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.
CVE-2026-114125
“—” beside the score: it is equal to the CVSS score beside it.
This high-severity CVE scores 8.6 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (33rd percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.
Also known asEUVD-2026-107393 (ENISA EUVD) · GHSA-f2ph-cmg5-wxc8 (GitHub Security Advisories)Source: ENISA EUVD
- High severity, but no confirmed exploitation yet
A fix is available — apply it.
- CVSS
- 8.6
- EG Score
- 8.6HIGHmedium confidence
- EG Risk
- 39EG Risk 39/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity86% × 45%Impact severity (EG Severity): CVSS 8.6 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation0.4% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability0% × 15%CISA's SSVC Automatable value: no (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines. - EPSS PROB
- 0.4%
- EPSS %ILE
- 33rd
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (8.6): severity, escalated by confirmed exploitation. This CVE's 8.6 is its impact severity (EG Severity), not escalated.
- EG Severity
- 8.6 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source
- EG Likelihood
- 0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-10). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
October 21, 2026
Last Modified
October 28, 2026
Advisory Details (8)
Auto-updated Oct 21, 2026v8.6.19
Patch available: storybookjs/storybook v8.6.19
https://github.com/storybookjs/storybook/releases/tag/v8.6.19v11.0.0-alpha.6
Patch available: storybookjs/storybook v11.0.0-alpha.6 (pre-release)
https://github.com/storybookjs/storybook/releases/tag/v11.0.0-alpha.6v10.6.2
Patch available: storybookjs/storybook v10.6.2
https://github.com/storybookjs/storybook/releases/tag/v10.6.2commit df3fed468c9b (storybookjs/storybook)
Patch available: storybookjs/storybook v8.6.19 (contains commit df3fed468c9b)
https://github.com/storybookjs/storybook/commit/df3fed468c9b4830605f00068c4bc6b7e1e215edcommit 97513d999910 (storybookjs/storybook)
Patch available: storybookjs/storybook v11.0.0-alpha.6 (contains commit 97513d999910)
https://github.com/storybookjs/storybook/commit/97513d999910d071c2b36830495dab63e17d9fe0commit 3be03ec6f11f (storybookjs/storybook)
Patch available: storybookjs/storybook v9.1.21 (contains commit 3be03ec6f11f)
https://github.com/storybookjs/storybook/commit/3be03ec6f11f4616471cebc3fc65c13e1bf8c178Security: Patch GHSA-f2ph-cmg5-wxc8 and GHSA-px85-f4q5-jh77
Patch available: storybookjs/storybook v11.0.0-alpha.6 (PR #36726 merged 2026-10-12)
https://github.com/storybookjs/storybook/pull/36726Storybook dev server preview allows code injection from malicious websites · Advisory · storybookjs/storybook · GitHub
https://github.com/storybookjs/storybook/security/advisories/GHSA-f2ph-cmg5-wxc8Vendor Advisories for CVE-2026-114125(3)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- RHSA-2026:88541Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update
- RHSA-2026:88537Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update
- GHSA-f2ph-cmg5-wxc8GitHub Security AdvisoriesCritical
Storybook: Missing origin validation in Storybook preview allows code injection from malicious websites
Patch Availability(7)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| redhat | grafana12-4-main-12.4.13-0.3.hum1 | 2026-10-23 | redhat |
| redhat | grafana13-1-main-13.1.8-0.4.hum1 | 2026-10-23 | redhat |
| redhat | grafana13-2-main-13.2.4-0.3.hum1 | 2026-10-23 | redhat |
| npm | storybook @ 8.6.19 (fixes >= 8.0.0, < 8.6.19) | — | ghsa |
| npm | storybook @ 9.1.21 (fixes >= 9.0.0, < 9.1.21) | — | ghsa |
| npm | storybook @ 10.6.2 (fixes >= 10.0.0, < 10.6.2) | — | ghsa |
| npm | storybook @ 11.0.0-alpha.6 (fixes >= 11.0.0-alpha.0, < 11.0.0-alpha.6) | — | ghsa |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(6 across 1 ecosystem)
npm(6)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| storybook | — |
| — |
| @storybook/addon-mcp | — |
| — |
| @storybook/addon-vitest | — |
| — |
| @storybook/core | — |
| — |
| @storybook/core-server | — |
| — |
| @storybook/experimental-addon-test | — |
| — |
Weakness Classification(8)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
- CWE-1021Improper Restriction of Rendered UI Layers or Frames (Clickjacking)
- CWE-22Path Traversal
- CWE-346Origin Validation Error
- CWE-441Unintended Proxy or Intermediary (Confused Deputy)
- CWE-749Exposed Dangerous Method or Function
- CWE-862Missing Authorization
- CWE-94Improper Control of Generation of Code (Code Injection)
- CWE-96Improper Neutralization of Directives in Statically Saved Code ('Static Code Injection')
Additional Vendor Advisories
(1)
Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.
