Advisory severityMedium6.1Apache Software Foundation

Medium [CVE-2026-25854] Occasional URL redirection to untrusted Site ('Open Redirect') vulnerability in Apache Tomcat via the LoadBalancerDrainingValve

This medium-severity Apache Software Foundation advisory covers CVE-2026-25854 affecting Apache Tomcat, Tomcat.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-25854 Source published Apr 9, 2026Source updated Jun 17, 2026

VulniPulse record published Jul 11, 2026

CVE-2026-25854

Affected products & platforms

Apache Software FoundationTomcat

Open source advisory

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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.

Affected versions

11.0.0-M1 through 11.0.18
10.1.0-M1 through 10.1.52
9.0.0.M23 through 9.0.115
8.5.30 through 8.5.100.
through 8.5.100

Official advisory · high-confidence parse· fetched 3 months ago·verify at source

Fixed versions

11.0.20
10.1.53
9.0.116

Official advisory · high-confidence parse· fetched 3 months ago·verify at source

Mitigation

Upgrade to a fixed release: 11.0.20, 10.1.53, 9.0.116. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 3 months ago·verify at source

Sources

Official and corroborating records used to build this advisory.

NVD discovery recordNVD
Independent discovery and scoring cross-reference. Vendor remediation guidance takes precedence. Discovered from the machine-readable feed https://services.nvd.nist.gov/rest/json/cves/2.0; this link opens the NVD record for CVE-2026-25854 instead of the raw feed document.
NIST National Vulnerability Database

Cross-references

Validate CVE metadata against the authoritative registries.

CVE-2026-25854NVD CVE.org MITRE

Official resources

Apache Tomcat security bulletins (per major version) (target: 11.0.20 / 10.1.53 / 9.0.116)
Official documentation
This advisory names 11.0.20 / 10.1.53 / 9.0.116 as the first fixed releases — official upgrade documentation for Apache Tomcat security bulletins (per major version).
ASF Security — reporting & CVE process
Official documentation
The Apache Software Foundation's official security page: how ASF CVEs are published and where each project's advisories live.
Apache project downloads (fixed releases)
Official documentation
Official ASF download tree — fetch the fixed release named in this advisory from the project's directory.

Discussion(0)

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