CVE-2026-114126: Storybook is a frontend workshop for building user interface components and pages in isolation

This month

HIGH 8.7

CVE-2026-114126 is a high-severity flaw (CVSS 8.7) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 p

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.7 (High)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 59%)
CISA exploited list	No
Weakness	CWE-22, CWE-94, CWE-306
Published	2026-10-21
Last modified	2026-10-22

Publisher (CNA): GitHub, Inc.

Last updated 2026-10-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-10-21Published CVE record published
2026-10-22 17:21 UTCUpdated Record last modified

Exact fixes by distribution

npm · storybook · FIXED · 8.6.19 · vulnerable: >= 8.0.0, < 8.6.19 · source

npm install storybook@">=8.6.19" npm ls storybook

npm · @storybook/core · FIXED · 8.6.19 · vulnerable: >= 8.0.0, < 8.6.19 · source

npm install @storybook/core@">=8.6.19" npm ls @storybook/core

npm · @storybook/core-server · FIXED · 8.6.19 · vulnerable: >= 8.0.0, < 8.6.19 · source

npm install @storybook/core-server@">=8.6.19" npm ls @storybook/core-server

Fedora 46 · retext · FIXED · 8.1.0-1.fc46 · FEDORA-2026-0602a84203 · source

sudo dnf upgrade --advisory=FEDORA-2026-0602a84203

RHEL 10 · grafana · NOT AFFECTED

RHEL 9 · grafana · NOT AFFECTED

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-114126?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-114126 being exploited?

CVE-2026-114126 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-114126 affect?

CVE-2026-114126 affects affected software. Severity is high (CVSS 8.7). 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 c

How urgent is CVE-2026-114126?

Priority 41/100. High severity

References

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