Allocation of Resources Without Limits or Throttling Affecting org.apache.tomcat.embed:tomcat-embed-core package, versions [9.0.39, 9.0.121)[10.1.0-M1, 10.1.59)[11.0.0-M1, 11.0.25)
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 Sept 2026
- disclosed26 Aug 2026
- creditZhen Kong
Introduced: 26 Aug 2026
CVE-2026-68763 (opens in a new tab)How to fix?
Upgrade org.apache.tomcat.embed:tomcat-embed-core to version 9.0.121, 10.1.59, 11.0.25 or higher.
Overview
org.apache.tomcat.embed:tomcat-embed-core is a Core Tomcat implementation.
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the HTTP/2 backlog tracking when a stream is reset. An attacker can exhaust system resources by repeatedly resetting streams, leading to service disruption.
Note: This issue was fixed in Apache Tomcat 10.1.58 but the release vote for the 10.1.58 release candidate did not pass. Therefore, although users must download 10.1.59 to obtain a version that includes a fix for this issue, version 10.1.58 is not included in the list of affected versions.