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FKIE_CVE-2026-84207

Vulnerability from fkie_nvd - Published: 2026-09-01 16:17 - Updated: 2026-09-01 18:17
Severity
5.4 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Summary
Heym before 0.0.98 fails to apply SSRF egress guards to WebSocket Send and WebSocket Trigger nodes, allowing authenticated users to connect to internal services. Attackers can craft workflow nodes with arbitrary URLs and headers to reach internal services and read responses from the WebSocket Trigger node.
References
disclosure@vulncheck.comhttps://github.com/heymrun/heym
disclosure@vulncheck.comhttps://github.com/heymrun/heym/blob/v0.0.97/backend/app/services/websocket_trigger_service.py
disclosure@vulncheck.comhttps://github.com/heymrun/heym/blob/v0.0.97/backend/app/services/websocket_utils.py
disclosure@vulncheck.comhttps://github.com/heymrun/heym/commit/540aade7c7495295062f32f4dfd0d6805f066f0c
disclosure@vulncheck.comhttps://github.com/heymrun/heym/releases/tag/v0.0.98
disclosure@vulncheck.comhttps://github.com/heymrun/heym/security/advisories/GHSA-mqw6-g845-w596
disclosure@vulncheck.comhttps://www.vulncheck.com/advisories/heym-before-0.0.98-ssrf-via-websocket-endpoints
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://github.com/heymrun/heym",
          "defaultStatus": "unaffected",
          "packageURL": "pkg:github/heymrun/heym",
          "product": "heym",
          "repo": "https://github.com/heymrun/heym",
          "vendor": "heymrun",
          "versions": [
            {
              "lessThan": "0.0.98",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "0.0.98",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "disclosure@vulncheck.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Heym before 0.0.98 fails to apply SSRF egress guards to WebSocket Send and WebSocket Trigger nodes, allowing authenticated users to connect to internal services. Attackers can craft workflow nodes with arbitrary URLs and headers to reach internal services and read responses from the WebSocket Trigger node."
    }
  ],
  "id": "CVE-2026-84207",
  "lastModified": "2026-09-01T18:17:48.960",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.4,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.5,
        "source": "disclosure@vulncheck.com",
        "type": "Secondary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "LOW",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "LOW",
          "vulnIntegrityImpact": "LOW",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "disclosure@vulncheck.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-84207",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-01T17:30:12.250553Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-01T16:17:35.763",
  "references": [
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/heymrun/heym"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/heymrun/heym/blob/v0.0.97/backend/app/services/websocket_trigger_service.py"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/heymrun/heym/blob/v0.0.97/backend/app/services/websocket_utils.py"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/heymrun/heym/commit/540aade7c7495295062f32f4dfd0d6805f066f0c"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/heymrun/heym/releases/tag/v0.0.98"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/heymrun/heym/security/advisories/GHSA-mqw6-g845-w596"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://www.vulncheck.com/advisories/heym-before-0.0.98-ssrf-via-websocket-endpoints"
    }
  ],
  "sourceIdentifier": "disclosure@vulncheck.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-918"
        }
      ],
      "source": "disclosure@vulncheck.com",
      "type": "Secondary"
    }
  ]
}



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