FKIE_CVE-2026-114126

Vulnerability from fkie_nvd - Published: 2026-10-21 18:17 - Updated: 2026-10-22 17:21
Severity
8.7 (High) - CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N
Summary
Storybook is a frontend workshop for building user interface components and pages in isolation. From 8.0.0 until 8.6.19, 9.1.21, 10.6.2, and 11.0.0-alpha.6, the Storybook development server can expose its WebSocket authentication token to clients able to load its HTML pages over a local network. A LAN attacker can obtain the token and invoke WebSocket-backed file-writing or testing functionality. Weak story-write validation can allow code to be placed in story files. If the Storybook Vitest addon is installed with an old version of Vitest, the payload can use a Vitest API to write additional files or execute commands. Depending on the payload and local tooling, the attack can lead to code execution with the developer's privileges. This issue is fixed in 8.6.19, 9.1.21, 10.6.2, and 11.0.0-alpha.6.
References
security-advisories@github.comhttps://github.com/storybookjs/storybook/commit/243c06bf8f1e2f09446c44868ea100261e1374da
security-advisories@github.comhttps://github.com/storybookjs/storybook/commit/3be03ec6f11f4616471cebc3fc65c13e1bf8c178
security-advisories@github.comhttps://github.com/storybookjs/storybook/commit/5540f03b209cc56c66f56a9c7cb4b2ee5b883ce5
security-advisories@github.comhttps://github.com/storybookjs/storybook/commit/a9ef9345d73224c73e0b81dc2701ec5b465ea9bb
security-advisories@github.comhttps://github.com/storybookjs/storybook/commit/d9b09e332510a88689c71ecc081bbbc2d072476e
security-advisories@github.comhttps://github.com/storybookjs/storybook/commit/df3fed468c9b4830605f00068c4bc6b7e1e215ed
security-advisories@github.comhttps://github.com/storybookjs/storybook/pull/36726
security-advisories@github.comhttps://github.com/storybookjs/storybook/releases/tag/v10.6.2
security-advisories@github.comhttps://github.com/storybookjs/storybook/releases/tag/v11.0.0-alpha.6
security-advisories@github.comhttps://github.com/storybookjs/storybook/releases/tag/v8.6.19
security-advisories@github.comhttps://github.com/storybookjs/storybook/releases/tag/v9.1.21
security-advisories@github.comhttps://github.com/storybookjs/storybook/security/advisories/GHSA-px85-f4q5-jh77
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "storybook",
          "vendor": "storybookjs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 8.0.0, \u003c 8.6.19"
            },
            {
              "status": "affected",
              "version": "\u003e= 9.0.0, \u003c 9.1.21"
            },
            {
              "status": "affected",
              "version": "\u003e= 10.0.0, \u003c 10.6.2"
            },
            {
              "status": "affected",
              "version": "\u003e= 11.0.0-alpha.0, \u003c 11.0.0-alpha.6"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Storybook is a frontend workshop for building user interface components and pages in isolation. From 8.0.0 until 8.6.19, 9.1.21, 10.6.2, and 11.0.0-alpha.6, the Storybook development server can expose its WebSocket authentication token to clients able to load its HTML pages over a local network. A LAN attacker can obtain the token and invoke WebSocket-backed file-writing or testing functionality. Weak story-write validation can allow code to be placed in story files. If the Storybook Vitest addon is installed with an old version of Vitest, the payload can use a Vitest API to write additional files or execute commands. Depending on the payload and local tooling, the attack can lead to code execution with the developer\u0027s privileges. This issue is fixed in 8.6.19, 9.1.21, 10.6.2, and 11.0.0-alpha.6."
    }
  ],
  "id": "CVE-2026-114126",
  "lastModified": "2026-10-22T17:21:57.293",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "ADJACENT",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 8.7,
          "baseSeverity": "HIGH",
          "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": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "LOW",
          "subIntegrityImpact": "LOW",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/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": "HIGH",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-10-21T18:17:25.130",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/storybookjs/storybook/commit/243c06bf8f1e2f09446c44868ea100261e1374da"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/storybookjs/storybook/commit/3be03ec6f11f4616471cebc3fc65c13e1bf8c178"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/storybookjs/storybook/commit/5540f03b209cc56c66f56a9c7cb4b2ee5b883ce5"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/storybookjs/storybook/commit/a9ef9345d73224c73e0b81dc2701ec5b465ea9bb"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/storybookjs/storybook/commit/d9b09e332510a88689c71ecc081bbbc2d072476e"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/storybookjs/storybook/commit/df3fed468c9b4830605f00068c4bc6b7e1e215ed"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/storybookjs/storybook/pull/36726"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/storybookjs/storybook/releases/tag/v10.6.2"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/storybookjs/storybook/releases/tag/v11.0.0-alpha.6"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/storybookjs/storybook/releases/tag/v8.6.19"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/storybookjs/storybook/releases/tag/v9.1.21"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/storybookjs/storybook/security/advisories/GHSA-px85-f4q5-jh77"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        },
        {
          "lang": "en",
          "value": "CWE-94"
        },
        {
          "lang": "en",
          "value": "CWE-306"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    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.