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281 vulnerabilities found for Apache Tomcat by Apache Software Foundation
CVE-2026-87022 (GCVE-0-2026-87022)
Vulnerability from nvd – Published: 2026-09-23 11:32 – Updated: 2026-09-23 18:10
VLAI
EPSS
VEX
Title
Apache Tomcat: WebSocket message smuggling with per-message-deflate
Summary
Improper handling of length parameter inconsistency vulnerability in Apache Tomcat allows WebSocket message smuggling when per-message-deflate is used.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M1 through 9.0.121.
The following versions were EOS at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.56 through 7.0.109. Other unsupported versions may also be affected.
Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.1.22, which fix the issue.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 14:27 UTC
CWE
- CWE-130 - Improper handling of length parameter inconsistency
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/ypvlkjqsq0480fnk9… | 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 , ≤ 11.0.25
(semver)
Affected: 10.1.0-M1 , ≤ 10.1.59 (semver) Affected: 9.0.0.M1 , ≤ 9.0.121 (semver) Affected: 8.5.0 , ≤ 8.5.100 (semver) Affected: 7.0.56 , ≤ 7.0.109 (semver) |
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CVE-2026-86350 (GCVE-0-2026-86350)
Vulnerability from nvd – Published: 2026-09-23 11:31 – Updated: 2026-09-23 16:17
VLAI
EPSS
VEX
Title
Apache Tomcat: Regression in fix for CVE-2026-41293 can trigger request header mix-up
Summary
Inconsistent interpretation of HTTP/2 requests ('HTTP Request/Response smuggling') vulnerability in Apache Tomcat caused by a regression in fix for CVE-2026-41293 can trigger request header mix-up.
This issue affects Apache Tomcat: from 11.0.22 through 11.0.25, from 10.1.55 through 10.1.59, from 9.0.118 through 9.0.121.
Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 16:16 UTC
CWE
- CWE-444 - Inconsistent interpretation of HTTP requests ('HTTP Request/Response smuggling')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/mss45z99lcdd5dtpg… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Tomcat |
Affected:
11.0.22 , ≤ 11.0.25
(semver)
Affected: 10.1.55 , ≤ 10.1.59 (semver) Affected: 9.0.118 , ≤ 9.0.121 (semver) |
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CVE-2026-86248 (GCVE-0-2026-86248)
Vulnerability from nvd – Published: 2026-09-23 11:29 – Updated: 2026-09-23 16:14
VLAI
EPSS
VEX
Title
Apache Tomcat: Fix for CVE-2026-34500 was incomplete. OCSP checks sometimes soft-fail with FFM even when soft-fail is disabled
Summary
CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled vulnerability in Apache Tomcat.
This issue affects Apache Tomcat: from 11.0.0-M14 through 11.0.25, from 10.1.22 through 10.1.59, from 9.0.92 through 9.0.121.
Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 16:14 UTC
CWE
- CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled
- CWE-287 - Improper Authentication
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/nmkmjp9l53y8h3oc4… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Tomcat |
Affected:
11.0.0-M14 , ≤ 11.0.25
(semver)
Affected: 10.1.22 , ≤ 10.1.59 (semver) Affected: 9.0.92 , ≤ 9.0.121 (semver) |
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CVE-2026-79677 (GCVE-0-2026-79677)
Vulnerability from nvd – Published: 2026-09-23 11:28 – Updated: 2026-09-23 18:10
VLAI
EPSS
VEX
Title
Apache Tomcat: WebSocket DoS due to lost asynchronous write timeout
Summary
Missing release of resource after effective lifetime, Comparison using wrong factors vulnerability in Apache Tomcat allows a denial of service as a result of lost time outs for asynchronous WebSocket writes.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M1 through 9.0.121.
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Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 16:05 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/bzwps6ck4szf2hmks… | 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 , ≤ 11.0.25
(semver)
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CVE-2026-78437 (GCVE-0-2026-78437)
Vulnerability from nvd – Published: 2026-09-23 11:26 – Updated: 2026-09-23 18:10
VLAI
EPSS
VEX
Title
Apache Tomcat: HTTP/2 DoS via malformed request
Summary
Incomplete cleanup vulnerability in Apache Tomcat allows a malformed request to potentially (depends on timing) cause one request from another user to fail.
