Tomcat
Description
Apache Tomcat is a free and open-source implementation of the Jakarta Servlet, Jakarta Expression Language, and WebSocket technologies. It provides a "pure Java" HTTP web server environment in which Java code can also run. Thus it is a Java web application server, although not a full JEE application server.
Product name
tomcat
Related organizations
CVE-2026-43515 (GCVE-0-2026-43515)
Vulnerability from – Published: 2026-05-12 15:33 – Updated: 2026-06-04 09:57
VLAI
Title
Apache Tomcat: Security constraints not correctly applied
Summary
Improper Authorization vulnerability when multiple method constraints define an HTTP method for the same extension 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.
Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118 which fix the issue.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-285 - Improper Authorization
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/746nxfxod0wsocxtm… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Tomcat |
Affected:
11.0.0-M1 , ≤ 11.0.21
(semver)
Affected: 10.1.0-M1 , ≤ 10.1.54 (semver) Affected: 9.0.0.M1 , ≤ 9.0.117 (semver) Affected: 8.5.0 , ≤ 8.5.100 (semver) Affected: 7.0.0 , ≤ 7.0.109 (semver) Unknown: 0 , < 7.0.0 (semver) |
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CVE-2026-34486 (GCVE-0-2026-34486)
Vulnerability from – Published: 2026-04-09 19:35 – Updated: 2026-05-26 18:16
VLAI
Title
Apache Tomcat: Fix for CVE-2026-29146 allowed bypass of EncryptInterceptor
Summary
Missing Encryption of Sensitive Data vulnerability in Apache Tomcat due to the fix for CVE-2026-29146 allowing the bypass of the EncryptInterceptor.
This issue affects Apache Tomcat: 11.0.20, 10.1.53, 9.0.116.
Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117, which fix the issue.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-311 - Missing Encryption of Sensitive Data
Assigner
References
3 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Tomcat |
Affected:
11.0.20
(semver)
Affected: 10.1.53 (semver) Affected: 9.0.116 (semver) |
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CVE-2026-41293 (GCVE-0-2026-41293)
Vulnerability from – Published: 2026-05-12 15:19 – Updated: 2026-05-14 19:54
VLAI
Title
Apache Tomcat: HTTP/2 request headers not validated
Summary
Improper Input Validation vulnerability 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 10.0.0-M1 through 10.0.27.
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Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-20 - Improper Input Validation
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/qwg0q16z7xkb2qrr8… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… |
Impacted products
1 product
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|---|---|---|---|
| Apache Software Foundation | Apache Tomcat |
Affected:
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(semver)
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CVE-2026-43512 (GCVE-0-2026-43512)
Vulnerability from – Published: 2026-05-12 15:24 – Updated: 2026-05-14 19:53
VLAI
Title
Apache Tomcat: Digest authenticator will authenticate any unknown user
Summary
DEPRECATED: Authentication Bypass Issues vulnerability in digest authentication 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 before 7.0.0.
Older unsupported versions any also be affect
Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118 which fix the issue.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-592 - DEPRECATED: Authentication Bypass Issues
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Tomcat |
Affected:
11.0.0-M1 , ≤ 11.0.21
(semver)
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CVE-2026-43513 (GCVE-0-2026-43513)
Vulnerability from – Published: 2026-05-12 15:26 – Updated: 2026-05-14 19:53
VLAI
Title
Apache Tomcat: LockOutRealm treats user names as case-sensitive
Summary
Improper Handling of Case Sensitivity vulnerability in LockOutRealm in Apache Tomcat.
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Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118 which fix the issue.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-178 - Improper Handling of Case Sensitivity
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Tomcat |
Affected:
11.0.0-M1 , ≤ 11.0.21
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CVE-2026-43514 (GCVE-0-2026-43514)
Vulnerability from – Published: 2026-05-12 15:32 – Updated: 2026-05-13 17:22
VLAI
Title
Apache Tomcat: AJP secret compared in non-constant time
Summary
Observable Timing Discrepancy vulnerability when comparing AJP secret in Apache Tomcat.
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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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-208 - Observable Timing Discrepancy
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/2k654v5cq123npfsd… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… |
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1 product
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Affected:
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CVE-2026-42498 (GCVE-0-2026-42498)
Vulnerability from – Published: 2026-05-12 15:17 – Updated: 2026-05-13 15:59
VLAI
Title
Apache Tomcat: WebSocket authentication header exposure
Summary
Exposure of HTTP Authentication Header to unexpected hosts during WebSocket authentication vulnerability 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 9.0.2 through 9.0.117, from 8.5.24 through 8.5.100, from 7.0.83 through 7.0.109.
Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118, which fix the issue.
