Vulnerability-Lookup

CVE-2026-23869 (GCVE-0-2026-23869)

Vulnerability from cvelistv5 – Published: 2026-04-08 19:11 – Updated: 2026-06-30 12:06

Summary

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.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

(CWE-502) Deserialization of Untrusted Data, (CWE-400) Uncontrolled Resource Consumption
CWE-502 - Deserialization of Untrusted Data
CWE-400 - Uncontrolled Resource Consumption
CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

Meta

References

4 references

URL	Tags
https://github.com/facebook/react/security/adviso…	x_refsource_CONFIRM
https://access.redhat.com/security/cve/CVE-2026-23869	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2456663	issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v…	x_sadp-csaf-vex

Impacted products

4 products

Vendor	Product	Version
Meta	react-server-dom-turbopack	Affected: 19.0.0 , ≤ 19.0.4 (semver) Affected: 19.1.0 , ≤ 19.1.5 (semver) Affected: 19.2.0 , ≤ 19.2.4 (semver)
Meta	react-server-dom-parcel	Affected: 19.0.0 , ≤ 19.0.4 (semver) Affected: 19.1.0 , ≤ 19.1.5 (semver) Affected: 19.2.0 , ≤ 19.2.4 (semver)
Meta	react-server-dom-webpack	Affected: 19.0.0 , ≤ 19.0.4 (semver) Affected: 19.1.0 , ≤ 19.1.5 (semver) Affected: 19.2.0 , ≤ 19.2.4 (semver)
Red Hat	Red Hat OpenShift AI (RHOAI)	cpe:/a:redhat:openshift_ai

Show details on NVD website

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      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

FKIE_CVE-2026-23869

Vulnerability from fkie_nvd - Published: 2026-04-08 20:16 - Updated: 2026-06-30 03:17

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

References

	URL	Tags
	cve-assign@fb.com	https://github.com/facebook/react/security/advisories/GHSA-479c-33wc-g2pg
	0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/security/cve/CVE-2026-23869
	0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://bugzilla.redhat.com/show_bug.cgi?id=2456663
	0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23869.json

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "react-server-dom-turbopack",
          "vendor": "Meta",
          "versions": [
            {
              "lessThanOrEqual": "19.0.4",
              "status": "affected",
              "version": "19.0.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "19.1.5",
              "status": "affected",
              "version": "19.1.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "19.2.4",
              "status": "affected",
              "version": "19.2.0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "react-server-dom-parcel",
          "vendor": "Meta",
          "versions": [
            {
              "lessThanOrEqual": "19.0.4",
              "status": "affected",
              "version": "19.0.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "19.1.5",
              "status": "affected",
              "version": "19.1.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "19.2.4",
              "status": "affected",
              "version": "19.2.0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "react-server-dom-webpack",
          "vendor": "Meta",
          "versions": [
            {
              "lessThanOrEqual": "19.0.4",
              "status": "affected",
              "version": "19.0.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "19.1.5",
              "status": "affected",
              "version": "19.1.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "19.2.4",
              "status": "affected",
              "version": "19.2.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "cve-assign@fb.com"
    },
    {
      "affectedData": [
        {
          "cpes": [
            "cpe:/a:redhat:openshift_ai"
          ],
          "defaultStatus": "unaffected",
          "product": "Red Hat OpenShift AI (RHOAI)",
          "vendor": "Red Hat"
        }
      ],
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    }
  ],
  "id": "CVE-2026-23869",
  "lastModified": "2026-06-30T03:17:34.453",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "cve-assign@fb.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-23869",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-04-08T19:55:33.314236Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-04-08T20:16:23.003",
  "references": [
    {
      "source": "cve-assign@fb.com",
      "url": "https://github.com/facebook/react/security/advisories/GHSA-479c-33wc-g2pg"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/security/cve/CVE-2026-23869"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2456663"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23869.json"
    }
  ],
  "sourceIdentifier": "cve-assign@fb.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        },
        {
          "lang": "en",
          "value": "CWE-502"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-770"
        }
      ],
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "type": "Secondary"
    }
  ]
}

