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Advisory record · GHSA-f2ph-cmg5-wxc8

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

CVSS 8.6 HighEPSS 0.0039 · 32nd percentile

Published by the GitHub Advisory Database at 21 Oct 2026, 17:23 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
storybooknpm>=8.0.0, <8.6.19 || >=9.0.0, <9.1.21 || >=10.0.0, <10.6.2 || >=11.0.0-alpha.0, <11.0.0-alpha.68.6.19, 9.1.21, 10.6.2, 11.0.0-alpha.6
@storybook/corenpm>=8.0.0, <8.6.198.6.19
@storybook/core-servernpm>=8.0.0, <8.6.198.6.19
@storybook/experimental-addon-testnpm>=8.0.0, <8.6.198.6.19
@storybook/addon-vitestnpm>=9.0.0, <9.1.21 || >=10.0.0, <10.6.2 || >=11.0.0-alpha.0, <11.0.0-alpha.69.1.21, 10.6.2, 11.0.0-alpha.6
@storybook/addon-mcpnpm>=10.6.0, <10.6.2 || >=11.0.0-alpha.0, <11.0.0-alpha.610.6.2, 11.0.0-alpha.6
Identifiers
GHSA-f2ph-cmg5-wxc8 · CVE-2026-114125
Weakness (CWE)
CWE-22 · CWE-94 · CWE-96 · CWE-346 · CWE-441 · CWE-749 · CWE-862 · CWE-1021
Tags
Published
21 Oct 2026
Updated
21 Oct 2026

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.6 High 4.0 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 CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0039, the 32nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 13:33 UTC First seen by agentprime
  2. 31 Oct 2026, 13:33 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.