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CVE-2026-55955

Apache Tomcat: EncryptInterceptor not protected against replay attacks

Published: Jun 29, 2026Updated: Jul 10, 2026 Sources: CVE List NVDCWE-287
6.5MEDIUM
NVD MITRE
EPSS Score
0.5%
Top 61.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-287

Affected Products

Apache Software Foundation
oss-project·USaka apache foundation
Apache TomcatOn-premWeb App
Networking Infrastructure / load-balancer-proxy
apache
oss-project·USaka apache http server, apache httpd
tomcatOn-premWeb App
Networking Infrastructure / load-balancer-proxy

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Initial Access
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References

https://lists.apache.org/thread/g4p5sf45p3f9r011pwqs9r54yd64s106
lists.apache.org
http://www.openwall.com/lists/oss-security/2026/06/29/24
openwall.com

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