This issue affects Apache Tomcat: from 11.0.19 through 11.0.25, from 10.1.53 through 10.1.59, from 9.0.116 through 9.0.121.
Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
Severity
7.3 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 16:25 UTC
CWE
- CWE-459 - Incomplete cleanup
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/qkmsos3s8chn5053q… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Tomcat |
Affected:
11.0.19 , ≤ 11.0.25
(semver)
Affected: 10.1.53 , ≤ 10.1.59 (semver) Affected: 9.0.116 , ≤ 9.0.121 (semver) Unaffected: 0 , ≤ 8.5.100 (semver) |
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CVE-2026-78383 (GCVE-0-2026-78383)
Vulnerability from nvd – Published: 2026-09-23 11:23 – Updated: 2026-09-23 18:10
VLAI
EPSS
VEX
Title
Apache Tomcat: AJP DoS via missing request body
Summary
Allocation of resources without limits or throttling vulnerability in Apache Tomcat allows an unauthenticated AJP request to pin an AJP processing thread leading to denial of service.
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Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 15:44 UTC
CWE
- CWE-770 - Allocation of resources without limits or throttling
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/tyqcqk99g7ghgk226… | 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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CVE-2026-77791 (GCVE-0-2026-77791)
Vulnerability from nvd – Published: 2026-09-23 11:20 – Updated: 2026-09-23 18:10
VLAI
EPSS
VEX
Title
Apache Tomcat: DoS via busy wait during WebSocket close
Summary
Uncontrolled Resource Consumption vulnerability in Apache Tomcat during sending of WebSocket close message enabled a DoS attack.
This issue affects Apache Tomcat: from 11.0.0-M5 through 11.0.25, from 10.1.8 through 10.1.59, from 9.0.74 through 9.0.121.
The following versions were EOL at the time the CVE was created but are
known to be affected: from 8.5.88 through 8.5.100. Other unsupported versions may also be affected.
Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 12:44 UTC
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/mb1pjjooqytrl6hbv… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… |
Impacted products
1 product
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CVE-2026-77762 (GCVE-0-2026-77762)
Vulnerability from nvd – Published: 2026-09-23 11:19 – Updated: 2026-09-30 14:50
VLAI
EPSS
VEX
Title
Apache Tomcat: Stale HPACK emitter injects trailers into recycled pooled Request
Summary
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') vulnerability in Apache Tomcat allows an attacker to inject trailer fields into another HTTP/2 request.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.39 through 9.0.121.
The following versions were EOL at the time the CVE was created but are
known to be affected: from 8.5.59 through 8.5.100. Other unsupported versions may also be affected.
Users are recommended to upgrade to version 11.0.26, 10.1.60, 9.0.122, which fix the issue.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 15:40 UTC
CWE
- CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/y5r9fvjo7ol24mkoy… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… |
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1 product
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|---|---|---|---|
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Affected:
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CVE-2026-77756 (GCVE-0-2026-77756)
Vulnerability from nvd – Published: 2026-09-23 11:18 – Updated: 2026-09-23 18:10
VLAI
EPSS
VEX
Title
Apache Tomcat: Transfer-Encoding honored for HTTP/1.0 requests
Summary
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') vulnerability in Apache Tomcat caused by processing the transfer-encoding header for an HTTP/1.0 request may allow an attacker to cause one request from another user to fail when Tomcat is located behind a reverse proxy.
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known to be affected: from 8.5.67 through 8.5.100. Other unsupported versions may also be affected.
Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 13:18 UTC
CWE
- CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/bl5b6rxqh3vb2k9bj… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… |
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1 product
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CVE-2026-76183 (GCVE-0-2026-76183)
Vulnerability from nvd – Published: 2026-09-23 11:16 – Updated: 2026-09-30 14:54
VLAI
EPSS
VEX
Title
Apache Tomcat: Bypass of security constraints for WebSocket endpoints
Summary
Authentication Bypass by Alternate Name vulnerability in Apache Tomcat allowed the security constraints for any WebSocket endpoint to be bypassed.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M1 through 9.0.121.
