How severe is CVE-2026-25854?

CVE-2026-25854 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-25854 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-25854?

CVE-2026-25854 primarily affects Apache Tomcat. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-25854?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-25854 have an EU (EUVD) identifier?

Yes. CVE-2026-25854 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21008.

When was CVE-2026-25854 published?

CVE-2026-25854 was published on 2026-04-09 and last updated on 2026-06-17.

CVE-2026-25854

CVE-2026-25854 is a medium-severity vulnerability in Apache Tomcat with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-601.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-21008
Weakness: CWE-601
Affected product: Apache Tomcat
Published: 2026-04-09
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2026-25854?: 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.
How severe is CVE-2026-25854?: CVE-2026-25854 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-25854 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-25854?: CVE-2026-25854 primarily affects Apache Tomcat. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-25854?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-25854 have an EU (EUVD) identifier?: Yes. CVE-2026-25854 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21008.
When was CVE-2026-25854 published?: CVE-2026-25854 was published on 2026-04-09 and last updated on 2026-06-17.

References

Affected products (6)

cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone23:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone24:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone25:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone26:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone27:*:*:*:*:*:*

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