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.
Analysis
Analysis and contextual insights are available on OpenCVE Cloud.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Apache Software Foundation | Apache Tomcat | unaffected |
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| Vendor | Product | Confidence | Versions | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Apache | Apache Tomcat | 95% |
|
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No vendor fix or workaround currently provided.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
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Wed, 23 Sep 2026 15:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Apache
Apache apache Tomcat |
|
| Vendors & Products |
Apache
Apache apache Tomcat |
Wed, 23 Sep 2026 13:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
cvssV3_1
|
Wed, 23 Sep 2026 11:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Apache Tomcat: DoS via busy wait during WebSocket close | |
| Weaknesses | CWE-400 | |
| References |
|
MITRE
Status: PUBLISHED
Assigner: apache
Published:
Updated: 2026-09-23T12:50:22.374Z
Reserved: 2026-08-21T12:38:02.420Z
Link: CVE-2026-77791
Vulnrichment
Updated: 2026-09-23T12:45:13.588Z
NVD
Status : Received
Published: 2026-09-23T12:17:06.927
Modified: 2026-09-23T13:17:29.853
Link: CVE-2026-77791
Redhat
No data.
OpenCVE Enrichment
Updated: 2026-09-23T15:30:07Z
-
CWE-400
Uncontrolled Resource Consumption