CVE-2026-41293

Apache Tomcat: HTTP/2 request headers not validated

State: Published
Severity: 9.8 Critical
Published: May 12, 2026
Updated: Sep 17, 2026
Reserved: Apr 20, 2026

Description

Improper Input Validation vulnerability in Apache Tomcat.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 10.0.0-M1 through 10.0.27. Older, end of support versions may also be affected.

Users are recommended to upgrade to version [FIXED_VERSION], which fixes 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	11.0.0-M1 through 11.0.21Affected 10.1.0-M1 through 10.1.54Affected 9.0.0.M1 through 9.0.117Affected 10.0.0-M1 through 10.0.27Affected 8.5.0 through 8.5.100Affected

References

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