happy-dom is a JavaScript implementation of a web browser without its graphical user interface. Versions of happy-dom prior to 15.10.2 may execute code on the host via a script tag. This would execute code in the user context of happy-dom. Users are advised to upgrade to version 15.10.2. There are no known workarounds for this vulnerability.
CVE-2024-51757
“—” beside the score: it is equal to NVD's CVSS score.
This critical-severity CVE scores 9.3 under NVD CVSS. EPSS exploit probability: 0.8% (56th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.
Also known asEUVD-2024-3226 (ENISA EUVD) · GHSA-96g7-g7g9-jxw8 (GitHub Security Advisories)Source: ENISA EUVD
- CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
A fix is available — apply it.
- CVSS
- 9.3
- EG Score
- 9.3CRITICALmedium confidence
- EG Risk
- 73EG Risk 73/100
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)Severity93% × 45%Impact severity (EG Severity): CVSS 9.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation40% × 40%EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.Automatability100% × 15%CISA's SSVC Automatable value: yes (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.Exploitation public PoC (CISA Vulnrichment) · Automatable yes (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 at low or medium mission impact and sooner than that at high. - EPSS PROB
- 0.8%
- EPSS %ILE
- 56th
- 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 (9.3): severity, escalated by confirmed exploitation. This CVE's 9.3 is its impact severity (EG Severity), not escalated.
- EG Severity
- 9.3 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS
- EG Likelihood
- 0.8% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-12). 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, Track* at medium and Attend at high mission impact.CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days 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, Track* at medium and Attend at high mission impact.
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (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)3 days if the affected system is publicly exposed; 60 days if it is not.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (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
November 6, 2024
Last Modified
April 15, 2026
Advisory Details (6)
Auto-updated Sep 15, 2026Fixes security vulnerability that allowed for server side code to be executed by a <script> tag · Advisory · capricorn86/happy-dom · GitHub
Affected: v15.10.1
https://github.com/capricorn86/happy-dom/security/advisories/GHSA-96g7-g7g9-jxw8v15.10.2
Patch available: capricorn86/happy-dom v15.10.2
https://github.com/capricorn86/happy-dom/releases/tag/v15.10.2fix: [#1585] Fixes security vulnerability that allowed for server side code to be executed by a <script> tag
Patch available: capricorn86/happy-dom v20.10.5 (PR #1586 merged 2024-11-06)
https://github.com/capricorn86/happy-dom/pull/1586Security vulnerability that allows for scripts to execute on the server · Issue #1585 · capricorn86/happy-dom · GitHub
https://github.com/capricorn86/happy-dom/issues/1585commit d23834c232f1 (capricorn86/happy-dom)
Patch available: capricorn86/happy-dom v20.10.5 (contains commit d23834c232f1)
https://github.com/capricorn86/happy-dom/commit/d23834c232f1cf5519c9418b073f1dcec6b2f0fdcommit 5ee0b1676d4c (capricorn86/happy-dom)
Patch available: capricorn86/happy-dom v20.10.5 (contains commit 5ee0b1676d4c)
https://github.com/capricorn86/happy-dom/commit/5ee0b1676d4ce20cc2a70d1c9c8d6f1e3f57efacVendor Advisories for CVE-2024-51757(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Patch Availability(1)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| npm | happy-dom @ 15.10.2 (fixes < 15.10.2) | — | 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
(1 across 1 ecosystem)
npm(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| happy-dom | — |
| — |
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 14× in last 7d / 44× 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.
Showing the most recent 100 of 288 rows on record for this CVE, as 99 entries (1 repeat merged).
