Vulnerability-Lookup

CVE-2026-66422 (GCVE-0-2026-66422)

Vulnerability from cvelistv5 – Published: 2026-08-25 21:55 – Updated: 2026-08-26 18:52

Title

Apache Tomcat: Servlet role references can bypass declarative role constraints

Summary

Improper Authorization vulnerability in Apache Tomcat cause by security-role-ref definitions being incorrectly used as role aliases within the Realm in additional to the correct usage with Request.isUserInRole(). This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.25 through 9.0.120. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.46 through 8.5.100, from 7.0.97 through 7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.

Severity

8.1 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-26 18:52 UTC

CWE

CWE-285 - Improper Authorization

Assigner

apache mitre root

References

2 references

URL	Tags
https://lists.apache.org/thread/j5plylz1b2vhqvbkq…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/08/26/6

Impacted products

1 product

Vendor	Product	Version	CPE status
Apache Software Foundation	Apache Tomcat	Affected: 11.0.0-M1 , ≤ 11.0.24 (semver) Affected: 10.1.0-M1 , ≤ 10.1.57 (semver) Affected: 9.0.25 , ≤ 9.0.120 (semver) Affected: 8.5.46 , ≤ 8.5.100 (semver) Affected: 7.0.97 , ≤ 7.0.109 (semver) Unaffected: 0 , < 7.0.97 (semver)	guessed

Credits

4ra1n, pyn3rd and unam4

Show details on NVD website

JSON

To clipboard

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CERTFR-2026-AVI-1083

Vulnerability from certfr_avis - Published: 2026-08-26 - Updated: 2026-08-26

De multiples vulnérabilités ont été découvertes dans Apache Tomcat. Elles permettent à un attaquant de provoquer un déni de service à distance et un contournement de la politique de sécurité.

Solutions

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

Impacted products

	Vendor	Product	Description
	Apache	Tomcat	Tomcat versions 10.1.x antérieures à 10.1.59

References

Title

Publication Time

FKIE_CVE-2026-66422

Vulnerability from fkie_nvd - Published: 2026-08-25 22:17 - Updated: 2026-08-26 20:17

Severity

8.1 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Summary

References

	URL	Tags
	security@apache.org	https://lists.apache.org/thread/j5plylz1b2vhqvbkqn7k58nygxhcpk73
	af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2026/08/26/6

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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GHSA-W3XG-786F-G788

Vulnerability from github – Published: 2026-08-26 00:30 – Updated: 2026-08-26 21:31

Details

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.25 through 9.0.120.

The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.46 through 8.5.100, from 7.0.97 through 7.0.109. Other unsupported versions may also be affected.

Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.

Severity

8.1 (High)


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

Show details on source website

JSON

To clipboard

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    "severity": "HIGH"
  },
  "details": "Improper Authorization vulnerability in Apache Tomcat cause by security-role-ref definitions being incorrectly used as role aliases within the Realm in additional to the correct usage with Request.isUserInRole().\n\n\n\nThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.25 through 9.0.120.\n\n\n\nThe following versions were EOL at the time the CVE was created but are \nknown to be affected: from 8.5.46 through 8.5.100, from 7.0.97 through 7.0.109. Other unsupported versions may also be affected.\n\n\n\nUsers are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.",
  "id": "GHSA-w3xg-786f-g788",
  "modified": "2026-08-26T21:31:39Z",
  "published": "2026-08-26T00:30:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-66422"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread/j5plylz1b2vhqvbkqn7k58nygxhcpk73"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/08/26/6"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-66422 (GCVE-0-2026-66422)

CERTFR-2026-AVI-1083

Solutions

FKIE_CVE-2026-66422

GHSA-W3XG-786F-G788

Tags

Sightings

Nomenclature