CVE-2026-101901

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

HIGH
8.2
CVSS Score
Published: September 28, 2026 at 05:16 PM UTC
Updated: October 1, 2026 at 03:17 PM UTC
1 product affected across 1 vendorAxios

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Severity
HIGH8.2
Exploit prediction
EPSS 0.5%
SSVC
PoC

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.20.0
Affected range stops below 1.20.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.2HIGHGitHub_M
Vector?

Quick Info

StatusUNDERGOING ANALYSIS
CWE
CWE-400

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