CVE-2026-68763
High
Description
Uncontrolled Resource Consumption vulnerability in Apache Tomcat via an allocation leak in the HTTP/2 backlog tracking when a stream is reset This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.39 through 9.0.120. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.59 through 8.5.100. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Apache Tomcat
PublishedAug 25, 2026
First seenAug 25, 2026
Weakness typeCWE-400Uncontrolled resource consumption
How to fix
Update
- apache tomcat9.0.121, 10.1.58, 11.0.25 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| apache tomcat | 8.5.59 ≤ v < 9.0.121, 10.1.0 ≤ v < 10.1.58, 11.0.0 ≤ v < 11.0.25 | 9.0.121, 10.1.58, 11.0.25 |
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