The following versions were EOS at the time the CVE was created but are
known to be affected: from 8.5.0 through 8.5.100, from 7.0.43 through 7.0.109. Other unsupported versions may also be affected.
Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 15:33 UTC
CWE
- CWE-289 - Authentication Bypass by Alternate Name
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/45mxk8nj2q8pkhct6… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… |
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CVE-2026-75973 (GCVE-0-2026-75973)
Vulnerability from nvd – Published: 2026-09-23 11:14 – Updated: 2026-09-23 18:10
VLAI
EPSS
VEX
Title
Apache Tomcat: Cross-context authentication mix-up with Jakarta Authentication configured
Summary
Improper Authentication vulnerability in Apache Tomcat. When Jakarta Authentication was configured with SimpleAuthConfigProvider as the default provider and multiple web application used that provider, the realm for the first web application to authenticate a request would be used for all web applications.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M4 through 9.0.121.
The following versions were EOL at the time the CVE was created but are
known to be affected: from 8.5.0 through 8.5.100. Other unsupported versions may also be affected.
Users are recommended to upgrade to version 11.0.26, 10.1.60, 9.0.122, which fixes the issue.
Severity
7.3 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 15:28 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/njjcdkkzqyzx4n3ff… | 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:
11.0.0-M1 , ≤ 11.0.25
(semver)
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CVE-2026-73581 (GCVE-0-2026-73581)
Vulnerability from nvd – Published: 2026-09-23 11:08 – Updated: 2026-09-30 14:53
VLAI
EPSS
VEX
Title
Apache Tomcat: OpenSSL and OpenSSL-FFM TLS implementations ignore CRLs when certificate uses a keystore
Summary
Improper Check for Certificate Revocation vulnerability in Apache Tomcat. Both the OpenSSL and OpenSSL-FFM TLS implementations ignore CRLs when certificate uses a keystore.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0-M1 through 9.0.121.
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Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 15:19 UTC
CWE
- CWE-299 - Improper Check for Certificate Revocation
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/r0dj3h1pbn4wv96fh… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… |
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1 product
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CVE-2026-73180 (GCVE-0-2026-73180)
Vulnerability from nvd – Published: 2026-08-25 22:01 – Updated: 2026-08-26 18:35
VLAI
EPSS
VEX
Title
Apache Tomcat: Authenticated WebSocket session survives end of HTTP session
Summary
Insufficient Session Expiration vulnerability in Apache Tomcat meant that if the session ID for an authenticated HTTP session was changed after a WebSocket connection had been established under that authenticated HTTP session, the WebSokcet session would not be closed as required by the Jakarta WebSocket specification when the HTTP session ended.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120.
The following versions were EOL at the time the CVE was created but are
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Severity
6.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-26 18:34 UTC
CWE
- CWE-613 - Insufficient Session Expiration
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/3j15vztszpyqss253… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… |
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CVE-2026-68763 (GCVE-0-2026-68763)
Vulnerability from nvd – Published: 2026-08-25 22:00 – Updated: 2026-08-26 18:36
VLAI
EPSS
VEX
Title
Apache Tomcat: DoS via allocation leak in HTTP/2 backlog tracking when a stream is reset
Summary
Uncontrolled Resource Consumption vulnerability in Apache Tomcat via an allocation leak in the HTTP/2 backlog tracking when a stream is reset
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.39 through 9.0.120.
The following versions were EOL at the time the CVE was created but are
known to be affected: from 8.5.59 through 8.5.100. Other unsupported versions may also be affected.
Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-26 18:36 UTC
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
2 references
Impacted products
1 product
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CVE-2026-68569 (GCVE-0-2026-68569)
Vulnerability from nvd – Published: 2026-08-25 21:59 – Updated: 2026-09-21 11:06
VLAI
EPSS
VEX
Title
Apache Tomcat: Principal lookup can fail open in some cases
Summary
Improper Authentication vulnerability in Apache Tomcat meant that in some circumstances (e.g. CLIENT-CERT, SPNEGO) that a user would be authenticated even if the user did not exist in the DataSourceRealm.
