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Apache Tomcat 10.1.0-M1 < 10.1.55 Multiple Vulnerabilities

critical Web App Scanning Plugin ID 115239

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Synopsis

Apache Tomcat 10.1.0-M1 < 10.1.55 Multiple Vulnerabilities

Description

The version of Apache Tomcat installed on the remote host is 9.0.0-M1 prior to 9.0.118, 10.1.0-M1 prior to 10.1.55 or 11.0.0-M1 prior to 11.0.22. It is, therefore, affected by multiple vulnerabilities :

 - When multiple security constraints defined an HTTP method constraint for the same extension pattern, only the first method constraint was applied. (CVE-2026-43515)

 - The AJP secret was compared in non-constant time allowing an attacker on the local network to mount a timing attack to determine the AJP secret. (CVE-2026-43514)

 - The LockOut Realm treated user names as case sensitive, reducing effectiveness at blocking brute force attacks against a user's password in Realms where the user name was case insensitive. (CVE-2026-43513)

 - When DIGEST authentication was configured, any user not known to the configured Realm would be authenticated if they presented the password 'null'. (CVE-2026-43512)

 - If a WebSocket request was redirected after authentication, Tomcat's WebSocket client would present the most recent authentication header to the redirect target host. (CVE-2026-42498)

 - HTTP/2 request headers were not validated, which may trigger unexpected application behavior if the application assumed header values exposed through the Servlet API would be specification compliant. (CVE-2026-41293)

 - No limit was enforced on the request body for WebDAV LOCK or PROPFIND requests available to unauthenticated users. (CVE-2026-41284)

Note that the scanner has not attempted to exploit these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Apache Tomcat version 10.1.55 or later.

See Also

https://tomcat.apache.org/security-10.html#Fixed_in_Apache_Tomcat_10.1.55

Plugin Details

Severity: Critical

ID: 115239

Type: Version Based

Published: 5/20/2026

Updated: 5/20/2026

Scan Template: api, basic, full, pci, scan

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Critical

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-41293

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS Score Source: CVE-2026-41293

Vulnerability Information

CPE: cpe:2.3:a:apache_software_foundation:tomcat:*:*:*:*:*:*:*:*

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 5/4/2026

Reference Information

CVE: CVE-2026-41284, CVE-2026-41293, CVE-2026-42498, CVE-2026-43512, CVE-2026-43513, CVE-2026-43514, CVE-2026-43515

CWE: 178, 20, 200, 208, 285, 592, 770

OWASP: 2010-A3, 2010-A4, 2010-A6, 2013-A2, 2013-A4, 2013-A5, 2013-A9, 2017-A2, 2017-A5, 2017-A6, 2017-A9, 2021-A1, 2021-A3, 2021-A5, 2021-A6, 2021-A7, 2025-A1, 2025-A5, 2025-A6, 2025-A7

WASC: Application Misconfiguration, Denial of Service, Improper Input Handling, Information Leakage, Insufficient Authentication, Insufficient Authorization

CAPEC: 1, 10, 101, 104, 108, 109, 110, 114, 115, 116, 120, 125, 127, 13, 130, 135, 136, 14, 147, 151, 153, 169, 17, 182, 194, 197, 209, 22, 224, 229, 23, 230, 231, 24, 250, 261, 267, 28, 285, 287, 290, 291, 292, 293, 294, 295, 296, 297, 298, 299, 3, 300, 301, 302, 303, 304, 305, 306, 307, 308, 309, 31, 310, 312, 313, 317, 318, 319, 320, 321, 322, 323, 324, 325, 326, 327, 328, 329, 330, 39, 402, 42, 43, 45, 46, 469, 47, 472, 473, 482, 486, 487, 488, 489, 490, 491, 493, 494, 495, 496, 497, 5, 508, 51, 52, 528, 53, 57, 573, 574, 575, 576, 577, 588, 59, 593, 60, 616, 63, 633, 64, 643, 646, 647, 650, 651, 668, 67, 7, 71, 72, 73, 76, 77, 78, 79, 8, 80, 81, 83, 85, 87, 88, 9, 94

DISA STIG: APSC-DV-000460, APSC-DV-000500, APSC-DV-002400, APSC-DV-002560, APSC-DV-002630

HIPAA: 164.306(a)(1), 164.306(a)(2), 164.312(a)(1), 164.312(a)(2)(i)

ISO: 27001-A.12.6.1, 27001-A.13.1.1, 27001-A.14.1.2, 27001-A.14.1.3, 27001-A.14.2.5, 27001-A.18.1.3, 27001-A.6.2.2, 27001-A.9.1.2, 27001-A.9.4.1, 27001-A.9.4.4, 27001-A.9.4.5

NIST: sp800_53-AC-3, sp800_53-CM-6b, sp800_53-SC-5, sp800_53-SI-10, sp800_53-SI-15

OWASP API: 2019-API7, 2023-API8

OWASP ASVS: 4.0.2-14.2.1, 4.0.2-4.1.3, 4.0.2-5.1.3, 4.0.2-8.3.4

PCI-DSS: 3.2-2.2, 3.2-6.2, 3.2-6.5, 3.2-6.5.10, 3.2-6.5.8