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October 2, 2026

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CVE-2025-55183NVD

Vulnerability Summary

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, 19.1.2, 19.2.0 and 19.2.1, including the following packages: react-server-dom-parcel, react-server-dom-turbopack, and react-server-dom-webpack. A specifically crafted HTTP request sent to a vulnerable Server Function may unsafely return the source code of any Server Function. Exploitation requires the existence of a Server Function which explicitly or implicitly exposes a stringified argument.
Severity Level
MEDIUM(5.3)
Published Date
Dec 11, 2025
Last Modified
Dec 12, 2025
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
Data Pending
Root Weakness (CWE)
N/A
CVSS v3.1 Base Metrics — Score 5.3 (MEDIUM)
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityLow
IntegrityNone
AvailabilityNone

Affected & Patched Versions

Affected Versions
  • Facebook React >= 19.0.0 and < 19.0.2
  • Facebook React >= 19.1.0 and < 19.1.3
  • Facebook React >= 19.2.0 and < 19.2.2
  • Vercel Next.js >= 15.0.0 and < 15.0.7
  • Vercel Next.js >= 15.1.0 and < 15.1.11
  • Vercel Next.js >= 15.2.0 and < 15.2.8
  • Vercel Next.js >= 15.3.0 and < 15.3.8
  • Vercel Next.js >= 15.4.0 and < 15.4.10
  • Vercel Next.js >= 15.5.0 and < 15.5.9
  • Vercel Next.js >= 16.0.0 and < 16.0.10
  • Vercel Next.js
Patched Versions
  • Facebook React 19.0.2
  • Facebook React 19.1.3
  • Facebook React 19.2.2
  • Vercel Next.js 15.0.7
  • Vercel Next.js 15.1.11
  • Vercel Next.js 15.2.8
  • Vercel Next.js 15.3.8
  • Vercel Next.js 15.4.10
  • Vercel Next.js 15.5.9
  • Vercel Next.js 16.0.10
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🎁7-Day Free Trial — Try Pro or Team, no card required.
📧Email Delivery — Threat intel straight to your inbox.
♾️Unlimited Vendors — Track your entire stack.
🚨All New CVEs — Be the first to know.
📈EPSS Spike Alerts — Catch rising risk before it peaks.
🎯Custom EPSS/CVSS — Filter noise, focus on risk.
🛡️Exploit Intel — A 2nd confirmed-exploit signal beyond KEV.
🐙GitHub Issues — Auto-tracked, no duplicates.
📬Weekly Digest — One clean summary, not inbox spam.
🏷️Watchlist Groups — Tag alerts by team (Infra/AppSec/SOC).
💬Webhooks — Slack & Teams integration.
🔀Smart Routing — Critical alerts to one channel, rest to another.
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External References