FKIE_CVE-2026-65644

Vulnerability from fkie_nvd - Published: 2026-08-21 04:18 - Updated: 2026-08-21 04:18
Severity
Summary
Rocket.Chat in versions before 8.8.0, 8.7.1, 8.6.2, 8.5.3, 8.4.6, 8.3.8, 8.2.8, 8.1.8, and 7.10.15 has a REST API endpoint POST /api/v1/livechat/visitor that accepts an unauthenticated, unsanitized name field for Livechat visitors. This name is stored raw and later rendered via dangerouslySetInnerHTML in the Omnichannel Queue side panel (InquireSidePanelItem.tsx), injecting a real, clickable HTML link - pointing to any attacker-controlled domain, with arbitrary social-engineering text - into the DOM of any agent viewing the queue.
References
support@hackerone.comhttps://github.com/RocketChat/Rocket.Chat/pull/41595
support@hackerone.comhttps://hackerone.com/reports/3872858
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Rocket.Chat",
          "vendor": "Rocket.Chat",
          "versions": [
            {
              "lessThan": "8.8.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "8.7.1",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "8.6.2",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "8.5.3",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "8.4.6",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "8.3.8",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "8.2.8",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "8.1.8",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "7.10.15",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "support@hackerone.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Rocket.Chat in versions before 8.8.0, 8.7.1, 8.6.2, 8.5.3, 8.4.6, 8.3.8, 8.2.8, 8.1.8, and 7.10.15 has a REST API endpoint POST /api/v1/livechat/visitor that accepts an unauthenticated, unsanitized name field for Livechat visitors. This name is stored raw and later rendered via dangerouslySetInnerHTML in the Omnichannel Queue side panel (InquireSidePanelItem.tsx), injecting a real, clickable HTML link - pointing to any attacker-controlled domain, with arbitrary social-engineering text - into the DOM of any agent viewing the queue."
    }
  ],
  "id": "CVE-2026-65644",
  "lastModified": "2026-08-21T04:18:13.780",
  "metrics": {},
  "published": "2026-08-21T04:18:13.780",
  "references": [
    {
      "source": "support@hackerone.com",
      "url": "https://github.com/RocketChat/Rocket.Chat/pull/41595"
    },
    {
      "source": "support@hackerone.com",
      "url": "https://hackerone.com/reports/3872858"
    }
  ],
  "sourceIdentifier": "support@hackerone.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "support@hackerone.com",
      "type": "Secondary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.