A pre-authentication denial of service vulnerability exists in React Server Components versions 19.0.0, 19.0.1 19.1.0, 19.1.1, 19.1.2, 19.2.

Affected versions

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

• facebook react19.0.0 and later · before 19.0.2
• facebook react19.1.0 and later · before 19.1.3
• facebook react19.2.0 and later · before 19.2.2
• vercel next.js13.3.0 and later · before 14.2.35
• vercel next.js15.0.0 and later · before 15.0.7
• vercel next.js15.1.0 and later · before 15.1.11
• vercel next.js15.2.0 and later · before 15.2.8
• vercel next.js15.3.0 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.js16.0.0 and later · before 16.0.10
• 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-2025-55182A pre-authentication remote code execution vulnerability exists in React Server Components versions 19.0.0, 19.1.0, 19.1.1, and 19.2.0 incluKEV
  100Now
• CVE-2025-67779It was found that the fix addressing CVE-2025-55184 in React Server Components was incomplete and does not prevent a denial of service attac
  36Monitor
• CVE-2026-23864Multiple denial of service vulnerabilities exist in React Server Components, affecting the following packages: react-server-dom-parcel, reac
  31Monitor
• CVE-2018-6341React applications which rendered to HTML using the ReactDOMServer API were not escaping user-supplied attribute names at render-time.
  25Monitor

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.