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CVE-2026-114125

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

CVSS score

8.6

EPSS probability

—

Risk score

0.9

Published

2 h ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

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Impact on My Inventory

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Vulnerability description

DayBreach CVE AI Research

CVE-2026-114125 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

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.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-114125 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1storybookjsstorybook View
2npmstorybook View
3npmstorybook View
4npmstorybook View
5npmstorybook View
6npm@storybook/core View
7npm@storybook/core-server View
8npm@storybook/experimental-addon-test View
9npm@storybook/addon-vitest View
10npm@storybook/addon-vitest View
11npm@storybook/addon-vitest View
12npm@storybook/addon-mcp View
13npm@storybook/addon-mcp View
Total affected vendors: 2|Products: 13

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
9.4CVSS 4.0—Vector not publishedGitHub Advisory
8.6CVSS V4_0HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:NCVE CNA
8.6CVSS V40HIGHCVSS: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:XNVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

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Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-114125 is associated with the following CWEs:

CWE-94: Improper Control of Generation of Code ('Code Injection')CWE-346: Common Weakness Enumeration Entry CWE-346CWE-1021: Common Weakness Enumeration Entry CWE-1021CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')CWE-96: Common Weakness Enumeration Entry CWE-96CWE-441: Common Weakness Enumeration Entry CWE-441CWE-749: Common Weakness Enumeration Entry CWE-749CWE-862: Common Weakness Enumeration Entry CWE-862

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-114125 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsGerekmiyor
User—

Official Sources and Advisories

https://github.com/storybookjs/storybook/releases/tag/v10.6.2vendor-advisoryhttps://github.com/storybookjs/storybook/releases/tag/v11.0.0-alpha.6vendor-advisoryhttps://github.com/storybookjs/storybook/releases/tag/v8.6.19vendor-advisoryhttps://github.com/storybookjs/storybook/releases/tag/v9.1.21vendor-advisoryhttps://github.com/storybookjs/storybook/commit/a9ef9345d73224c73e0b81dc2701ec5b465ea9bbvendor-advisoryhttps://github.com/advisories/GHSA-f2ph-cmg5-wxc8vendor-advisoryhttps://github.com/storybookjs/storybook/security/advisories/GHSA-f2ph-cmg5-wxc8vendor-advisoryhttps://github.com/storybookjs/storybook/pull/36726vendor-advisoryhttps://github.com/storybookjs/storybook/commit/243c06bf8f1e2f09446c44868ea100261e1374davendor-advisoryhttps://github.com/storybookjs/storybook/commit/3be03ec6f11f4616471cebc3fc65c13e1bf8c178vendor-advisory

CVSS Vector Radar Chart

8.6 / 10
Attack VectorNetworkComplexityLowPrivilegesNoneUser Interact.RequiredConfidentialityLowIntegrityNoneAvailabilityHigh

Vulnerability Scoring Details

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
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone required
User InteractionA
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)A
Availability (Erişilebilirlik)High

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Follow the vendor

S
storybookjs logo
storybookjs
N
npm logo
npm

Weakness Type (CWE & CAPEC)

CWE-94 CWE-346 CWE-1021 CWE-22 CWE-96 CWE-441 CWE-749 CWE-862

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CVE-2026-114125 · Storybook: Missing origin validation in…