CVE-2026-55955

Apache Tomcat: EncryptInterceptor not protected against replay attacks

State: Published
Severity: 6.5 Medium
Published: Jun 29, 2026
Updated: Jun 30, 2026
Reserved: Jun 17, 2026

Description

Improper Authentication vulnerability in Apache Tomcat allowed a replay attack against the EncryptionInterceptor in the cluster component.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.13 through 9.0.18, from 8.5.38 through 8.5.100, from 7.0.100 through 7.0.109.

Users are recommended to upgrade to version 11.0.23, 10.1.56, 9.0.119, which fixes the issue.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N	CISA-ADP

Weaknesses

CWE-287 Improper Authentication

Affected Products

Product	Versions
Apache TomcatApache Software Foundation	11.0.0-M1 through 11.0.22Affected 10.1.0-M1 through 10.1.55Affected 9.0.13 through 9.0.118Affected 8.5.38 through 8.5.100Affected 7.0.100 through 7.0.109Affected

References

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