GHSA-479C-33WC-G2PG

Vulnerability from github – Published: 2026-04-10 15:35 – Updated: 2026-04-10 15:35

Summary

React Server Components have a Denial of Service Vulnerability

Details

Impact

A denial of service vulnerability exists in React Server Components, affecting the following packages: react-server-dom-parcel, react-server-dom-turbopack, react-server-dom-webpack versions 19.0.0, 19.1.0 and 19.2.0. 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.

We recommend updating immediately.

The vulnerability exists in versions 19.0.0 through 19.0.4, 19.1.0 through 19.1.5, and 19.2.0 through 19.2.4 of:

react-server-dom-webpack react-server-dom-parcel react-server-dom-turbopack

Patches

Fixes were back ported to versions 19.0.5, 19.1.6, and 19.2.5.

If you are using any of the above packages please upgrade to any of the fixed versions immediately.

If your app’s React code does not use a server, your app is not affected by this vulnerability. If your app does not use a framework, bundler, or bundler plugin that supports React Server Components, your app is not affected by this vulnerability.

References

See the blog post for more information and upgrade instructions.

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "react-server-dom-parcel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "19.0.0"
            },
            {
              "fixed": "19.0.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "react-server-dom-parcel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "19.1.0"
            },
            {
              "fixed": "19.1.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "react-server-dom-parcel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "19.2.0"
            },
            {
              "fixed": "19.2.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "react-server-dom-turbopack"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "19.0.0"
            },
            {
              "fixed": "19.0.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "react-server-dom-turbopack"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "19.1.0"
            },
            {
              "fixed": "19.1.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "react-server-dom-turbopack"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "19.2.0"
            },
            {
              "fixed": "19.2.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "react-server-dom-webpack"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "19.0.0"
            },
            {
              "fixed": "19.0.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "react-server-dom-webpack"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "19.1.0"
            },
            {
              "fixed": "19.1.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "react-server-dom-webpack"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "19.2.0"
            },
            {
              "fixed": "19.2.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-23869"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400",
      "CWE-502"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-10T15:35:37Z",
    "nvd_published_at": "2026-04-08T20:16:23Z",
    "severity": "HIGH"
  },
  "details": "## Impact\n\nA denial of service vulnerability exists in React Server Components, affecting the following packages: react-server-dom-parcel, react-server-dom-turbopack, react-server-dom-webpack versions 19.0.0, 19.1.0 and 19.2.0. The vulnerability is triggered by sending specially crafted HTTP requests to Server Function endpoints.\n\nThe payload of the HTTP request causes excessive CPU usage for up to a minute ending in a thrown error that is catchable.\n\nWe recommend updating immediately.\n\nThe vulnerability exists in versions 19.0.0 through 19.0.4, 19.1.0 through 19.1.5, and 19.2.0 through 19.2.4 of:\n\n[react-server-dom-webpack](https://www.npmjs.com/package/react-server-dom-webpack)\n[react-server-dom-parcel](https://www.npmjs.com/package/react-server-dom-parcel)\n[react-server-dom-turbopack](https://www.npmjs.com/package/react-server-dom-turbopack?activeTab=readme)\n\n## Patches\n\nFixes were back ported to versions 19.0.5, 19.1.6, and 19.2.5.\n\nIf you are using any of the above packages please upgrade to any of the fixed versions immediately.\n\nIf your app\u2019s React code does not use a server, your app is not affected by this vulnerability. If your app does not use a framework, bundler, or bundler plugin that supports React Server Components, your app is not affected by this vulnerability.\n\n## References\n\nSee the [blog post](https://react.dev/blog/2025/12/11/denial-of-service-and-source-code-exposure-in-react-server-components) for more information and upgrade instructions.",
  "id": "GHSA-479c-33wc-g2pg",
  "modified": "2026-04-10T15:35:38Z",
  "published": "2026-04-10T15:35:37Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/facebook/react/security/advisories/GHSA-479c-33wc-g2pg"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23869"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/facebook/react"
    },
    {
      "type": "WEB",
      "url": "https://react.dev/blog/2025/12/11/denial-of-service-and-source-code-exposure-in-react-server-components"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "React Server Components have a Denial of Service Vulnerability"
}

