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CVE-2026-6334

Estado: AnalizadaBaja (3.8)—

Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to enforce client identity binding during the OAuth authorization code redemption flow which allows an authenticated OAuth client to redeem authorization codes issued to a different client via a crafted token exchange request.. Mattermost Advisory ID: MMSA-2026-00570

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Mattermost — Mattermost Server

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-6334",
  "cveTags": [],
  "metrics": {
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          "id": "CVE-2026-6334",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-05-18T14:36:26.287945Z"
        }
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    ],
    "cvssMetricV31": [
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        "cvssData": {
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  "published": "2026-05-18T08:16:14.313",
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      "tags": [
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      "source": "responsibledisclosure@mattermost.com"
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  "vulnStatus": "Analyzed",
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      "description": [
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      "lang": "en",
      "value": "Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to enforce client identity binding during the OAuth authorization code redemption flow which allows an authenticated OAuth client to redeem authorization codes issued to a different client via a crafted token exchange request.. Mattermost Advisory ID: MMSA-2026-00570"
    }
  ],
  "lastModified": "2026-06-17T11:00:40.780",
  "configurations": [
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}