Open redirect in Apache Tomcat - CVE-2026-25854

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Main Vulnerability Database Vulnerabilities #VU125742

Open redirect in Apache Tomcat - CVE-2026-25854

Published: April 9, 2026 / Updated: April 10, 2026


Vulnerability identifier: #VU125742
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-25854
CWE-ID: CWE-601
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Apache Foundation
Affected software:
Apache Tomcat

Detailed vulnerability description

The vulnerability allows a remote attacker to redirect users to an arbitrary URI.

The vulnerability exists due to improper input validation in LoadBalancerDrainingValve when handling a specially crafted URL while a Tomcat node is in the disabled (draining) state. A remote attacker can send a specially crafted URL to redirect users to an arbitrary URI.

Only clustered deployments using LoadBalancerDrainingValve in the disabled (draining) state are affected.


How to mitigate CVE-2026-25854

Install security update from vendor's website.

Sources