CVE-2026-23869

HIGHPre-NVD 7.57.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-04-10. A secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this weekElevated

Also known asEUVD-2026-20584 (ENISA EUVD) · GHSA-479c-33wc-g2pg (GitHub Security Advisories)Source: ENISA EUVD

7.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • Public exploit or proof-of-concept code is available
CISA-KEV: Not listedEPSS PROB: 1.6%CVSS: 7.5Exploit: Public PoCExposed 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
65
EG Risk 65/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity75% × 45%
Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
1.6%
EPSS %ILE
75th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.

EG Severity
7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
1.6% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

April 8, 2026

Last Modified

July 25, 2026

Advisory Details (1)

Auto-updated Jun 15, 2026
Patch available. Sources: github.
GitHub advisoryMentions 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

Patch Availability(3)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
npmreact-server-dom-parcel @ 19.0.5 (fixes >= 19.0.0, < 19.0.5)—ghsa
npmreact-server-dom-parcel @ 19.1.6 (fixes >= 19.1.0, < 19.1.6)—ghsa
npmreact-server-dom-parcel @ 19.2.5 (fixes >= 19.2.0, < 19.2.5)—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

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 10× in last 7d / 42× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 99 of 232 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 133 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 16:44 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  2. 2026-11-01 16:34 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  3. 2026-11-01 07:57 UTCGHSA enrichmentGHSA-479c-33wc-g2pg · GitHub severity HIGH · GitHub CVSS 7.5
  4. 2026-11-01 07:57 UTCEG score recompute
  5. 2026-11-01 01:27 UTCEG score recompute
  6. 2026-10-31 16:32 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  7. 2026-10-30 16:34 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  8. 2026-10-29 16:32 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  9. 2026-10-28 16:31 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  10. 2026-10-27 16:31 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  11. 2026-10-26 16:31 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  12. 2026-10-25 16:32 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  13. 2026-10-25 14:41 UTCEG score recompute
  14. 2026-10-24 21:15 UTCEG score recompute
  15. 2026-10-24 16:32 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  16. 2026-10-23 16:31 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  17. 2026-10-22 16:34 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  18. 2026-10-21 16:32 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  19. 2026-10-20 16:32 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  20. 2026-10-19 16:31 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  21. 2026-10-18 16:31 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  22. 2026-10-18 03:54 UTCEG score recompute
  23. 2026-10-17 17:03 UTCEG score recompute
  24. 2026-10-17 16:33 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  25. 2026-10-16 16:41 UTCEPSS rescoreEPSS 1.6% · 74th percentile
Show 74 more
  1. 2026-10-15 16:31 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  2. 2026-10-14 16:32 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  3. 2026-10-13 16:33 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  4. 2026-10-12 16:33 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  5. 2026-10-12 16:20 UTCEG score recompute
  6. 2026-10-11 20:02 UTCEG score recompute
  7. 2026-10-11 17:15 UTCEG score recompute
  8. 2026-10-11 14:47 UTCEG score recompute
  9. 2026-10-11 13:48 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  10. 2026-10-10 21:47 UTCOSV refresh
  11. 2026-10-10 20:00 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  12. 2026-10-09 20:07 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  13. 2026-10-08 17:11 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  14. 2026-10-07 23:47 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  15. 2026-10-06 15:17 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  16. 2026-10-05 17:42 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  17. 2026-10-04 23:21 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  18. 2026-10-01 19:49 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  19. 2026-09-30 15:03 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  20. 2026-09-29 15:21 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  21. 2026-09-28 13:51 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  22. 2026-09-27 13:47 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  23. 2026-09-26 15:58 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  24. 2026-09-26 00:26 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  25. 2026-09-24 14:03 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  26. 2026-09-21 09:49 UTCOSV refresh
  27. 2026-09-20 20:15 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  28. 2026-09-18 19:27 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  29. 2026-09-16 14:07 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  30. 2026-09-16 05:15 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  31. 2026-09-12 15:01 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  32. 2026-09-11 14:52 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  33. 2026-09-10 09:34 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  34. 2026-09-08 22:00 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  35. 2026-09-07 16:01 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  36. 2026-09-06 13:47 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  37. 2026-09-04 05:06 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  38. 2026-09-02 14:11 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  39. 2026-09-02 07:44 UTCOSV refresh
  40. 2026-09-01 13:53 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  41. 2026-09-01 04:39 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  42. 2026-08-30 19:17 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  43. 2026-08-30 01:22 UTCEPSS rescoreEPSS 1.6% · 72nd percentile
  44. 2026-08-28 21:41 UTCEPSS rescoreEPSS 1.6% · 72nd percentile
  45. 2026-08-27 14:25 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  46. 2026-08-26 14:46 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  47. 2026-08-25 13:48 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  48. 2026-08-23 00:19 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  49. 2026-08-21 23:49 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  50. 2026-08-20 22:55 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  51. 2026-08-19 17:03 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  52. 2026-08-18 13:48 UTCEPSS rescoreEPSS 1.6% · 72nd percentile
  53. 2026-08-17 13:47 UTCEPSS rescoreEPSS 1.6% · 72nd percentile
  54. 2026-08-16 14:56 UTCEPSS rescoreEPSS 1.6% · 72nd percentile
  55. 2026-08-16 07:18 UTCEG score recompute
  56. 2026-08-16 02:14 UTCEPSS rescoreEPSS 1.6% · 72nd percentile
  57. 2026-08-15 01:30 UTCEPSS rescoreEPSS 1.6% · 72nd percentile
  58. 2026-08-14 05:14 UTCEG score recompute
  59. 2026-08-13 22:00 UTCEPSS rescoreEPSS 1.6% · 72nd percentile
  60. 2026-08-12 19:29 UTCEG score recompute
  61. 2026-08-12 13:50 UTCEPSS rescoreEPSS 1.6% · 72nd percentile
  62. 2026-08-11 19:45 UTCEG score recompute
  63. 2026-08-11 13:42 UTCEPSS rescoreEPSS 1.6% · 72nd percentile
  64. 2026-08-11 03:06 UTCEG score recompute
  65. 2026-08-11 00:00 UTCEPSS rescoreEPSS 1.6% · 72nd percentile
  66. 2026-08-09 16:55 UTCEG score recompute
  67. 2026-08-09 13:46 UTCEPSS rescoreEPSS 1.6% · 72nd percentile
  68. 2026-08-09 04:42 UTCEG score recompute
  69. 2026-08-08 16:37 UTCEPSS rescoreEPSS 1.6% · 72nd percentile
  70. 2026-08-08 02:50 UTCEG score recompute
  71. 2026-08-07 14:37 UTCEG score recompute
  72. 2026-08-06 13:46 UTCEPSS rescoreEPSS 1.6% · 72nd percentile
  73. 2026-08-05 23:50 UTCEG score recompute
  74. 2026-08-05 19:17 UTCEPSS rescoreEPSS 1.6% · 72nd percentile

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 ↗

Frequently asked(5)

What is CVE-2026-23869?
CVE-2026-23869 is a high-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-23869 published?
The CVE record for CVE-2026-23869 was published on April 8, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of July 25, 2026; the record at its source may have been updated since.
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 (75th 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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