CVE-2026-55955

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Source
https://cve.org/CVERecord?id=CVE-2026-55955
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55955.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-55955
Aliases
Downstream
Related
Published
2026-06-29T20:44:39.779Z
Modified
2026-07-09T10:14:38.597421177Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N CVSS Calculator
Summary
Apache Tomcat: EncryptInterceptor not protected against replay attacks
Details

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.

Database specific 
{
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "introduced": "11.0.0-M1"
                },
                {
                    "last_affected": "11.0.22"
                },
                {
                    "introduced": "10.1.0-M1"
                },
                {
                    "last_affected": "10.1.55"
                },
                {
                    "introduced": "9.0.13"
                },
                {
                    "last_affected": "9.0.118"
                },
                {
                    "introduced": "8.5.38"
                },
                {
                    "last_affected": "8.5.100"
                },
                {
                    "introduced": "7.0.100"
                },
                {
                    "last_affected": "7.0.109"
                }
            ]
        },
        {
            "source": "DESCRIPTION",
            "extracted_events": [
                {
                    "introduced": "11.0.0-M1"
                },
                {
                    "fixed": "11.0.22"
                },
                {
                    "introduced": "10.1.0-M1"
                },
                {
                    "fixed": "10.1.55"
                },
                {
                    "introduced": "9.0.13"
                },
                {
                    "fixed": "9.0.18"
                },
                {
                    "introduced": "8.5.38"
                },
                {
                    "fixed": "8.5.100"
                },
                {
                    "introduced": "7.0.100"
                },
                {
                    "fixed": "7.0.109"
                }
            ]
        }
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55955.json",
    "cna_assigner": "apache",
    "cwe_ids": [
        "CWE-287"
    ]
}
References

Affected packages

Git / github.com/apache/tomcat

Affected ranges

Type
GIT
Repo
https://github.com/apache/tomcat
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
854f4dcf435a6d335576aa22402e2871c66f4fd9
Introduced
e9d17cddc285615807ec5fef09240777436b25dc
Fixed
59f3f1ab4f905f94c9c99cad579d6afb3a935b66
Introduced
56e547d387ab49f688c93fe9ca082b1b5d94deed
Fixed
b5c1bba61f2e54875bd6d538ae145fffd7b217a8
Database specific 
{
    "source": "CPE_RANGE",
    "cpe": "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "9.0.19"
        },
        {
            "introduced": "10.1.0"
        },
        {
            "fixed": "10.1.56"
        },
        {
            "introduced": "11.0.0"
        },
        {
            "fixed": "11.0.23"
        }
    ]
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55955.json"