CVE-2026-101901: Axios: Denial of Service via Unhandled 'error' Event in HTTP/2 ClientHttp2Session Initialization

September 30, 2026

Axios versions with Node.js HTTP/2 support can terminate the caller’s process when a ClientHttp2Session emits an error event that is not handled by axios.

This affects applications that use the Node HTTP adapter with httpVersion: 2. A malicious, unavailable, or non-HTTP/2 endpoint can cause an uncaught exception instead of a normal rejected axios request.

References

github.com/advisories/GHSA-542g-h47m-68v8
github.com/axios/axios/commit/d19040bda7a8be2f82c3c6e1a5bc03917daee39a
github.com/axios/axios/pull/11141
github.com/axios/axios/releases/tag/v1.20.0
github.com/axios/axios/security/advisories/GHSA-542g-h47m-68v8
nvd.nist.gov/vuln/detail/CVE-2026-101901

Code Behaviors & Features

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