CVE-2026-25854: Apache Tomcat: Occasionally open redirect
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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 11.0.20 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.1.53 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 9.0.116
Event History
Frequently Asked Questions
What is the severity of CVE-2026-25854?
CVE-2026-25854 is classified as a medium severity vulnerability due to the potential for open redirects to untrusted sites.
How do I fix CVE-2026-25854?
To fix CVE-2026-25854, upgrade Apache Tomcat to version 11.0.20, 10.1.53, or 9.0.116 or later.
What versions of Apache Tomcat are affected by CVE-2026-25854?
CVE-2026-25854 affects Apache Tomcat versions from 11.0.0-M1 through 11.0.18, 10.1.0-M1 through 10.1.52, and 9.0.0.M23 through 9.0.115.
What type of vulnerability is CVE-2026-25854?
CVE-2026-25854 is an open redirect vulnerability that allows for occasional redirection to untrusted sites.
Is CVE-2026-25854 a remote exploit?
Yes, CVE-2026-25854 can potentially be exploited remotely due to its nature of allowing untrusted URL redirection.