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GHSA-C5PH-RGHF-FJFJ

Vulnerability from github – Published: 2026-06-29 21:32 – Updated: 2026-06-30 00:31

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.

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  "affected": [],
  "aliases": [
    "CVE-2026-55955"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-29T21:16:45Z",
    "severity": null
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  "details": "Improper Authentication vulnerability in Apache Tomcat allowed a replay attack against the EncryptionInterceptor in the cluster component.\n\nThis 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.\n\nUsers are recommended to upgrade to version 11.0.23, 10.1.56, 9.0.119, which fixes the issue.",
  "id": "GHSA-c5ph-rghf-fjfj",
  "modified": "2026-06-30T00:31:30Z",
  "published": "2026-06-29T21:32:15Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55955"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread/g4p5sf45p3f9r011pwqs9r54yd64s106"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/06/29/24"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-55955 (GCVE-0-2026-55955)

Vulnerability from cvelistv5 – Published: 2026-06-29 20:44 – Updated: 2026-06-29 22:24

Title

Apache Tomcat: EncryptInterceptor not protected against replay attacks

Summary

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.

Severity

No CVSS data available.

CWE

CWE-287 - Improper Authentication

Assigner

apache

References

2 references

URL	Tags
https://lists.apache.org/thread/g4p5sf45p3f9r011p…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/0…

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache Tomcat	Affected: 11.0.0-M1 , ≤ 11.0.22 (semver) Affected: 10.1.0-M1 , ≤ 10.1.55 (semver) Affected: 9.0.13 , ≤ 9.0.118 (semver) Affected: 8.5.38 , ≤ 8.5.100 (semver) Affected: 7.0.100 , ≤ 7.0.109 (semver)

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-C5PH-RGHF-FJFJ

CVE-2026-55955 (GCVE-0-2026-55955)

Tags

Sightings

Nomenclature