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known to be affected: from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other unsupported versions may also be affected.
Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-26 18:38 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
2 references
Impacted products
1 product
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CVE-2026-68525 (GCVE-0-2026-68525)
Vulnerability from nvd – Published: 2026-08-25 21:57 – Updated: 2026-08-26 18:40
VLAI
EPSS
VEX
Title
Apache Tomcat: Redirect after FORM auth may bypass method specific constraints
Summary
Incorrect Authorization vulnerability in Apache Tomcat's FORM authentication process allows the bypassing of a security constraint that limits user has access to a resource POST but not GET.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120.
The following versions were EOL at the time the CVE was created but are
known to be affected: from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other unsupported versions may also be affected.
Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fixes the issue.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-26 18:40 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
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| Apache Software Foundation | Apache Tomcat |
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CVE-2026-66422 (GCVE-0-2026-66422)
Vulnerability from nvd – Published: 2026-08-25 21:55 – Updated: 2026-08-26 18:52
VLAI
EPSS
VEX
Title
Apache Tomcat: Servlet role references can bypass declarative role constraints
Summary
Improper Authorization vulnerability in Apache Tomcat cause by security-role-ref definitions being incorrectly used as role aliases within the Realm in additional to the correct usage with Request.isUserInRole().
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The following versions were EOL at the time the CVE was created but are
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Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-26 18:52 UTC
CWE
- CWE-285 - Improper Authorization
Assigner
References
2 references
Impacted products
1 product
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CVE-2026-65927 (GCVE-0-2026-65927)
Vulnerability from nvd – Published: 2026-08-25 21:53 – Updated: 2026-08-26 15:22
VLAI
EPSS
VEX
Title
Apache Tomcat: RewriteValve [N] restarts at the second rule and may bypass access control
Summary
Off-by-one Error vulnerability in Apache Tomcat impacting the [N] flag on the rewrite valves causes rewrite processing to restart at the second rule rather than the first rule.
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Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-26 15:21 UTC
CWE
- CWE-193 - Off-by-one Error
Assigner
References
2 references
Impacted products
1 product
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Affected:
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CVE-2026-87022 (GCVE-0-2026-87022)
Vulnerability from cvelistv5 – Published: 2026-09-23 11:32 – Updated: 2026-09-23 18:10
VLAI
EPSS
VEX
Title
Apache Tomcat: WebSocket message smuggling with per-message-deflate
Summary
Improper handling of length parameter inconsistency vulnerability in Apache Tomcat allows WebSocket message smuggling when per-message-deflate is used.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M1 through 9.0.121.
The following versions were EOS at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.56 through 7.0.109. Other unsupported versions may also be affected.
Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.1.22, which fix the issue.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 14:27 UTC
CWE
- CWE-130 - Improper handling of length parameter inconsistency
Assigner
References
2 references
| URL | Tags |
|---|---|
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| http://www.openwall.com/lists/oss-security/2026/0… |
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1 product
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CVE-2026-86350 (GCVE-0-2026-86350)
Vulnerability from cvelistv5 – Published: 2026-09-23 11:31 – Updated: 2026-09-23 16:17
VLAI
EPSS
VEX
Title
Apache Tomcat: Regression in fix for CVE-2026-41293 can trigger request header mix-up
Summary
Inconsistent interpretation of HTTP/2 requests ('HTTP Request/Response smuggling') vulnerability in Apache Tomcat caused by a regression in fix for CVE-2026-41293 can trigger request header mix-up.
This issue affects Apache Tomcat: from 11.0.22 through 11.0.25, from 10.1.55 through 10.1.59, from 9.0.118 through 9.0.121.
Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 16:16 UTC
CWE
- CWE-444 - Inconsistent interpretation of HTTP requests ('HTTP Request/Response smuggling')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/mss45z99lcdd5dtpg… | vendor-advisory |
Impacted products
1 product
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| Apache Software Foundation | Apache Tomcat |
Affected:
11.0.22 , ≤ 11.0.25
(semver)
Affected: 10.1.55 , ≤ 10.1.59 (semver) Affected: 9.0.118 , ≤ 9.0.121 (semver) |
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CVE-2026-86248 (GCVE-0-2026-86248)
Vulnerability from cvelistv5 – Published: 2026-09-23 11:29 – Updated: 2026-09-23 16:14
VLAI
EPSS
VEX
Title
Apache Tomcat: Fix for CVE-2026-34500 was incomplete. OCSP checks sometimes soft-fail with FFM even when soft-fail is disabled
Summary
CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled vulnerability in Apache Tomcat.
