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CVE-2026-25854

MediumPublished

Apache Tomcat: Occasionally open redirect

Published: Apr 9, 2026
Updated: Apr 10, 2026
Assigning CNA: apache
Evidence observed: Aug 25, 2026

Primary CVSS

6.1/ 10Medium

nvd · CVSS 3.1

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

EPSS probability estimate

0.5%

Low · next 30 days

Percentile: 43.3%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

Occasional URL redirection to untrusted Site ('Open Redirect') vulnerability in Apache Tomcat via the LoadBalancerDrainingValve. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.1.0-M1 through 10.1.52, from 9.0.0.M23 through 9.0.115, from 8.5.30 through 8.5.100. Other, unsupported versions may also be affected Users are recommended to upgrade to version 11.0.20, 10.1.53 or 9.0.116, which fix the issue.

Sources

cve-2026-25854PoC
Original security research and proof-of-concept for CVE-2026-25854, an open redirect vulnerability in Apache Tomcat cluster configurations, including technical analysis and reproduction steps.

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