Severity
7.3 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-200 - Exposure of HTTP Authentication Header to unexpected hosts
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/n61zwf75jrv09rz90… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… |
Impacted products
1 product
| Vendor | Product | Version | |
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| Apache Software Foundation | Apache Tomcat |
Affected:
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CVE-2026-41284 (GCVE-0-2026-41284)
Vulnerability from – Published: 2026-05-12 15:14 – Updated: 2026-05-13 15:57
VLAI
Title
Apache Tomcat: Unbounded read in WebDAV LOCK and PROPFIND handling
Summary
Allocation of Resources Without Limits or Throttling vulnerability 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.
Older, unsupported versions may also be affected.
Users are recommended to upgrade to version [FIXED_VERSION], which fixes the issue.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/2nvqjr7ovjmvx2vbh… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Tomcat |
Affected:
11.0.0-M1 , ≤ 11.0.21
(semver)
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CVE-2025-61795 (GCVE-0-2025-61795)
Vulnerability from – Published: 2025-10-27 17:30 – Updated: 2026-05-12 12:08
VLAI
Title
Apache Tomcat: Delayed cleaning of multi-part upload temporary files may lead to DoS
Summary
Improper Resource Shutdown or Release vulnerability in Apache Tomcat.
If an error occurred (including exceeding limits) during the processing of a multipart upload, temporary copies of the uploaded parts written to disc were not cleaned up immediately but left for the garbage collection process to delete. Depending on JVM settings, application memory usage and application load, it was possible that space for the temporary copies of uploaded parts would be filled faster than GC cleared it, leading to a DoS.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.11, from 10.1.0-M1 through 10.1.46, from 9.0.0.M1 through 9.0.109.
The following versions were EOL at the time the CVE was created but are
known to be affected: 8.5.0 though 8.5.100. Other, older, EOL versions may also be affected.
Users are recommended to upgrade to version 11.0.12 or later, 10.1.47 or later or 9.0.110 or later which fixes the issue.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-404 - Improper Resource Shutdown or Release
Assigner
References
3 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Tomcat |
Affected:
11.0.0-M1 , ≤ 11.0.11
(semver)
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|
| Siemens | SIMATIC CN 4100 |
Affected:
0 , < V5.0
(custom)
|
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CVE-2025-55754 (GCVE-0-2025-55754)
Vulnerability from – Published: 2025-10-27 17:29 – Updated: 2026-05-12 12:08
VLAI
Title
Apache Tomcat: console manipulation via escape sequences in log messages
Summary
Improper Neutralization of Escape, Meta, or Control Sequences vulnerability in Apache Tomcat.
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This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.10, from 10.1.0-M1 through 10.1.44, from 9.0.40 through 9.0.108.
The following versions were EOL at the time the CVE was created but are
known to be affected: 8.5.60 though 8.5.100. Other, older, EOL versions may also be affected.
Users are recommended to upgrade to version 11.0.11 or later, 10.1.45 or later or 9.0.109 or later, which fix the issue.
Severity
9.6 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-150 - Improper Neutralization of Escape, Meta, or Control Sequences
Assigner
References
3 references
Impacted products
2 products
| Vendor | Product | Version | |
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| Apache Software Foundation | Apache Tomcat |
Affected:
11.0.0-M1 , ≤ 11.0.10
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|
| Siemens | SIMATIC CN 4100 |
Affected:
0 , < V5.0
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"value": "Improper Neutralization of Escape, Meta, or Control Sequences vulnerability in Apache Tomcat.\n\nTomcat did not escape ANSI escape sequences in log messages. If Tomcat was running in a console on a Windows operating system, and the console supported ANSI escape sequences, it was possible for an attacker to use a specially crafted URL to inject ANSI escape sequences to manipulate the console and the clipboard and attempt to trick an administrator into running an attacker controlled command. While no attack vector was found, it may have been possible to mount this attack on other operating systems.\n\n\n\nThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.10, from 10.1.0-M1 through 10.1.44, from 9.0.40 through 9.0.108.\n\nThe following versions were EOL at the time the CVE was created but are \nknown to be affected: 8.5.60 though 8.5.100. Other, older, EOL versions may also be affected.\nUsers are recommended to upgrade to version 11.0.11 or later, 10.1.45 or later or 9.0.109 or later, which fix the issue."
}
],
"metrics": [
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"content": {
"text": "low"
},
"type": "Textual description of severity"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-150",
"description": "CWE-150 Improper Neutralization of Escape, Meta, or Control Sequences",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-10-29T11:38:25.256Z",
"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
"shortName": "apache"
},
"references": [
{
"tags": [
"vendor-advisory"
],
"url": "https://lists.apache.org/thread/j7w54hqbkfcn0xb9xy0wnx8w5nymcbqd"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Apache Tomcat: console manipulation via escape sequences in log messages",
"x_generator": {
"engine": "Vulnogram 0.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
"assignerShortName": "apache",
"cveId": "CVE-2025-55754",
"datePublished": "2025-10-27T17:29:50.756Z",
"dateReserved": "2025-08-15T11:26:40.520Z",
"dateUpdated": "2026-05-12T12:08:28.428Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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