High 8.7Published Oct 21, 2026

CVE-2026-114126Storybook dev server: devices on the same network can obtain the WebSocket token and write code into story files

Updated under an hour ago (Oct 28, 2026, 4:30 AM ET)

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It affects storybookjs storybook. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.53%, higher than 44% of scored CVEs.

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Every CVE for storybookjs storybook

Exploited in the last 30 days

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.

CVSS: 8.7 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-22, CWE-94, CWE-306
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.53% (percentile 44)
Assigned by: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Oct 27, 2026
First seen by InfoSec Signals: Oct 21, 2026

Affected products

Affected products

storybookjs storybook storybookjs:storybook (from the name)	from 8.0.0, < 8.6.19; from 9.0.0, < 9.1.21; from 10.0.0, < 10.6.2; from 11.0.0-alpha.0, < 11.0.0-alpha.6	CNA record

References

References

https://github.com/storybookjs/storybook/security/advisories/GHSA-px85-f4q5-jh77	x-refsource-confirm
https://github.com/storybookjs/storybook/pull/36726	x-refsource-misc
https://github.com/storybookjs/storybook/commit/243c06bf8f1e2f09446c44868ea100261e1374da	x-refsource-misc
https://github.com/storybookjs/storybook/commit/3be03ec6f11f4616471cebc3fc65c13e1bf8c178	x-refsource-misc
https://github.com/storybookjs/storybook/commit/5540f03b209cc56c66f56a9c7cb4b2ee5b883ce5	x-refsource-misc
https://github.com/storybookjs/storybook/commit/a9ef9345d73224c73e0b81dc2701ec5b465ea9bb	x-refsource-misc
https://github.com/storybookjs/storybook/commit/d9b09e332510a88689c71ecc081bbbc2d072476e	x-refsource-misc
https://github.com/storybookjs/storybook/commit/df3fed468c9b4830605f00068c4bc6b7e1e215ed	x-refsource-misc
https://github.com/storybookjs/storybook/releases/tag/v10.6.2	x-refsource-misc
https://github.com/storybookjs/storybook/releases/tag/v11.0.0-alpha.6	x-refsource-misc
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.