SchwachstellenDeutsch2026-07-21csaf · cert_bundDE
Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in verschiedenen Komponenten von Drittanbietern in Oracle Solaris ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen.
WID-SEC-W-2026-2923Atlassian Produkte (Bamboo, Bitbucket, Confluence, Crucible, Fisheye, und Jira): Mehrere SchwachstellenDeutsch2026-08-18csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Atlassian Bamboo, Atlassian Bitbucket, Atlassian Confluence, Atlassian Crucible, Atlassian Fisheye und Atlassian Jira ausnutzen, um beliebigen Programmcode auszuführen, um einen Denial of Service Angriff durchzuführen, um Informationen offenzulegen, um Dateien zu manipulieren, um einen Cross-Site Scripting Angriff durchzuführen, um einen SQL-Injection Angriff durchzuführen, und um Sicherheitsvorkehrungen zu umgehen.
GHSA-5mp6-jrq3-r938Apache Tomcat: LockOutRealm treats user names as case-sensitive2026-05-12ghsa · osvUS
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.
BIT-tomcat-2026-43513Apache Tomcat: LockOutRealm treats user names as case-sensitive2026-09-11vendor · osvUS
Improper Handling of Case Sensitivity vulnerability in LockOutRealm in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0 through 11.0.21, from 10.1.0 through 10.1.54, from 9.0.0 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.

also known as (6)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu osv cert_bund ncsc_nl NVD CVE.org MITRE

published 2026-05-12modified 2026-09-29

references (5)

External citations — patches, advisories, analysis.

https://nvd.nist.gov/vuln/detail/CVE-2026-43513 cnnvd
https://tomcat.apache.org/download-90.cgiPatchcnnvd
https://lists.apache.org/thread/ytjcgldshj73lcnd1sh95od5hrghwogp enisa_euvd
http://www.openwall.com/lists/oss-security/2026/05/12/9Mailing ListThird Party Advisorynvd
https://lists.apache.org/thread/ytjcgldshj73lcnd1sh95od5hrghwogpMailing ListVendor Advisorynvd

scry

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