CVE-2026-65637
Critical
Description
Improper Input Validation vulnerability in Apache Tomcat due to incomplete fix for CVE-2026-32990. This issue affects Apache Tomcat: from 11.0.20 through 11.0.24, from 10.1.53 through 10.1.57, from 9.0.115 through 9.0.120. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.
SeverityCritical
CVSS9.8
Exploit probability55. percentile0.8%
Product
Apache Tomcat
PublishedAug 25, 2026
First seenAug 25, 2026
Weakness typeCWE-20Improper input validation
How to fix
Update
- apache tomcat9.0.121, 10.1.58, 11.0.25 or later
- org.apache.tomcat:tomcat-coyote11.0.25, 10.1.59, 9.0.121 or later
- org.apache.tomcat.embed:tomcat-embed-core11.0.25, 10.1.59, 9.0.121 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| apache tomcat | 9.0.115 ≤ v < 9.0.121, 10.1.53 ≤ v < 10.1.58, 11.0.20 ≤ v < 11.0.25 | 9.0.121, 10.1.58, 11.0.25 |
| org.apache.tomcat:tomcat-coyoteMaven | 11.0.20 ≤ v < 11.0.25, 10.1.53 ≤ v < 10.1.59, 9.0.115 ≤ v < 9.0.121 | 11.0.25, 10.1.59, 9.0.121 |
| org.apache.tomcat.embed:tomcat-embed-coreMaven | 11.0.20 ≤ v < 11.0.25, 10.1.53 ≤ v < 10.1.59, 9.0.115 ≤ v < 9.0.121 | 11.0.25, 10.1.59, 9.0.121 |
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