Axios: Denial of Service via Unhandled 'error' Event in HTTP/2 ClientHttp2Session Initialization
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-400.
Summary
Axios is a promise-based HTTP client for the browser and Node.js. From 1.13.0 until 1.20.0, Http2Sessions does not install adequate error handling for a ClientHttp2Session during Axios HTTP/2 session initialization or reuse. A request uses httpVersion: 2 and the ClientHttp2Session emits an error during session initialization or reuse. The unhandled session error escapes normal Promise rejection handling. The uncaught error can terminate the Node.js process and cause denial of service. This issue is fixed in version 1.20.0.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- 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 |
|---|---|---|---|---|---|
| axios | axios | 1.13.0 to before 1.20.0 | 1.20.0 | Patch available | CNA |
| — | axios (npm) | 1.13.0 to before 1.20.0 | 1.20.0 | Patch available | GHSA-542g-h47m-68v8 |
- axios Vendoraxios Affected 1.13.0 to before 1.20.0 Fixed in 1.20.0 Patch available CNA
- axios (npm) Vendor— Affected 1.13.0 to before 1.20.0 Fixed in 1.20.0 Patch available GHSA-542g-h47m-68v8
Remediation
- Fix · CNA axios (axios) Fixed in 1.20.0
- Fix · GHSA-542g-h47m-68v8 axios (npm) Fixed in 1.20.0 Advisory →
Red Hat 3 advisories
- RHSA-2026:74872 Released 2026-10-02 · Red Hat rating ImportantRed Hat Hardened Images RPMs Security Update
- Red Hat Hardened Images grafana13.2-13.2.1-0.9.hum1@aarch64, grafana13.2-13.2.1-0.9.hum1@src, grafana13.2-13.2.1-0.9.hum1@x86_64
- RHSA-2026:74871 Released 2026-10-02 · Red Hat rating ImportantRed Hat Hardened Images RPMs Security Update
- Red Hat Hardened Images grafana12.4-12.4.12-0.3.hum1@aarch64, grafana12.4-12.4.12-0.3.hum1@src, grafana12.4-12.4.12-0.3.hum1@x86_64
- RHSA-2026:74869 Released 2026-10-02 · Red Hat rating ImportantRed Hat Hardened Images RPMs Security Update
- Red Hat Hardened Images grafana13.1-13.1.6-0.6.hum1@aarch64, grafana13.1-13.1.6-0.6.hum1@src, grafana13.1-13.1.6-0.6.hum1@x86_64
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Hardened Images | Fixed | RHSA-2026:74869, RHSA-2026:74871, RHSA-2026:74872 |
Not affected: 1 product
- Red Hat Hardened Images
Timeline
- 2026-10-02 Threatist record created from CVE-2026-101901
- 2026-10-03 Alias added: GHSA-542g-h47m-68v8
References
More axios vulnerabilities
- TI-2026-30422 Server-side request forgery in axios CVSS 3.1CRITICAL 10.0
- TI-2026-65210 Axios: Prototype Pollution Gadget in axios toFormData Options CVSS 4.0HIGH 8.3
- TI-2026-32427 Server-side request forgery in axios CVSS 3.1HIGH 8.6
- TI-2026-65207 Axios: ReDoS (O(N²)) in shouldBypassProxy host normalization, reachable via untrusted redirect Location CVSS 4.0HIGH 8.2
- TI-2026-65206 Axios: Node HTTP adapter prototype-pollution gadget allows request socket hijack via inherited createConnection CVSS 4.0HIGH 7.6
- TI-2026-30578 Axios: Prototype pollution read-side gadgets in HTTP adapter allow credential injection and request hijacking CVSS 3.1CRITICAL 9.1
Sources
- CVE-2026-101901 · CVE Program
- CVE-2026-101901 · NVD
- FIRST EPSS
- GHSA-542g-h47m-68v8 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-101901 · 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