ETK-2026-124Zero's internal tracking ID, independent of the CVE number.
validatedZero produced an exploit or a check.description
Affected @nestjs/platform-fastify releases can dispatch a request to a route without running Nest middleware configured for that path when the request uses an absolute-form target. An attacker able to control the raw HTTP request line may bypass middleware-enforced authentication or authorization, or avoid other middleware controls, in applications that use path-scoped middleware.
mitigation
Upgrade @nestjs/platform-fastify to 12.0.2 or later on the 12.x line, or 11.2.4 or later on the 11.x line; 12.0.3 and 11.2.5 are recommended. Until upgraded, configure the application edge or Fastify instance to reject or normalize absolute-form request targets before middleware executes.
fixed in 11.2.4, 12.0.2
outcome
Mechanism verified: the exploit fired on the vulnerable build and stayed silent on the patched one, but the server it ran against was ours, so no check ships for it.
source signals
Public signals that triggered or updated the pipeline. These are inputs for the deltas above.
- 2026-09-30 14:41Zghsa: trigger signal, started the run
- 2026-09-30 14:41Z
this entry in the feed
GET /api/v1/feed/ETK-2026-124
{ "etk_id": "ETK-2026-124", "cve_id": null, "display_id": "ETK-2026-124", "ghsa_id": "GHSA-9c5c-9qcx-q35q", "euvd_id": null, "status": "published", "anchor_state": "awaiting_cve", "title": "Path-scoped middleware bypass in @nestjs/platform-fastify", "summary": "Affected @nestjs/platform-fastify releases can dispatch a request to a route without running Nest middleware configured for that path when the request uses an absolute-form target. An attacker able to control the raw HTTP request line may bypass middleware-enforced authentication or authorization, or avoid other middleware controls, in applications that use path-scoped middleware.", "mitigation": "Upgrade @nestjs/platform-fastify to 12.0.2 or later on the 12.x line, or 11.2.4 or later on the 11.x line; 12.0.3 and 11.2.5 are recommended. Until upgraded, configure the application edge or Fastify instance to reject or normalize absolute-form request targets before middleware executes.", "vendor": "npm", "product": "npm:@nestjs/platform-fastify", "affected": [ { "affected_notes": [], "affected_ranges": [ "< 11.2.4" ], "ecosystem": "npm", "fixed_versions": [ "11.2.4" ], "package_name": "@nestjs/platform-fastify", "purl": "pkg:npm/@nestjs/platform-fastify" }, { "affected_notes": [], "affected_ranges": [ ">= 12.0.0, < 12.0.2" ], "ecosystem": "npm", "fixed_versions": [ "12.0.2" ], "package_name": "@nestjs/platform-fastify", "purl": "pkg:npm/@nestjs/platform-fastify" } ], "cwes": null, "cvss_score": 7.4, "cvss_src": "cna_vendor", "cvss_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N", "epss_score": null, "epss_percentile": null, "epss_asof": null, "automation": "contextual", "check": true, "check_confidence_basis": "mechanism_verified", "exploit": false, "pipeline_minutes": 22.49533035, "t0_at": null, "signals": { "check": { "at": "2026-09-30T16:09:37.508266+00:00", "days": -20.622791184189815, "is_lower_bound": true, "measured_at": "2026-10-21T07:06:26.689428+00:00", "url": null }, "public_poc": { "at": "2026-09-30T14:41:39+00:00", "days": -20.683885029861113, "is_lower_bound": true, "measured_at": "2026-10-21T07:06:26.689428+00:00", "url": "https://github.com/advisories/GHSA-9c5c-9qcx-q35q" }, "trigger_signal": { "at": "2026-09-30T14:41:39+00:00", "days": -20.683885029861113, "is_lower_bound": true, "measured_at": "2026-10-21T07:06:26.689428+00:00", "url": "https://github.com/advisories/GHSA-9c5c-9qcx-q35q" } } }
published 2026-09-30 15:47Z
last change 2026-10-21 07:05Z
Need the technical details behind an entry?
Every entry here shows what we attempted and when. The technical details, the generated exploit that fired it and the evidence behind the verdict are not public. Tell us about your use case and we’ll get back to you about extended API access.