CVE-2026-79677: CWE-772 Missing release of resource after effective lifetime in Apache Software Foundation Apache Tomcat
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. 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 7.0.43 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.
AI Analysis
Technical Summary
The vulnerability identified as CVE-2026-79677 in Apache Tomcat is due to missing release of resources after their effective lifetime combined with incorrect comparison factors. This results in lost timeouts for asynchronous WebSocket writes, leading to denial of service conditions. The issue affects Apache Tomcat versions from 11.0.0-M1 through 11.0.25, 10.1.0-M1 through 10.1.59, 9.0.0.M1 through 9.0.121, and older EOL versions 8.5.0 through 8.5.100 and 7.0.43 through 7.0.109. The vendor has addressed the vulnerability in versions 11.0.26, 10.1.60, and 9.0.122.
Potential Impact
The vulnerability can cause denial of service by losing timeouts for asynchronous WebSocket writes, which may lead to resource exhaustion or service disruption in affected Apache Tomcat servers.
Mitigation Recommendations
Users should upgrade affected Apache Tomcat versions to 11.0.26, 10.1.60, or 9.0.122 where the issue is fixed. No other mitigation guidance is provided, and upgrading to the fixed versions is the recommended remediation.
CVE-2026-79677: CWE-772 Missing release of resource after effective lifetime in Apache Software Foundation Apache Tomcat
Description
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. 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 7.0.43 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.
CVSS v3.1
Score 7.5high
Affected software
Apache Software Foundation
Apache Tomcat
pkg:maven/org.apache.tomcat/tomcatRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability identified as CVE-2026-79677 in Apache Tomcat is due to missing release of resources after their effective lifetime combined with incorrect comparison factors. This results in lost timeouts for asynchronous WebSocket writes, leading to denial of service conditions. The issue affects Apache Tomcat versions from 11.0.0-M1 through 11.0.25, 10.1.0-M1 through 10.1.59, 9.0.0.M1 through 9.0.121, and older EOL versions 8.5.0 through 8.5.100 and 7.0.43 through 7.0.109. The vendor has addressed the vulnerability in versions 11.0.26, 10.1.60, and 9.0.122.
Potential Impact
The vulnerability can cause denial of service by losing timeouts for asynchronous WebSocket writes, which may lead to resource exhaustion or service disruption in affected Apache Tomcat servers.
Mitigation Recommendations
Users should upgrade affected Apache Tomcat versions to 11.0.26, 10.1.60, or 9.0.122 where the issue is fixed. No other mitigation guidance is provided, and upgrading to the fixed versions is the recommended remediation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-08-25T11:23:12.731Z
- State
- PUBLISHED
Threat ID: 6ab3b90df7a7c54106b30f16
Added to database: 09/23/2026, 11:33:33 UTC
Last enriched: 09/23/2026, 11:48:41 UTC
Last updated: 09/24/2026, 02:26:02 UTC
Views: 10
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