CVE-2026-23869

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 1.6%, top 27% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Elevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.6%CVSS: 7.5Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

A denial of service vulnerability exists in React Server Components, affecting the following packages: react-server-dom-parcel, react-server-dom-turbopack and react-server-dom-webpack (versions 19.0.0 through 19.0.4, 19.1.0 through 19.1.5, and 19.2.0 through 19.2.4). The vulnerability is triggered by sending specially crafted HTTP requests to Server Function endpoints.The payload of the HTTP request causes excessive CPU usage for up to a minute ending in a thrown error that is catchable.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation2% × 40%
Automatability100% × 15%
EPSS PROB
1.6%
EPSS %ILE
74th
KEV
Not listed

Published

April 8, 2026

Last Modified

July 25, 2026

Advisory Details (1)

Auto-updated Jun 15, 2026
Patch available. Sources: github.
githubMentions a patch (unverified)

Denial of Service Vulnerability in React Server Components · Advisory · react/react · GitHub

https://github.com/facebook/react/security/advisories/GHSA-479c-33wc-g2pg

Affected Packages

(3 across 1 ecosystem)
npm(3)
PackageVulnerable rangeFix by version rangeDependents
react-server-dom-parcel—
  • 19.0.0 up to 19.0.5: fixed in 19.0.5
  • 19.1.0 up to 19.1.6: fixed in 19.1.6
  • 19.2.0 up to 19.2.5: fixed in 19.2.5
—
react-server-dom-turbopack—
  • 19.0.0 up to 19.0.5: fixed in 19.0.5
  • 19.1.0 up to 19.1.6: fixed in 19.1.6
  • 19.2.0 up to 19.2.5: fixed in 19.2.5
—
react-server-dom-webpack—
  • 19.0.0 up to 19.0.5: fixed in 19.0.5
  • 19.1.0 up to 19.1.6: fixed in 19.1.6
  • 19.2.0 up to 19.2.5: fixed in 19.2.5
—

Weakness Classification(3)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 23× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 199 total refreshes for this CVE.

  1. 2026-10-10 21:47 UTCOSV refresh
  2. 2026-10-10 20:00 UTCEPSS rescore
  3. 2026-10-09 20:07 UTCEPSS rescore
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  22. 2026-08-16 07:18 UTCEG score recompute
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  44. 2026-08-03 22:06 UTCEG score recompute
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  54. 2026-07-25 14:17 UTCEPSS rescore
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  63. 2026-07-20 21:02 UTCOSV refresh
  64. 2026-07-20 17:08 UTCEPSS rescore
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  73. 2026-07-15 16:57 UTCEPSS rescore
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  75. 2026-07-15 02:00 UTCEPSS rescore

Publicly available exploits

(1 reference)

Public exploit code is referenced for this CVE (1 GitHub PoC). Defenders should treat patch urgency accordingly.

  • GitHub PoCcybertechajju/CVE-2026-23869-Exploit
    Published Apr 11, 2026
    Open source ↗

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-23869?
CVE-2026-23869 is a high vulnerability published on April 8, 2026. A denial of service vulnerability exists in React Server Components, affecting the following packages: react-server-dom-parcel, react-server-dom-turbopack and react-server-dom-webpack (versions 19.0.0 through 19.0.4, 19.1.0 through 19.1.5, and 19.2.0 through 19.2.4). The vulnerability is triggered…
When was CVE-2026-23869 disclosed?
CVE-2026-23869 was first published on April 8, 2026, with the most recent update on July 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-23869 actively exploited?
CVE-2026-23869 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.6% probability of exploitation in the next 30 days (74th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-23869?
CVE-2026-23869 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-23869?
A fix for CVE-2026-23869 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

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