Vulnerability-Lookup

CVE-2026-7184 (GCVE-0-2026-7184)

Vulnerability from cvelistv5 – Published: 2026-06-12 15:49 – Updated: 2026-06-12 17:19

Title

Mattermost Remote Cluster PATCH API Leaks Authentication Tokens

Summary

Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15 fail to sanitize the Remote Cluster API response on PATCH operations, which allows authenticated users with the {{manage_secure_connections}} permission to obtain remote cluster authentication tokens via a PATCH request to the remote cluster endpoint.. Mattermost Advisory ID: MMSA-2026-00662

Severity

6.5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-12 17:19 UTC

CWE

CWE-201 - Insertion of Sensitive Information Into Sent Data

Assigner

Mattermost mitre root

References

1 reference

URL	Tags
https://mattermost.com/security-updates	vendor-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
Mattermost	Mattermost	Affected: 11.6.0 , ≤ 11.6.1 (semver) Affected: 11.5.0 , ≤ 11.5.4 (semver) Affected: 10.11.0 , ≤ 10.11.15 (semver) Unaffected: 11.7.0 Unaffected: 11.6.2 Unaffected: 11.5.5 Unaffected: 10.11.17	guessed

Credits

winfunc

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-7184

Vulnerability from fkie_nvd - Published: 2026-06-12 17:16 - Updated: 2026-06-18 14:45

Severity

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

Summary

References

	URL	Tags
	responsibledisclosure@mattermost.com	https://mattermost.com/security-updates	Vendor Advisory

Impacted products

Vendor	Product	Version
mattermost	mattermost_server	*
mattermost	mattermost_server	*
mattermost	mattermost_server	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Mattermost",
          "vendor": "Mattermost",
          "versions": [
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              "lessThanOrEqual": "11.6.1",
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              "versionType": "semver"
            },
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              "versionType": "semver"
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            },
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            },
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            },
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GHSA-9P44-R552-4WP9

Vulnerability from github – Published: 2026-06-12 18:31 – Updated: 2026-08-24 21:48

Summary

Mattermost doesn't sanitize the Remote Cluster API response on PATCH operations

Details

Severity

6.5 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/mattermost/mattermost-server"
      },
      "ranges": [
        {
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        }
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      "versions": [
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    },
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        "name": "github.com/mattermost/mattermost/server/v8"
      },
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          "events": [
            {
              "introduced": "8.0.0-20250731163400-5b955468ea1e"
            },
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            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
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    "CVE-2026-7184"
  ],
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    "cwe_ids": [
      "CWE-201"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-24T21:48:36Z",
    "nvd_published_at": "2026-06-12T17:16:27Z",
    "severity": "MODERATE"
  },
  "details": "Mattermost versions 11.6.x \u003c= 11.6.1, 11.5.x \u003c= 11.5.4, 10.11.x \u003c= 10.11.15 fail to sanitize the Remote Cluster API response on PATCH operations, which allows authenticated users with the {{manage_secure_connections}} permission to obtain remote cluster authentication tokens via a PATCH request to the remote cluster endpoint. Mattermost Advisory ID: MMSA-2026-00662",
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  "modified": "2026-08-24T21:48:36Z",
  "published": "2026-06-12T18:31:59Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-7184"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mattermost/mattermost/pull/36313"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mattermost/mattermost/pull/36311"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mattermost/mattermost/pull/36310"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mattermost/mattermost/pull/36306"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mattermost/mattermost/pull/36288"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mattermost/mattermost/commit/cad3e8e51a4d8627af6442f9df8ae3667fac7fc1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mattermost/mattermost/commit/c5e67e28271c23cb585fe1a30ae81defcde848d6"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mattermost/mattermost/commit/bd8fc92226726da06c8fabaef568cc9ebaee1cb8"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mattermost/mattermost/commit/6fd49f56b5920569218fd2fc76d8ae802942f274"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mattermost/mattermost/commit/1a0643df00c1f51a3b7e919eec034eaf955f612f"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mattermost/mattermost/releases/tag/v10.11.16"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mattermost/mattermost/releases/tag/v11.5.5"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mattermost/mattermost/releases/tag/v11.6.2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mattermost/mattermost/releases/tag/v11.7.0"
    },
    {
      "type": "WEB",
      "url": "https://mattermost.com/security-updates"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/mattermost/mattermost"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Mattermost doesn\u0027t sanitize the Remote Cluster API response on PATCH operations"
}

WID-SEC-W-2026-1580

Vulnerability from csaf_certbund - Published: 2026-05-18 22:00 - Updated: 2026-06-14 22:00

Summary

Mattermost Server: Schwachstelle ermöglicht nicht spezifizierten Angriff

Severity

Mittel

Scope

1 vulnerability in this advisory, including CVE-2026-7184.

CVE-2026-7184

Known affected: 4 products

Open the full advisory

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-7184 (GCVE-0-2026-7184)

FKIE_CVE-2026-7184

GHSA-9P44-R552-4WP9

WID-SEC-W-2026-1580

Tags

Sightings

Nomenclature

Related by attack behaviour