Data Freshness Timeline
(refreshed 11× in last 7d / 32× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.
- 2026-11-12 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-11-11 16:38 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-11-11 03:36 UTCEchelonGraph re-scored
- 2026-11-11 03:36 UTCVendor advisory
- 2026-11-11 03:36 UTCGHSA enrichmentGHSA-f2ph-cmg5-wxc8 · GitHub severity CRITICAL
- 2026-11-10 16:42 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-11-10 09:48 UTCEchelonGraph re-scored
- 2026-11-10 09:48 UTCVendor advisory
- 2026-11-10 09:48 UTCGHSA enrichmentGHSA-f2ph-cmg5-wxc8 · GitHub severity CRITICAL
- 2026-11-09 16:34 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-11-08 16:38 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-11-07 16:38 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-11-06 16:36 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-11-05 16:36 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-11-04 16:34 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-11-03 20:02 UTCEchelonGraph re-scored
- 2026-11-03 20:02 UTCGHSA enrichmentGHSA-f2ph-cmg5-wxc8 · GitHub severity CRITICAL
- 2026-11-03 16:46 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-11-02 16:44 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-11-01 07:59 UTCGHSA enrichmentGHSA-f2ph-cmg5-wxc8 · GitHub severity CRITICAL
- 2026-11-01 07:59 UTCEchelonGraph re-scored
- 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
Show 18 moreShow fewer
- 2026-10-28 18:50 UTCEchelonGraph re-scored
- 2026-10-28 18:50 UTCVendor advisory
- 2026-10-28 17:21 UTCEchelonGraph re-scored
- 2026-10-28 17:21 UTCVendor advisory
- 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-10-27 20:43 UTCEchelonGraph re-scored
- 2026-10-27 20:43 UTCVendor advisory
- 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-10-25 14:50 UTCEchelonGraph re-scored
- 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-10-22 17:29 UTCEchelonGraph re-scored
- 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.4% · 30th percentile
- 2026-10-21 18:26 UTCEchelonGraph re-scored
- 2026-10-21 17:21 UTCEchelonGraph re-scoredFirst assessed: 8.6 HIGH
- 2026-10-21 17:20 UTCMITRE cvelistV5first tracked
Related CVEs(same product + same vendor + same CWE)
Same product
3 shownnpm:@storybook/addon-mcp · npm:storybook
Same vendor
5 shownredhat:RHSA-2026:88478 · redhat:RHSA-2026:88537 · redhat:RHSA-2026:88541
Same CWE
10 shownCWE-22 · CWE-346 · CWE-749
Frequently asked(5)
What is CVE-2026-114125?
When was the CVE record for CVE-2026-114125 published?
Is CVE-2026-114125 actively exploited?
What is the CVSS score of CVE-2026-114125?
How do I remediate CVE-2026-114125?
Dependency Blast Radius
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