Backpressure request ignored in fetch() in Undici
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-400.
Summary
Undici is an HTTP/1.1 client, written from scratch for Node.js. In affected versions calling `fetch(url)` and not consuming the incoming body ((or consuming it very slowing) will lead to a memory leak. This issue has been addressed in version 6.6.1. Users are advised to upgrade. Users unable to upgrade should make sure to always consume the incoming body.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| NodeJS | undici | 6.0.0 to before 6.6.1 | 6.6.1 | Patch available | CNA |
| — | undici (npm) | 6.0.0 to before 6.6.1 | 6.6.1 | Patch available | GHSA-9f24-jqhm-jfcw |
- undici VendorNodeJS Affected 6.0.0 to before 6.6.1 Fixed in 6.6.1 Patch available CNA
- undici (npm) Vendor— Affected 6.0.0 to before 6.6.1 Fixed in 6.6.1 Patch available GHSA-9f24-jqhm-jfcw
Remediation
- Fix · CNA undici (nodejs) Fixed in 6.6.1
- Fix · GHSA-9f24-jqhm-jfcw undici (npm) Fixed in 6.6.1 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 5 products
- Red Hat Developer Hub 1
- Red Hat Enterprise Linux 10
- Red Hat OpenShift Dev Spaces
- Red Hat Openshift Data Foundation 4
- Red Hat build of Apache Camel - HawtIO 4
Timeline
- 2026-10-02 Threatist record created from CVE-2024-24750
- 2026-10-03 Alias added: GHSA-9f24-jqhm-jfcw
- 2026-10-27 Affected versions changed · Red Hat
References
Advisory 3
More NodeJS Undici vulnerabilities
- TI-2026-01215 undici is vulnerable to Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') CVSS 3.1CRITICAL 9.8
- TI-2022-16376 `undici.request` vulnerable to SSRF using absolute URL on `pathname` CVSS 3.1CRITICAL 9.8
- TI-2023-09734 CRLF Injection in Nodejs ‘undici’ via host CVSS 3.1MEDIUM 6.5
- TI-2022-13193 CRLF injection in request headers CVSS 3.1MEDIUM 6.5
- TI-2022-16375 CRLF Injection in Nodejs ‘undici’ via Content-Type CVSS 3.1MEDIUM 5.3
- TI-2022-13194 Uncleared cookies on cross-host/cross-origin redirect in undici CVSS 3.1MEDIUM 6.5
Sources
- CVE-2024-24750 · CVE Program
- CVE-2024-24750 · NVD
- FIRST EPSS
- GHSA-9f24-jqhm-jfcw · GitHub Advisory Database · CC BY 4.0
- CVE-2024-24750 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences