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VulnerabilityCVE-2026-23870Published 2026-05-06

CVE-2026-23870 — Meta react-server-dom-turbopack

highPublic exploit2 PoC repos

As of 2026-05-06, CVE-2026-23870 is a HIGH-severity vulnerability in Meta react-server-dom-turbopack, CVSS v3.1 7.5, EPSS 1.5% (74.0th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-23870, most recently “React Server Components DoS Vulnerability (CVE-2026-23870) Lets Attackers Freeze Next.js Servers With a Single POST Request”.

CVSS v3.1
7.5/10High
EPSS
1.5%Higher than 74.0% of scored CVEs
CISA KEV
NoNot in the KEV catalog
Tracked threats
1Campaigns referencing it
Priority
8.7/10Threadlinqs triage score
Published
CVSS v3.1 7.5 (HIGH) · EPSS 1.5% (higher than 74.0% of all scored CVEs) · Priority 8.7/10 · Published 2026-05-06

Last updated:

What is CVE-2026-23870?

A denial of service vulnerability could be triggered by sending specially crafted HTTP requests to server function endpoints, this could lead to server crashes, out-of-memory exceptions or excessive CPU usage; affecting the following packages: react-server-dom-webpack, react-server-dom-parcel, react-server-dom-turbopack (versions 19.0.0 through 19.0.5, 19.1.0 through 19.1.6, and 19.2.0 through 19.2.5).

Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on availability. 3 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 157 days ago.

Severity and exploitation probability

CVSS v3.1 base score
7.5 — HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS (FIRST)
1.5% probability of exploitation in the next 30 days, higher than 74.0% of all scored CVEs
CISA KEV
Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority
8.7/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published
2026-05-06

Is CVE-2026-23870 being exploited?

Weaponised exploit code for CVE-2026-23870 is publicly available. 2 public proof-of-concept repositories are tracked for this identifier. It currently carries a trending score of 32 in the Threadlinqs vulnerability feed.

Affected products and versions

  • Meta: react-server-dom-turbopack, react-server-dom-parcel, react-server-dom-webpack

Affected software packages:

  • npm:react-server-dom-parcel — patched in 19.0.6
  • npm:react-server-dom-turbopack — patched in 19.0.6
  • npm:react-server-dom-webpack — patched in 19.0.6
  • npm:react-server-dom-parcel — patched in 19.1.7
  • npm:react-server-dom-turbopack — patched in 19.1.7
  • npm:react-server-dom-webpack — patched in 19.1.7
  • npm:react-server-dom-parcel — patched in 19.2.6
  • npm:react-server-dom-turbopack — patched in 19.2.6
  • npm:react-server-dom-webpack — patched in 19.2.6

How to fix CVE-2026-23870

Fixed versions are recorded for 9 packages: npm:react-server-dom-parcel 19.0.6, npm:react-server-dom-turbopack 19.0.6, npm:react-server-dom-webpack 19.0.6, npm:react-server-dom-parcel 19.1.7, npm:react-server-dom-turbopack 19.1.7, npm:react-server-dom-webpack 19.1.7, npm:react-server-dom-parcel 19.2.6, npm:react-server-dom-turbopack 19.2.6, npm:react-server-dom-webpack 19.2.6. No vendor patch reference has been recorded for CVE-2026-23870 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

Threat activity tracking CVE-2026-23870

1 tracked threat in the Threadlinqs corpus references CVE-2026-23870, either in the campaign’s CVE list or as an indicator on the campaign record.

Sources

Enriched from CVE.org, FIRST EPSS, GitHub Security Advisories, public proof-of-concept repositories. Last verified by Threadlinqs on .

Vendor advisory and patch