Resource allocation without limits in NodeJS undici
Priority LOW 33CWE-770Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 2 fixed, 11 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-770.
Summary
Undici is an HTTP/1.1 client for Node.js. Prior to 7.18.0 and 6.23.0, the number of links in the decompression chain is unbounded and the default maxHeaderSize allows a malicious server to insert thousands compression steps leading to high CPU usage and excessive memory allocation. This vulnerability is fixed in 7.18.0 and 6.23.0.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00457 39th percentileScored 2026-11-07
Fix Partial undici (nodejs): 6.23.0, 7.18.2undici (npm): 7.18.2, 6.23.0Red Hat: 2 advisoriesRed Hat: 2 fixed, 11 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
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 | before 6.23.0; 7.0.0 to before 7.18.2 | 6.23.0, 7.18.2 | Patch available | CNA |
| — | undici (npm) | 7.0.0 to before 7.18.2 | 7.18.2 | Patch available | GHSA-g9mf-h72j-4rw9 |
| — | undici (npm) | before 6.23.0 | 6.23.0 | Patch available | GHSA-g9mf-h72j-4rw9 |
- undici VendorNodeJS Affected before 6.23.0; 7.0.0 to before 7.18.2 Fixed in 6.23.0, 7.18.2 Patch available CNA
- undici (npm) Vendor— Affected 7.0.0 to before 7.18.2 Fixed in 7.18.2 Patch available GHSA-g9mf-h72j-4rw9
- undici (npm) Vendor— Affected before 6.23.0 Fixed in 6.23.0 Patch available GHSA-g9mf-h72j-4rw9
Remediation
- Fix · CNA undici (nodejs) Fixed in 6.23.0, 7.18.2
- Fix · GHSA-g9mf-h72j-4rw9 undici (npm) Fixed in 7.18.2 Advisory →
- Fix · GHSA-g9mf-h72j-4rw9 undici (npm) Fixed in 6.23.0 Advisory →
Red Hat 2 advisories
- RHSA-2026:56431 Released 2026-08-18 · Red Hat rating ImportantRed Hat OpenShift Data Foundation 4.18.27 security, enhancement & bug fix update
- Red Hat Openshift Data Foundation 4.18 registry.redhat.io/odf4/cephcsi-rhel9, registry.redhat.io/odf4/cephcsi-rhel9-operator, registry.redhat.io/odf4/mcg-core-rhel9 +16
- RHSA-2026:24841 Released 2026-06-09 · Red Hat rating ModerateRed Hat Developer Hub 1.10.0 release.
- Red Hat Developer Hub 1.10 registry.redhat.io/rhdh/rhdh-hub-rhel9
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Cryostat 4 | Affected | No fix yet: Fix deferred |
| OpenShift Pipelines | Affected | No fix yet: Fix deferred |
| Red Hat Advanced Cluster Management for Kubernetes 2 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat JBoss Enterprise Application Platform 8 | Affected | No fix yet: Fix deferred |
| Red Hat JBoss Enterprise Application Platform Expansion Pack | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift AI (RHOAI) | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Dev Spaces | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift GitOps | Affected | No fix yet: Fix deferred |
| Red Hat Developer Hub 1.10 | Fixed | RHSA-2026:24841 |
| Red Hat Openshift Data Foundation 4.18 | Fixed | RHSA-2026:56431 |
Not affected: 2 products
- Red Hat Developer Hub 1.10
- Red Hat Openshift Data Foundation 4.18
Timeline
- 2026-10-02 Threatist record created from CVE-2026-22036
- 2026-10-03 Alias added: GHSA-g9mf-h72j-4rw9
References
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-2026-22036 · CVE Program
- CVE-2026-22036 · NVD
- FIRST EPSS
- GHSA-g9mf-h72j-4rw9 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-22036 · 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