Storybook: Missing origin validation in Storybook preview allows code injection from malicious websites

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-114125
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-21 18:17:24 UTC
Updated2026-10-21 18:17:24 UTC
DescriptionStorybook 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.

Risk And Classification

Primary CVSS: v4.0 8.6 HIGH from [email protected]

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/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

Problem Types: CWE-94 | CWE-346 | CWE-1021 | CWE-94 CWE-94: Improper Control of Generation of Code ('Code Injection') | CWE-346 CWE-346: Origin Validation Error | CWE-1021 CWE-1021: Improper Restriction of Rendered UI Layers or Frames

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary8.6HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/C...
4.0CNADECLARED8.6HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
Active
Confidentiality
High
Integrity
High
Availability
High
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

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/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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Storybookjs Storybook affected >= 8.0.0, < 8.6.19 Not specified
CNA Storybookjs Storybook affected >= 9.0.0, < 9.1.21 Not specified
CNA Storybookjs Storybook affected >= 10.0.0, < 10.6.2 Not specified
CNA Storybookjs Storybook affected >= 11.0.0-alpha.0, < 11.0.0-alpha.6 Not specified

References

ReferenceSourceLinkTags
github.com/storybookjs/storybook/commit/df3fed468c9b4830605f00068c4bc6b7... [email protected] github.com
github.com/storybookjs/storybook/releases/tag/v8.6.19 [email protected] github.com
github.com/storybookjs/storybook/releases/tag/v11.0.0-alpha.6 [email protected] github.com
github.com/storybookjs/storybook/releases/tag/v10.6.2 [email protected] github.com
github.com/storybookjs/storybook/releases/tag/v9.1.21 [email protected] github.com
github.com/storybookjs/storybook/commit/243c06bf8f1e2f09446c44868ea10026... [email protected] github.com
github.com/storybookjs/storybook/commit/97513d999910d071c2b36830495dab63... [email protected] github.com
github.com/storybookjs/storybook/commit/3be03ec6f11f4616471cebc3fc65c13e... [email protected] github.com
github.com/storybookjs/storybook/security/advisories/GHSA-f2ph-cmg5-wxc8 [email protected] github.com
github.com/storybookjs/storybook/pull/36726 [email protected] github.com
github.com/storybookjs/storybook/commit/d9b09e332510a88689c71ecc081bbbc2... [email protected] github.com
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