CVE-2026-23870

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 1.5%, 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, nvd
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: 1.5%CVSS: 7.5Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

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).

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
65
EG Risk 65/100

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%
Exploitation40% × 40%
Automatability100% × 15%
EPSS PROB
1.5%
EPSS %ILE
74th
KEV
Not listed

Published

May 6, 2026

Last Modified

August 12, 2026

Advisory Details (1)

Auto-updated May 6, 2026
Patch available. Sources: github.
githubMentions a patch (unverified)

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

https://github.com/facebook/react/security/advisories/GHSA-rv78-f8rc-xrxh

Affected Packages

(3 across 1 ecosystem)
npm(3)
PackageVulnerable rangeFix by version rangeDependents
react-server-dom-parcel—
  • 19.0.0 up to 19.0.6: fixed in 19.0.6
  • 19.1.0 up to 19.1.7: fixed in 19.1.7
  • 19.2.0 up to 19.2.6: fixed in 19.2.6
—
react-server-dom-turbopack—
  • 19.0.0 up to 19.0.6: fixed in 19.0.6
  • 19.1.0 up to 19.1.7: fixed in 19.1.7
  • 19.2.0 up to 19.2.6: fixed in 19.2.6
—
react-server-dom-webpack—
  • 19.0.0 up to 19.0.6: fixed in 19.0.6
  • 19.1.0 up to 19.1.7: fixed in 19.1.7
  • 19.2.0 up to 19.2.6: fixed in 19.2.6
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 22× 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 200 total refreshes for this CVE.

  1. 2026-10-10 20:00 UTCEPSS rescore
  2. 2026-10-09 20:07 UTCEPSS rescore
  3. 2026-10-08 17:11 UTCEPSS rescore
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  9. 2026-09-30 09:11 UTCOSV refresh
  10. 2026-09-29 15:21 UTCEPSS rescore
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  21. 2026-09-11 15:40 UTCOSV refresh
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  1. 2026-09-06 13:47 UTCEPSS rescore
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  13. 2026-08-23 19:47 UTCEG score recompute
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  20. 2026-08-17 12:53 UTCEG score recompute
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  26. 2026-08-13 22:00 UTCEPSS rescore
  27. 2026-08-12 15:55 UTCEG score recompute
  28. 2026-08-12 13:50 UTCEPSS rescore
  29. 2026-08-11 15:59 UTCEG score recompute
  30. 2026-08-11 13:42 UTCEPSS rescore
  31. 2026-08-11 01:30 UTCEG score recompute
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  39. 2026-08-06 13:46 UTCEPSS rescore
  40. 2026-08-05 22:19 UTCEG score recompute
  41. 2026-08-05 19:17 UTCEPSS rescore
  42. 2026-08-04 15:10 UTCEPSS rescore
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  44. 2026-08-03 19:51 UTCEG score recompute
  45. 2026-08-03 10:35 UTCEPSS rescore
  46. 2026-08-02 05:02 UTCEG score recompute
  47. 2026-08-02 02:26 UTCEPSS rescore
  48. 2026-08-01 04:15 UTCEPSS rescore
  49. 2026-07-30 01:30 UTCEPSS rescore
  50. 2026-07-27 14:13 UTCEPSS rescore
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  53. 2026-07-25 14:17 UTCEPSS rescore
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  57. 2026-07-23 14:18 UTCEPSS rescore
  58. 2026-07-23 03:07 UTCEG score recompute
  59. 2026-07-22 14:08 UTCEPSS rescore
  60. 2026-07-21 15:24 UTCEPSS rescore
  61. 2026-07-21 15:24 UTCEPSS rescore
  62. 2026-07-21 00:17 UTCOSV refresh
  63. 2026-07-20 17:08 UTCEPSS rescore
  64. 2026-07-19 14:31 UTCEPSS rescore
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  74. 2026-07-15 02:00 UTCEPSS rescore
  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 PoCdwisiswant0/next-16.2.4-pocs
    Published May 7, 2026

    Next.js v16.2.4 Security PoC Collection (CVE-2026-23870, CVE-2026-44575, CVE-2026-44579, CVE-2026-44574, CVE-2026-44578, CVE-2026-44573, CVE-2026-44581, CVE-2026-44580, CVE-2026-44577, CVE-2026-44576, CVE-2026-44582, CVE-2026-44572)

    Open source ↗

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-23870?
CVE-2026-23870 is a high vulnerability published on May 6, 2026. 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,…
When was CVE-2026-23870 disclosed?
CVE-2026-23870 was first published on May 6, 2026, with the most recent update on August 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-23870 actively exploited?
CVE-2026-23870 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.5% probability of exploitation in the next 30 days (74th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-23870?
CVE-2026-23870 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-23870?
A fix for CVE-2026-23870 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

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