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Axios: Denial of Service via Unhandled 'error' Event in HTTP/2 ClientHttp2Session Initialization

Priority HIGH 75CWE-400Published · Updated

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

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00536 45th percentileScored 2026-11-07
Fix Fixed axios (axios): 1.20.0axios (npm): 1.20.0Red Hat: 3 advisories

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

VendorProductAffected versionsFixed inStatusSource
axiosaxios1.13.0 to before 1.20.01.20.0Patch availableCNA
—axios (npm)1.13.0 to before 1.20.01.20.0Patch availableGHSA-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

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:axios:axios:*:*:*:*:*:*:*:*——axios
  • cpe:2.3:a:axios:axios:*:*:*:*:*:*:*:* Versions — — ·axios

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 Important
    Red 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 Important
    Red 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 Important
    Red 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 →

ProductStatusPlan or fix
Red Hat Hardened ImagesFixed RHSA-2026:74869, RHSA-2026:74871, RHSA-2026:74872
Not affected: 1 product
  • Red Hat Hardened Images

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-101901
  2. 2026-10-03 Alias added: GHSA-542g-h47m-68v8

References

  • 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
See all 55 →

Sources