CVE-2026-79677 (GCVE-0-2026-79677)

Vulnerability from cvelistv5 – Published: 2026-09-23 11:28 – Updated: 2026-09-23 18:10
VLAI
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. 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.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 16:05 UTC
CWE
  • CWE-772 - Missing release of resource after effective lifetime
  • CWE-1025 - Comparison using wrong factors
Assigner
References
Impacted products
Vendor Product Version CPE status
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: 7.0.43 , ≤ 7.0.109 (semver)
Unaffected: 0 , < 7.0.43 (semver)
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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