CVE-2026-43513

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 v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://lists.apache.org/thread/ytjcgldshj73lcnd1sh95od5hrghwogp	Mailing List Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/05/12/9	Mailing List Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:apache:tomcat::::::::
	cpe:2.3:a:apache:tomcat::::::::
	cpe:2.3:a:apache:tomcat::::::::
	cpe:2.3:a:apache:tomcat::::::::
	cpe:2.3:a:apache:tomcat::::::::

History

26 Oct 2026, 18:10

Type	Values Removed	Values Added
Summary		(es) Vulnerabilidad de manejo inadecuado de la sensibilidad a mayúsculas y minúsculas en LockOutRealm en Apache Tomcat. Este problema afecta a Apache Tomcat: desde 11.0.0-M1 hasta 11.0.21, desde 10.1.0-M1 hasta 10.1.54, desde 9.0.0.M1 hasta 9.0.117, desde 8.5.0 hasta 8.5.100, desde 7.0.0 hasta 7.0.109. Versiones antiguas no compatibles también pueden verse afectadas. Se recomienda a los usuarios actualizar a la versión 11.0.22, 10.1.55 o 9.0.118 que solucionan el problema.

Information

Published : 2026-05-12 16:16

Updated : 2026-10-26 18:10

NVD link : CVE-2026-43513

Mitre link : CVE-2026-43513

CVE.ORG link : CVE-2026-43513

JSON object : View

Products Affected

apache

tomcat

CWE

CWE-178

Improper Handling of Case Sensitivity

{"id": "CVE-2026-43513", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-43513", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-14T16:34:43.121351Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security@apache.org", "affectedData": [{"vendor": "Apache Software Foundation", "product": "Apache Tomcat", "versions": [{"status": "affected", "version": "11.0.0-M1", "versionType": "semver", "lessThanOrEqual": "11.0.21"}, {"status": "affected", "version": "10.1.0-M1", "versionType": "semver", "lessThanOrEqual": "10.1.54"}, {"status": "affected", "version": "9.0.0.M1", "versionType": "semver", "lessThanOrEqual": "9.0.117"}, {"status": "affected", "version": "8.5.0", "versionType": "semver", "lessThanOrEqual": "8.5.100"}, {"status": "affected", "version": "7.0.0", "versionType": "semver", "lessThanOrEqual": "7.0.109"}, {"status": "unknown", "version": "0", "lessThan": "7.00", "versionType": "semver"}], "defaultStatus": "unaffected"}]}], "published": "2026-05-12T16:16:18.177", "references": [{"url": "https://lists.apache.org/thread/ytjcgldshj73lcnd1sh95od5hrghwogp", "tags": ["Mailing List", "Vendor Advisory"], "source": "security@apache.org"}, {"url": "http://www.openwall.com/lists/oss-security/2026/05/12/9", "tags": ["Mailing List", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security@apache.org", "description": [{"lang": "en", "value": "CWE-178"}]}], "descriptions": [{"lang": "en", "value": "Improper Handling of Case Sensitivity vulnerability in LockOutRealm in Apache Tomcat.\n\nThis 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.\nOlder unsupported versions may also be affected.\n\nUsers are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118 which fix the issue."}, {"lang": "es", "value": "Vulnerabilidad de manejo inadecuado de la sensibilidad a may\u00fasculas y min\u00fasculas en LockOutRealm en Apache Tomcat.\n\nEste problema afecta a Apache Tomcat: desde 11.0.0-M1 hasta 11.0.21, desde 10.1.0-M1 hasta 10.1.54, desde 9.0.0.M1 hasta 9.0.117, desde 8.5.0 hasta 8.5.100, desde 7.0.0 hasta 7.0.109.\nVersiones antiguas no compatibles tambi\u00e9n pueden verse afectadas.\n\nSe recomienda a los usuarios actualizar a la versi\u00f3n 11.0.22, 10.1.55 o 9.0.118 que solucionan el problema."}], "lastModified": "2026-10-26T18:10:00.173", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5BE0EC99-5BCD-4F7F-8124-4A1734B7BF6B", "versionEndIncluding": "7.0.109", "versionStartIncluding": "7.0.0"}, {"criteria": "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FF43D0D7-FBF3-4D7A-84C4-47B65A75A524", "versionEndIncluding": "8.5.100", "versionStartIncluding": "8.5.0"}, {"criteria": "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1E5A897C-91F4-449E-984C-7D693B137EED", "versionEndExcluding": "9.0.118", "versionStartIncluding": "9.0.0"}, {"criteria": "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5F289287-8587-4BB3-B4AB-3B5CF4A7D27A", "versionEndExcluding": "10.1.55", "versionStartIncluding": "10.1.0"}, {"criteria": "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "03FB799D-A66F-4792-A0CF-16D67BB53F08", "versionEndExcluding": "11.0.22", "versionStartIncluding": "11.0.0"}], "operator": "OR"}]}], "sourceIdentifier": "security@apache.org"}