Vulnerability details
CVE-2026-23869
Meta react-server-dom-parcelMeta react-server-dom-turbopackMeta react-server-dom-webpack
CVSS 3.1
7.5High
Official description
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 scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.5High | 3.1 | CVEProject cvelistV5 (CNA) (Meta) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 7.5High | 3.1 | CVEProject cvelistV5 (CNA) (redhat-SADP) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Meta | react-server-dom-parcel | 19.0.0 ≤ v ≤ 19.0.4 | CVEProject cvelistV5 (CNA) |
| Meta | react-server-dom-parcel | 19.1.0 ≤ v ≤ 19.1.5 | CVEProject cvelistV5 (CNA) |
| Meta | react-server-dom-parcel | 19.2.0 ≤ v ≤ 19.2.4 | CVEProject cvelistV5 (CNA) |
| Meta | react-server-dom-turbopack | 19.0.0 ≤ v ≤ 19.0.4 | CVEProject cvelistV5 (CNA) |
| Meta | react-server-dom-turbopack | 19.1.0 ≤ v ≤ 19.1.5 | CVEProject cvelistV5 (CNA) |
| Meta | react-server-dom-turbopack | 19.2.0 ≤ v ≤ 19.2.4 | CVEProject cvelistV5 (CNA) |
| Meta | react-server-dom-webpack | 19.0.0 ≤ v ≤ 19.0.4 | CVEProject cvelistV5 (CNA) |
| Meta | react-server-dom-webpack | 19.1.0 ≤ v ≤ 19.1.5 | CVEProject cvelistV5 (CNA) |
| Meta | react-server-dom-webpack | 19.2.0 ≤ v ≤ 19.2.4 | CVEProject cvelistV5 (CNA) |
References and advisories
4- https://github.com/facebook/react/security/advisories/GHSA-479c-33wc-g2pg 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/vex/2026/cve-2026-23869.json x_sadp-csaf-vex
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Details
- Published
- 2026-04-08
- Last updated
- 2026-07-15
- State
- Published
- Assigner (CNA)
- Meta
Exploit prediction (EPSS)
1.57%
Probability of exploitation in 30 days
75.5%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-502Deserialization of Untrusted Data
- CWE-400Uncontrolled Resource Consumption
- CWE-770Allocation of Resources Without Limits or Throttling