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 188 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-11-13 16:47 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-11-13 15:36 UTCEchelonGraph re-scored
- 2026-11-13 15:36 UTCGHSA enrichmentGHSA-96g7-g7g9-jxw8 · GitHub severity CRITICAL
- 2026-11-12 16:31 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-11-12 15:06 UTCEchelonGraph re-scored
- 2026-11-12 15:06 UTCGHSA enrichmentGHSA-96g7-g7g9-jxw8 · GitHub severity CRITICAL
- 2026-11-11 16:35 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-11-11 14:38 UTCEchelonGraph re-scored
- 2026-11-11 14:38 UTCGHSA enrichmentGHSA-96g7-g7g9-jxw8 · GitHub severity CRITICAL
- 2026-11-10 16:39 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-11-10 14:10 UTCEchelonGraph re-scored
- 2026-11-10 14:10 UTCGHSA enrichmentGHSA-96g7-g7g9-jxw8 · GitHub severity CRITICAL
- 2026-11-09 16:32 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-11-09 13:41 UTCEchelonGraph re-scored
- 2026-11-09 13:41 UTCGHSA enrichmentGHSA-96g7-g7g9-jxw8 · GitHub severity CRITICAL
- 2026-11-08 16:36 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-11-08 13:13 UTCEchelonGraph re-scored
- 2026-11-08 13:13 UTCGHSA enrichmentGHSA-96g7-g7g9-jxw8 · GitHub severity CRITICAL
- 2026-11-07 16:36 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-11-07 12:44 UTCEchelonGraph re-scored
- 2026-11-07 12:44 UTCGHSA enrichmentGHSA-96g7-g7g9-jxw8 · GitHub severity CRITICAL
- 2026-11-06 16:32 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-11-06 12:16 UTCEchelonGraph re-scored
- 2026-11-06 12:16 UTCGHSA enrichmentGHSA-96g7-g7g9-jxw8 · GitHub severity CRITICAL
- 2026-11-05 16:34 UTCEPSS rescoreEPSS 0.8% · 55th percentile
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- 2026-11-05 11:48 UTCEchelonGraph re-scored
- 2026-11-05 11:48 UTCGHSA enrichmentGHSA-96g7-g7g9-jxw8 · GitHub severity CRITICAL
- 2026-11-05 04:25 UTCOSV refresh
- 2026-11-04 16:32 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-11-04 11:20 UTCEchelonGraph re-scored
- 2026-11-04 11:20 UTCGHSA enrichmentGHSA-96g7-g7g9-jxw8 · GitHub severity CRITICAL
- 2026-11-03 16:43 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-11-03 10:51 UTCEchelonGraph re-scored
- 2026-11-03 10:51 UTCGHSA enrichmentGHSA-96g7-g7g9-jxw8 · GitHub severity CRITICAL
- 2026-11-02 16:41 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-11-02 10:23 UTCEchelonGraph re-scored
- 2026-11-02 10:23 UTCGHSA enrichmentGHSA-96g7-g7g9-jxw8 · GitHub severity CRITICAL
- 2026-11-01 09:51 UTCGHSA enrichmentGHSA-96g7-g7g9-jxw8 · GitHub severity CRITICAL
- 2026-11-01 08:11 UTCGHSA enrichmentGHSA-96g7-g7g9-jxw8 · GitHub severity CRITICAL
- 2026-11-01 08:11 UTCEchelonGraph re-scored
- 2026-10-31 16:30 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-10-31 09:24 UTCEchelonGraph re-scored
- 2026-10-30 16:32 UTCEPSS rescoreEPSS 0.8% · 55th percentile
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- 2026-10-26 16:29 UTCEPSS rescoreEPSS 0.8% · 55th percentile
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- 2026-10-20 16:30 UTCEPSS rescoreEPSS 0.8% · 54th percentile
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- 2026-10-18 06:53 UTCEchelonGraph re-scored
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- 2026-10-17 16:31 UTCEPSS rescoreEPSS 0.8% · 54th percentile
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- 2026-10-16 16:37 UTCEPSS rescoreEPSS 0.8% · 54th percentile
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- 2026-10-15 16:30 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-10-14 16:30 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-10-14 14:44 UTCEchelonGraph re-scored
- 2026-10-13 16:31 UTCEPSS rescoreEPSS 0.8% · 54th percentile
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- 2026-10-12 16:31 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-10-11 21:06 UTCEchelonGraph re-scored
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- 2026-10-11 13:46 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-10-10 23:17 UTCOSV refresh
- 2026-10-10 19:58 UTCEPSS rescoreEPSS 0.8% · 54th percentile
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- 2026-10-03 14:24 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-10-02 16:19 UTCEchelonGraph re-scored
- 2026-10-01 19:48 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
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- 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
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- 2026-09-26 15:57 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-09-24 14:01 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-09-23 13:46 UTCEPSS rescoreEPSS 0.8% · 54th percentile
Related CVEs(same product + same CWE)
Same product
7 shownnpm:happy-dom
Frequently asked(5)
What is CVE-2024-51757?
When was the CVE record for CVE-2024-51757 published?
Is CVE-2024-51757 actively exploited?
What is the CVSS score of CVE-2024-51757?
How do I remediate CVE-2024-51757?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2024-51757
Is Your Infrastructure Affected by CVE-2024-51757?
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