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TI-2025-42665 Aliases CVE-2025-69211GHSA-8wpr-639p-ccrj

Nest has a Fastify URL Encoding Middleware Bypass (TOCTOU)

Priority HIGH 66CWE-367Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.

Summary

Nest is a framework for building scalable Node.js server-side applications. Versions prior to 11.1.11 have a Fastify URL encoding middleware bypass. A NestJS application is vulnerable if it uses `@nestjs/platform-fastify`; relies on `NestMiddleware` (via `MiddlewareConsumer`) for security checks (authentication, authorization, etc.), or through `app.use()`; and applies middleware to specific routes using string paths or controllers (e.g., `.forRoutes('admin')`). Exploitation can result in unauthenticated users accessing protected routes, restricted administrative endpoints becoming accessible to lower-privileged users, and/or middleware performing sanitization or validation being skipped. This issue is patched in `@nestjs/[email protected]`.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00382 32nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed nest (nestjs): 11.1.11@nestjs/platform-fastify (npm): 11.1.11

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
nestjsnestbefore 11.1.1111.1.11Patch availableCNA
—@nestjs/platform-fastify (npm)before 11.1.1111.1.11Patch availableGHSA-8wpr-639p-ccrj
  • nest Vendornestjs Affected before 11.1.11 Fixed in 11.1.11 Patch available CNA
  • @nestjs/platform-fastify (npm) Vendor— Affected before 11.1.11 Fixed in 11.1.11 Patch available GHSA-8wpr-639p-ccrj

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:nestjs:nest:*:*:*:*:*:node.js:*:*before 11.1.11Vulnerablenestjs
  • cpe:2.3:a:nestjs:nest:*:*:*:*:*:node.js:*:* Versions before 11.1.11 Vulnerable ·nestjs

Remediation

  • Fix · CNA nest (nestjs) Fixed in 11.1.11
  • Fix · GHSA-8wpr-639p-ccrj @nestjs/platform-fastify (npm) Fixed in 11.1.11 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat OpenShift Container Platform 4

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-69211
  2. 2026-10-03 Alias added: GHSA-8wpr-639p-ccrj

References

Exploit 1

Patch 1

Advisory 1

Other 1

  • TI-2026-01938 NestJS 11.1.13 - Lack of data validation allowing authentication/authorization bypass CVSS 4.0HIGH 8.2
  • TI-2024-19449 File Upload vulnerability in nestjs nest v.10.3.2 allows a remote attacker to execute… CVSS 3.1MEDIUM 5.5
  • TI-2026-25458 Nest Fastify HEAD Request Middleware Bypass CVSS 4.0HIGH 8.7
  • TI-2026-29535 Nest: DoS via Recursive handleData in JsonSocket (TCP Transport) CVSS 3.1HIGH 7.5
  • TI-2026-27632 @nestjs/core Improperly Neutralizes Special Elements in Output Used by a Downstream Component ('Injection') CVSS 4.0MEDIUM 6.3
  • TI-2023-11333 Information disclosure in @nestjs/core CVSS 3.1MEDIUM 5.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences