CVE-2026-101898
Received Received - Intake

HTTP/2 Proxy Bypass in Axios

Publication date: 2026-09-28

Last updated on: 2026-09-28

Assigner: GitHub, Inc.

Description
Axios is a promise-based HTTP client for the browser and Node.js. From 1.13.0 until 1.20.0, Axios HTTP/2 request setup does not consistently apply proxy settings and caller-supplied DNS lookup policy. An HTTPS request uses httpVersion: 2 with explicit config.proxy or environment-derived proxy settings, or relies on caller-supplied config.lookup DNS policy. The HTTP/2 path can connect without the configured proxy behavior or without applying the caller-supplied config.lookup policy before http2.connect(). Requests can bypass the intended proxy route or the caller-supplied DNS resolution policy. This issue is fixed in version 1.20.0.

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Meta Information

Published
2026-09-28
Last Modified
2026-09-28
Generated
2026-09-28
AI Q&A
2026-09-28
EPSS Evaluated
N/A
NVD
CVE-2026-101898
EUVD
EUVD-2026-88367

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
axios axios From 1.13.0 (inc) to 1.20.0 (inc)
axios axios 1.20.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-918 The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

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Executive Summary

This vulnerability in Axios (CVE-2026-101898) affects HTTP/2 requests between versions 1.13.0 and 1.20.0. When using httpVersion: 2, Axios fails to consistently apply proxy settings or caller-supplied DNS lookup policies. This allows requests to bypass intended proxy routes or DNS resolution rules, potentially connecting directly to unauthorized destinations.

Detection Guidance

To detect this vulnerability, check if your Axios version is between 1.13.0 and 1.20.0. Run: npm list axios or node -e "console.log(require('axios/package.json').version)". If the version is in this range, the system is vulnerable.

Impact Analysis

If you use Axios with HTTP/2 in server-side deployments, an attacker could exploit this to bypass network security controls like proxies or DNS policies. This may enable unauthorized access to internal services, exposing sensitive data or allowing modification of internal systems. Workarounds include using HTTP/1 or enforcing external destination policies.

Compliance Impact

This vulnerability could lead to unauthorized data exposure or system access, violating confidentiality requirements in GDPR and HIPAA. Bypassing proxy controls may also breach network security policies required for compliance. Organizations using affected Axios versions should update to 1.20.0 or later to mitigate risks.

Mitigation Strategies

Upgrade Axios to version 1.20.0 or later. Use npm update axios or specify the latest version in package.json. Alternatively, avoid using httpVersion: 2 in requests or enforce proxy/DNS policies outside Axios.

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