WID-SEC-W-2026-1011

Vulnerability from csaf_certbund - Published: 2026-04-08 22:00 - Updated: 2026-04-08 22:00

Summary

Vercel Next.js: Schwachstelle ermöglicht Denial of Service

Severity

Mittel

Notes

Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.

Produktbeschreibung: Next.js ist ein Framework für React-basierte Web-Anwendungen.

Angriff: Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Vercel Next.js ausnutzen, um einen Denial of Service Angriff durchzuführen.

Betroffene Betriebssysteme: - Linux - Sonstiges - UNIX - Windows

CVE-2026-23869

Affected products

Known affected 2 products

Product	Identifier	Version	Remediation
Vercel Next.js <16.2.3 Vercel / Next.js		<16.2.3
Vercel Next.js <15.5.15 Vercel / Next.js		<15.5.15

References

3 references

URL	Category
https://wid.cert-bund.de/.well-known/csaf/white/2…	self
https://wid.cert-bund.de/portal/wid/securityadvis…	self
https://github.com/vercel/next.js/security/adviso…	external

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
      "text": "mittel"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "Next.js ist ein Framework f\u00fcr React-basierte Web-Anwendungen.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Vercel Next.js ausnutzen, um einen Denial of Service Angriff durchzuf\u00fchren.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux\n- Sonstiges\n- UNIX\n- Windows",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2026-1011 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1011.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-1011 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1011"
      },
      {
        "category": "external",
        "summary": "GitHub Security Advisory GHSA-q4gf-8mx6-v5v3 vom 2026-04-08",
        "url": "https://github.com/vercel/next.js/security/advisories/GHSA-q4gf-8mx6-v5v3"
      }
    ],
    "source_lang": "en-US",
    "title": "Vercel Next.js: Schwachstelle erm\u00f6glicht Denial of Service",
    "tracking": {
      "current_release_date": "2026-04-08T22:00:00.000+00:00",
      "generator": {
        "date": "2026-04-09T09:34:11.678+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.5.0"
        }
      },
      "id": "WID-SEC-W-2026-1011",
      "initial_release_date": "2026-04-08T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-04-08T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c15.5.15",
                "product": {
                  "name": "Vercel Next.js \u003c15.5.15",
                  "product_id": "T052532"
                }
              },
              {
                "category": "product_version",
                "name": "15.5.15",
                "product": {
                  "name": "Vercel Next.js 15.5.15",
                  "product_id": "T052532-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:vercel:next.js:15.5.15"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c16.2.3",
                "product": {
                  "name": "Vercel Next.js \u003c16.2.3",
                  "product_id": "T052533"
                }
              },
              {
                "category": "product_version",
                "name": "16.2.3",
                "product": {
                  "name": "Vercel Next.js 16.2.3",
                  "product_id": "T052533-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:vercel:next.js:16.2.3"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Next.js"
          }
        ],
        "category": "vendor",
        "name": "Vercel"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-23869",
      "product_status": {
        "known_affected": [
          "T052533",
          "T052532"
        ]
      },
      "release_date": "2026-04-08T22:00:00.000+00:00",
      "title": "CVE-2026-23869"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-23869 (GCVE-0-2026-23869)

FKIE_CVE-2026-23869

GHSA-479C-33WC-G2PG

Impact

Patches

References

WID-SEC-W-2026-1011

Tags

Sightings

Nomenclature