CVE-2026-41284: Apache Tomcat: Unbounded read in WebDAV LOCK and PROPFIND handling

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-12 · updated 2026-10-26
Weakness: CWE-770

Description

Allocation of Resources Without Limits or Throttling vulnerability in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117. Older, unsupported versions may also be affected. Users are recommended to upgrade to version [FIXED_VERSION], which fixes the issue.

Affected products

Apache Tomcat: from 4.0.0 through 7.0.109; from 8.5.0 through 8.5.100; from 9.0.0 before 9.0.118; from 10.0.0 through 10.0.27; from 10.1.0 before 10.1.55; from 11.0.0 before 11.0.22 — fixed in 9.0.118, 10.1.55, 11.0.22

How to fix

Upgrade to a fixed version: Apache Tomcat 9.0.118, 10.1.55, 11.0.22. Check the vendor advisory for mitigations.

References

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