Always-Incorrect Control Flow Implementation Affecting org.apache.tomcat:tomcat-util package, versions [9.0.0.M1,9.0.119)[10.1.0-M1,10.1.56)[11.0.0-M1,11.0.23)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published30 Jun 2026
- disclosed29 Jun 2026
- creditUnknown
Introduced: 29 Jun 2026
CVE-2026-55276 (opens in a new tab)How to fix?
Upgrade org.apache.tomcat:tomcat-util to version 9.0.119, 10.1.56, 11.0.23 or higher.
Overview
org.apache.tomcat:tomcat-util is a Common code shared by multiple Tomcat components.
Affected versions of this package are vulnerable to Always-Incorrect Control Flow Implementation due to the incomplete logging of the effective web.xml when special roles and empty authorization constraints are present. An attacker can bypass intended access restrictions by exploiting the absence of these constraints in the logged configuration.