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Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 16:14 UTC
CWE
- CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled
- CWE-287 - Improper Authentication
Assigner
References
1 reference
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Impacted products
1 product
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Affected:
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CVE-2026-79677 (GCVE-0-2026-79677)
Vulnerability from cvelistv5 – Published: 2026-09-23 11:28 – Updated: 2026-09-23 18:10
VLAI
EPSS
VEX
Title
Apache Tomcat: WebSocket DoS due to lost asynchronous write timeout
Summary
Missing release of resource after effective lifetime, Comparison using wrong factors vulnerability in Apache Tomcat allows a denial of service as a result of lost time outs for asynchronous WebSocket writes.
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Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 16:05 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/bzwps6ck4szf2hmks… | 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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CVE-2026-78437 (GCVE-0-2026-78437)
Vulnerability from cvelistv5 – Published: 2026-09-23 11:26 – Updated: 2026-09-23 18:10
VLAI
EPSS
VEX
Title
Apache Tomcat: HTTP/2 DoS via malformed request
Summary
Incomplete cleanup vulnerability in Apache Tomcat allows a malformed request to potentially (depends on timing) cause one request from another user to fail.
This issue affects Apache Tomcat: from 11.0.19 through 11.0.25, from 10.1.53 through 10.1.59, from 9.0.116 through 9.0.121.
Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
Severity
7.3 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 16:25 UTC
CWE
- CWE-459 - Incomplete cleanup
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/qkmsos3s8chn5053q… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Tomcat |
Affected:
11.0.19 , ≤ 11.0.25
(semver)
Affected: 10.1.53 , ≤ 10.1.59 (semver) Affected: 9.0.116 , ≤ 9.0.121 (semver) Unaffected: 0 , ≤ 8.5.100 (semver) |
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CVE-2026-78383 (GCVE-0-2026-78383)
Vulnerability from cvelistv5 – Published: 2026-09-23 11:23 – Updated: 2026-09-23 18:10
VLAI
EPSS
VEX
Title
Apache Tomcat: AJP DoS via missing request body
Summary
Allocation of resources without limits or throttling vulnerability in Apache Tomcat allows an unauthenticated AJP request to pin an AJP processing thread leading to denial of service.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M1 through 9.0.121.
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Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 15:44 UTC
CWE
- CWE-770 - Allocation of resources without limits or throttling
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/tyqcqk99g7ghgk226… | 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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CVE-2026-77791 (GCVE-0-2026-77791)
Vulnerability from cvelistv5 – Published: 2026-09-23 11:20 – Updated: 2026-09-23 18:10
VLAI
EPSS
VEX
Title
Apache Tomcat: DoS via busy wait during WebSocket close
Summary
Uncontrolled Resource Consumption vulnerability in Apache Tomcat during sending of WebSocket close message enabled a DoS attack.
This issue affects Apache Tomcat: from 11.0.0-M5 through 11.0.25, from 10.1.8 through 10.1.59, from 9.0.74 through 9.0.121.
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Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 12:44 UTC
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/mb1pjjooqytrl6hbv… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… |
Impacted products
1 product
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| Apache Software Foundation | Apache Tomcat |
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CVE-2026-77762 (GCVE-0-2026-77762)
Vulnerability from cvelistv5 – Published: 2026-09-23 11:19 – Updated: 2026-09-30 14:50
VLAI
EPSS
VEX
Title
Apache Tomcat: Stale HPACK emitter injects trailers into recycled pooled Request
Summary
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') vulnerability in Apache Tomcat allows an attacker to inject trailer fields into another HTTP/2 request.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.39 through 9.0.121.
The following versions were EOL at the time the CVE was created but are
known to be affected: from 8.5.59 through 8.5.100. Other unsupported versions may also be affected.
