AUGUST 28, 2026
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Case File

CVE-2026-65927

HIGH · CVSS 7.5 EPSS 0.51%

Source: NVD + CISA KEV + EPSS · Published 2026-08-25 · Last synced 2026-08-28

CyberRota Analysis

AI-Generated

An off-by-one error in Apache Tomcat's rewrite valve processing allows the rewrite mechanism to incorrectly restart at the second rule instead of the first, potentially leading to unexpected behavior in URL rewriting. This vulnerability impacts multiple versions of Apache Tomcat, including those that are no longer supported, making it critical for users running affected versions to prioritize upgrading to the fixed releases (11.0.25, 10.1.58, or 9.0.121) to mitigate potential risks. Organizations relying on these versions should address this issue promptly to ensure the integrity of their URL handling processes.

CVE
CVE-2026-65927
Severity
HIGH
CVSS
7.5
EPSS
0.51%
Apache

Original NVD Description

Off-by-one Error vulnerability in Apache Tomcat impacting the [N] flag on the rewrite valves causes rewrite processing to restart at the second rule rather than the first rule. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120. 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. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121 which fix the issue.

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