An information leak vulnerability exists in specific configurations of React Server Components versions 19.0.0, 19.0.1 19.1.0, 19.1.1, 19.1.

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• facebook react19.2.0 and later · before 19.2.2
• facebook react19.1.0 and later · before 19.1.3
• facebook react19.0.0 and later · before 19.0.2
• vercel next.js15.3.0 and later · before 15.3.8
• vercel next.js15.4.0 and later · before 15.4.10
• vercel next.js15.5.0 and later · before 15.5.9
• vercel next.js15.0.0 and later · before 15.0.7
• vercel next.js16.0.0 and later · before 16.0.10
• vercel next.js15.1.0 and later · before 15.1.11
• vercel next.js15.2.0 and later · before 15.2.8
• vercel next.js15.6.0
• vercel next.js16.1.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Meta). Independent of NVD's CPE analysis and usually ahead of it.

• Meta react-server-dom-parcel

  • 19.0.0 and later · up to and including 19.0.1affected · semver
  • 19.1.0 and later · up to and including 19.1.2affected · semver
  • 19.2.0 and later · up to and including 19.2.1affected · semver

• Meta react-server-dom-turbopack

  • 19.0.0 and later · up to and including 19.0.1affected · semver
  • 19.1.0 and later · up to and including 19.1.2affected · semver
  • 19.2.0 and later · up to and including 19.2.1affected · semver

• Meta react-server-dom-webpack

  • 19.0.0 and later · up to and including 19.0.1affected · semver
  • 19.1.0 and later · up to and including 19.1.2affected · semver
  • 19.2.0 and later · up to and including 19.2.1affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Other highest-scoring records for the same primary product.

• CVE-2025-29927Authorization Bypass in Next.js Middleware
  66This week
• CVE-2024-46982Cache Poisoning in next.js
  48Plan
• CVE-2021-43803Unexpected server crash in Next.js
  43Plan
• CVE-2026-75604Next.js: Unauthenticated Remote Code Execution on windows-hosted servers
  37Monitor
• CVE-2026-44578Next.js: Server-side request forgery in applications using WebSocket upgrades
  35Monitor
• CVE-2026-64649Next.js: Server-Side Request Forgery in Server Actions on Custom Servers
  33Monitor

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

Data received over the network is deserialized into the language’s native object format without verifying its source. Code paths inside the object can be triggered during deserialization.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1payload = sock.recv(65536)2job = pickle.loads(payload)

1payload = sock.recv(65536)2if not hmac.compare_digest(sign(payload), header_sig):3    raise PermissionError("invalid signature")4job = JobSchema.validate(json.loads(payload))

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.