OCTOBER 7, 2026
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Case File

CVE-2026-86350

CRITICAL · CVSS 9.1 EPSS 0.31%

Source: NVD + CISA KEV + EPSS · Published 2026-09-23 · Last synced 2026-10-07

CyberRota Analysis

AI-Generated

Apache Tomcat versions 11.0.22 to 11.0.25, 10.1.55 to 10.1.59, and 9.0.118 to 9.0.121 are vulnerable to HTTP request/response smuggling due to a regression in a previous fix, leading to potential request header mix-ups. This critical vulnerability (CVSS 9.1) could allow attackers to manipulate requests, potentially compromising the integrity and confidentiality of the application. Organizations using affected versions should prioritize upgrading to the recommended versions to mitigate the risk.

CVE
CVE-2026-86350
Severity
CRITICAL
CVSS
9.1
EPSS
0.31%
Apache

Original NVD Description

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.