CVE-2026-115895
validatedZero produced an exploit or a check.GHSA-834v-8h66-3h79 ↗EUVD-2026-109189 ↗
check availableZero validated a working check for it.not proven exploitableZero has a detection check, but hasn't produced a full working exploit yet.
cve.orgpublic pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).−3.1dkevAttacks confirmed in the real world.
npm:happy-dom >= 17.0.0, <= 21.0.3
fixed in 21.0.4
CWE-94 Improper Control of Generation of Code ('Code Injection')
ETK-2026-2206Zero's internal tracking ID, independent of the CVE number., permanent identifier
pkg:npm/happy-dom
+16h46mTTV
11mAI analysisAnalysis: how long the AI spent reversing this signal.
Check if you are vulnerable description
happy-dom versions 17.0.0 through 21.0.3 mishandle named ESM import aliases during module compilation. An attacker who can provide HTML or module source can cause JavaScript to execute in the Node.js host process when JavaScript evaluation is enabled.
mitigation
Upgrade happy-dom to =>21.0.4 or later.
fixed in 21.0.4
check
available
exploit
no
automationDeterministic: a check that runs on its own, the same request on every target. Contextual: an agentic technique that needs to be applied per target, for bugs that depend on contextual flows.
contextual
auth requiredWhether an attacker needs an account first, based on the CVSS vector's Privileges Required.
no
EPSSEstimate of the chance this CVE is exploited in the next 30 days. Refreshed daily.
–
agent run time
11m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
2026-10-23 21:32Z
Δ to public pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).
−3.1d
Δ to kevAttacks confirmed in the real world.
–
outcome
Contextual check: a technique exists and was validated, but no deterministic check could cover this one.
source signals
Public signals that triggered or updated the pipeline. These are inputs for the deltas above.
- 2026-10-20 18:13Zghsa: trigger signal, started the run
- 2026-10-20 18:13Z
- 2026-10-23 21:32Zcve.org record for CVE-2026-115895
this entry in the feed
GET /api/v1/feed/CVE-2026-115895
{ "etk_id": "ETK-2026-2206", "cve_id": "CVE-2026-115895", "display_id": "CVE-2026-115895", "ghsa_id": "GHSA-834v-8h66-3h79", "euvd_id": "EUVD-2026-109189", "status": "published", "anchor_state": "anchored", "title": "ESM import alias injection in happy-dom", "summary": "happy-dom versions 17.0.0 through 21.0.3 mishandle named ESM import aliases during module compilation. An attacker who can provide HTML or module source can cause JavaScript to execute in the Node.js host process when JavaScript evaluation is enabled.", "mitigation": "Upgrade happy-dom to =>21.0.4 or later.", "vendor": "npm", "product": "npm:happy-dom", "affected": [ { "affected_notes": [], "affected_ranges": [ ">= 17.0.0, <= 21.0.3" ], "ecosystem": "npm", "fixed_versions": [ "21.0.4" ], "package_name": "happy-dom", "purl": "pkg:npm/happy-dom" } ], "cwes": [ 94 ], "cvss_score": 8.8, "cvss_src": "cna_vendor", "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "epss_score": null, "epss_percentile": null, "epss_asof": null, "automation": "contextual", "check": true, "check_confidence_basis": "assessed", "exploit": false, "pipeline_minutes": 11.2248214, "t0_at": "2026-10-23T21:32:24.999000+00:00", "signals": { "check": { "at": "2026-10-24T14:18:15.490513+00:00", "days": 0.6985010591782408, "is_lower_bound": false, "measured_at": "2026-10-23T21:32:24.999000+00:00", "url": null }, "public_poc": { "at": "2026-10-20T18:13:05+00:00", "days": -3.138425914351852, "is_lower_bound": false, "measured_at": "2026-10-23T21:32:24.999000+00:00", "url": "https://github.com/capricorn86/happy-dom/security/advisories/GHSA-834v-8h66-3h79" }, "trigger_signal": { "at": "2026-10-20T18:13:05+00:00", "days": -3.138425914351852, "is_lower_bound": false, "measured_at": "2026-10-23T21:32:24.999000+00:00", "url": "https://github.com/capricorn86/happy-dom/security/advisories/GHSA-834v-8h66-3h79" } } }
published 2026-10-20 18:44Z
last change 2026-10-24 20:19Z
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