CVE-2026-23864
Multiple denial of service vulnerabilities exist in React Server Components, affecting the following packages: react-server-dom-parcel,…
- Published
- Updated
- Reserved
- Assigned by
- Meta
Description
Multiple denial of service vulnerabilities exist in React Server Components, affecting the following packages: react-server-dom-parcel, react-server-dom-turbopack, react-server-dom-webpack. The vulnerabilities are triggered by sending specially crafted HTTP requests to Server Function endpoints, and could lead to server crashes, out-of-memory exceptions or excessive CPU usage; depending on the vulnerable code path being exercised, the application configuration and application code. Strongly consider upgrading to the latest package versions to reduce risk and prevent availability issues in applications using React Server Components.
Timeline
ID reserved
By Meta
- 10 days later
· 10 days later
Published
- 6 months later
· 6 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| redhat-SADPADP (enrichment) | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 2.6% · top 15% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Weakness
- (CWE-502): Deserialization of Untrusted Data. (CWE-400): Uncontrolled Resource Consumption
- CWE-502 Deserialization of Untrusted Data (opens in a new tab)All about CWE-502 and its CVEs
- CWE-400 Uncontrolled Resource Consumption (opens in a new tab)All about CWE-400 and its CVEs
- CWE-1284: Improper Validation of Specified Quantity in Input (opens in a new tab)All about CWE-1284 and its CVEs
Affected products
Meta · react-server-dom-webpack
- affected 19.0.0 – < 19.0.4
- affected 19.1.0 – < 19.1.5
- affected 19.2.0 – < 19.2.4
Meta · react-server-dom-turbopack
- affected 19.0.0 – < 19.0.4
- affected 19.1.0 – < 19.1.5
- affected 19.2.0 – < 19.2.4
Meta · react-server-dom-parcel
- affected 19.0.0 – < 19.0.4
- affected 19.1.0 – < 19.1.5
- affected 19.2.0 – < 19.2.4
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- npmreact-server-dom-parcelGHSA-83fc-fqcc-2hmg (opens in a new tab)
- npmreact-server-dom-turbopackGHSA-83fc-fqcc-2hmg (opens in a new tab)
- npmreact-server-dom-webpackGHSA-83fc-fqcc-2hmg (opens in a new tab)
References (6)
- https://www.facebook.com/security/advisories/cve-2026-23864 (opens in a new tab)x_refsource_CONFIRM
- https://access.redhat.com/security/cve/CVE-2026-23864 (opens in a new tab)vdb-entryx_refsource_REDHAT
- RHBZ#2433059 (opens in a new tab)issue-trackingx_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23864.json (opens in a new tab)x_sadp-csaf-vex
- https://access.redhat.com/errata/RHSA-2026:34608 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:13571 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-83fc-fqcc-2hmg (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-23864)Record last updated .