Users are recommended to upgrade to version 11.0.26, 10.1.60, 9.0.122, which fix the issue.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 15:40 UTC
CWE
- CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/y5r9fvjo7ol24mkoy… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… |
Impacted products
1 product
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CVE-2026-77756 (GCVE-0-2026-77756)
Vulnerability from cvelistv5 – Published: 2026-09-23 11:18 – Updated: 2026-09-23 18:10
VLAI
EPSS
VEX
Title
Apache Tomcat: Transfer-Encoding honored for HTTP/1.0 requests
Summary
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') vulnerability in Apache Tomcat caused by processing the transfer-encoding header for an HTTP/1.0 request may allow an attacker to cause one request from another user to fail when Tomcat is located behind a reverse proxy.
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known to be affected: from 8.5.67 through 8.5.100. Other unsupported versions may also be affected.
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Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 13:18 UTC
CWE
- CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/bl5b6rxqh3vb2k9bj… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… |
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1 product
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|---|---|---|---|
| Apache Software Foundation | Apache Tomcat |
Affected:
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CVE-2026-76183 (GCVE-0-2026-76183)
Vulnerability from cvelistv5 – Published: 2026-09-23 11:16 – Updated: 2026-09-30 14:54
VLAI
EPSS
VEX
Title
Apache Tomcat: Bypass of security constraints for WebSocket endpoints
Summary
Authentication Bypass by Alternate Name vulnerability in Apache Tomcat allowed the security constraints for any WebSocket endpoint to be bypassed.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M1 through 9.0.121.
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Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 15:33 UTC
CWE
- CWE-289 - Authentication Bypass by Alternate Name
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/45mxk8nj2q8pkhct6… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… |
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1 product
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| Apache Software Foundation | Apache Tomcat |
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CVE-2026-75973 (GCVE-0-2026-75973)
Vulnerability from cvelistv5 – Published: 2026-09-23 11:14 – Updated: 2026-09-23 18:10
VLAI
EPSS
VEX
Title
Apache Tomcat: Cross-context authentication mix-up with Jakarta Authentication configured
Summary
Improper Authentication vulnerability in Apache Tomcat. When Jakarta Authentication was configured with SimpleAuthConfigProvider as the default provider and multiple web application used that provider, the realm for the first web application to authenticate a request would be used for all web applications.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M4 through 9.0.121.
The following versions were EOL at the time the CVE was created but are
known to be affected: from 8.5.0 through 8.5.100. Other unsupported versions may also be affected.
Users are recommended to upgrade to version 11.0.26, 10.1.60, 9.0.122, which fixes the issue.
Severity
7.3 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 15:28 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
2 references
| URL | Tags |
|---|---|
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| http://www.openwall.com/lists/oss-security/2026/0… |
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| Apache Software Foundation | Apache Tomcat |
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CVE-2026-73581 (GCVE-0-2026-73581)
Vulnerability from cvelistv5 – Published: 2026-09-23 11:08 – Updated: 2026-09-30 14:53
VLAI
EPSS
VEX
Title
Apache Tomcat: OpenSSL and OpenSSL-FFM TLS implementations ignore CRLs when certificate uses a keystore
Summary
Improper Check for Certificate Revocation vulnerability in Apache Tomcat. Both the OpenSSL and OpenSSL-FFM TLS implementations ignore CRLs when certificate uses a keystore.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0-M1 through 9.0.121.
The following versions were EOL at the time the CVE was created but are
known to be affected: from 8.5.0 through 8.5.100. Other unsupported versions may also be affected.
Users are recommended to upgrade to version 11.0.26, 10.1.59, 9.0.122, which fixes the issue.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 15:19 UTC
CWE
- CWE-299 - Improper Check for Certificate Revocation
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/r0dj3h1pbn4wv96fh… | 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 , ≤ 11.0.25
(semver)
Affected: 10.1.0-M1 , ≤ 10.1.59 (semver) Affected: 9.0.0.M1 , ≤ 9.0.121 (semver) Affected: 8.5.0 , ≤ 8.5.100 (semver) Unaffected: 0 , < 8.5.0 (semver) |
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