Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, he fix for no_proxy hostname normalization bypass is incomplete. When no_proxy=localhost is set, requests to 127.0.0.1 and [::1] still route through the proxy instead of bypassing it. The shouldBypassProxy() function does pure string matching — it does not resolve IP aliases or loopback equivalents. This vulnerability is fixed in 1.15.1 and 0.31.1.
History

Wed, 29 Apr 2026 12:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-1220
References
Metrics threat_severity

None

threat_severity

Moderate


Mon, 27 Apr 2026 20:00:00 +0000

Type Values Removed Values Added
First Time appeared Axios
Axios axios
CPEs cpe:2.3:a:axios:axios:*:*:*:*:*:node.js:*:*
Vendors & Products Axios
Axios axios

Mon, 27 Apr 2026 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 24 Apr 2026 18:15:00 +0000

Type Values Removed Values Added
Description Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, he fix for no_proxy hostname normalization bypass is incomplete. When no_proxy=localhost is set, requests to 127.0.0.1 and [::1] still route through the proxy instead of bypassing it. The shouldBypassProxy() function does pure string matching — it does not resolve IP aliases or loopback equivalents. This vulnerability is fixed in 1.15.1 and 0.31.1.
Title Axios: no_proxy bypass via IP alias allows SSRF
Weaknesses CWE-918
References
Metrics cvssV3_1

{'score': 6.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-04-24T17:57:26.975Z

Updated: 2026-04-27T13:46:32.484Z

Reserved: 2026-04-23T16:05:01.708Z

Link: CVE-2026-42038

cve-icon Vulnrichment

Updated: 2026-04-27T13:46:24.142Z

cve-icon NVD

Status : Analyzed

Published: 2026-04-24T18:16:30.680

Modified: 2026-04-27T19:52:16.520

Link: CVE-2026-42038

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-04-24T17:57:26Z

Links: CVE-2026-42038 - Bugzilla