High 8.6Published Oct 21, 2026

CVE-2026-114125Storybook: Missing origin validation in Storybook preview allows code injection from malicious websites

Updated under an hour ago (Oct 28, 2026, 6:40 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 0.39%, higher than 32% 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, a malicious website can interact with the preview of a running Storybook development server. Insufficient iframe embedding and message-origin restrictions can allow attacker-controlled events to reach the running preview. A developer must visit the malicious website and interact with the injected interface. The attack can cause unauthorized changes to story files and, if a changed file is later executed by a local runtime, arbitrary 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: 8.6 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Weakness (CWE): CWE-94, CWE-346, CWE-1021
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.39% (percentile 32)
Assigned by: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Oct 21, 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-f2ph-cmg5-wxc8	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/97513d999910d071c2b36830495dab63e17d9fe0	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
https://github.com/storybookjs/storybook/releases/tag/v8.6.19	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.