CVE-2026-77791

CVE Enrichment

CVSS: 7.5 HIGH
EPSS: 0.53%
EPSS Percentile: 43.23%
CISA KEV: Not listed

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.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: security@apache.org
Published: 23-Sep-2026 19:17
Last Modified: 24-Sep-2026 02:19
EPSS Date: 2026-10-11
CWE: CWE-400

CVSS Vector


            CVSS:3.1                            AV:N /
                            AC:L /
                            PR:N /
                            UI:N /
                            S:U /
                            C:N /
                            I:N /
                            A:H

References

Last enrichment sync: 12-Oct-2026 04:06
Sources: NVD · FIRST EPSS · CISA KEV
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Reported Context (1)

(GitLab), CVE-2026-96512 (Sudo), CVE-2026-87022, CVE-2026-86350, CVE-2026-78437, CVE-2026-78383, CVE-2026-77791, CVE-2026-79677, CVE-2026-76183, CVE-2026-75973, CVE-2026-86248, CVE-2026-73581 (Apache Tomcat), Weekly Security Recap: Exploited Citrix NetScaler Flaw and Dozens of Vulnerabilities

CVE (135)

Vendors (1)

Products (2)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.