Apache Tomcat: EncryptInterceptor not protected against replay attacks

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Summary

CVECVE-2026-55955
StatePUBLISHED
Assignerapache
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-29 21:16:45 UTC
Updated2026-07-02 19:04:36 UTC
DescriptionImproper 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.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from ADP

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS: 0.002610000 probability, percentile 0.174730000 (date 2026-07-03)

Problem Types: CWE-287 | CWE-287 CWE-287 Improper Authentication

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Apache Tomcat All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Apache Software Foundation Apache Tomcat affected 11.0.0-M1 11.0.22 semver Not specified
CNA Apache Software Foundation Apache Tomcat affected 10.1.0-M1 10.1.55 semver Not specified
CNA Apache Software Foundation Apache Tomcat affected 9.0.13 9.0.118 semver Not specified
CNA Apache Software Foundation Apache Tomcat affected 8.5.38 8.5.100 semver Not specified
CNA Apache Software Foundation Apache Tomcat affected 7.0.100 7.0.109 semver Not specified

References

ReferenceSourceLinkTags
www.openwall.com/lists/oss-security/2026/06/29/24 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Third Party Advisory
lists.apache.org/thread/g4p5sf45p3f9r011pwqs9r54yd64s106 [email protected] lists.apache.org Vendor Advisory, Mailing List
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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