CVE-2026-65637

Apache Tomcat: HTTP/2 no-authority bypass of strict SNI validation - CVE-2026-32990 fix incomplete

State: Published
Severity: 9.8 Critical
Published: Aug 25, 2026
Updated: Aug 26, 2026
Reserved: Jul 22, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-20 Improper Input Validation

Affected Products

Product	Versions
Apache TomcatApache Software Foundation	11.0.20 through 11.0.24Affected 10.1.53 through 10.1.57Affected 9.0.115 through 9.0.120Affected

References

https://lists.apache.org/thread/djog953z1ohsyt25bdvhfzbmsy22vgcjvendor-advisory

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