Security Bulletin: Axios NO_PROXY Bypass via Improper Hostname Normalization Leads to SSRF

Summary Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.0 and 0.31.0, Axios does not correctly handle hostname normalization when checking NOPROXY rules. Requests to loopback addresses like localhost. with a trailing dot or ::1 IPv6 literal skip NOPROXY matching an...

CVE-2026-39805

Inconsistent Interpretation of HTTP Requests vulnerability in mtrudel bandit allows HTTP request smuggling via duplicate Content-Length headers. 'Elixir.Bandit.Headers':getcontentlength/1 in lib/bandit/headers.ex uses List.keyfind/3, which returns only the first matching header. When a request...

EEF-CVE-2026-39805 CL.CL HTTP request smuggling via duplicate Content-Length in bandit

Summary Inconsistent Interpretation of HTTP Requests vulnerability in mtrudel bandit allows HTTP request smuggling via duplicate Content-Length headers. 'Elixir.Bandit.Headers':get\content\length/1 in lib/bandit/headers.ex uses List.keyfind/3, which returns only the first matching header. When a...

Server-Side Request Forgery (SSRF)

Axios is vulnerable to Server-Side Request Forgery SSRF. The vulnerability is due to inadequate hostname normalization and reliance on string matching in proxy bypass logic, which allows an attacker to route local requests through a proxy instead of bypassing it...

CVE-2026-42038

A flaw was found in Axios, a software library used for making web requests. This vulnerability allows an attacker to bypass the noproxy configuration, which is designed to prevent certain internal network requests from being sent through an external proxy. Specifically, when noproxy=localhost is...

Proxy Bypass

Axios is vulnerable to Proxy Bypass. The vulnerability is due to incomplete NOPROXY handling for loopback addresses, where requests to the 127.0.0.0/8 range excluding 127.0.0.1 bypass proxy restrictions, allowing attackers to access internal or local services despite configured protections...

Linux Distros Unpatched Vulnerability : CVE-2026-42043

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, an attacker who can influence the target URL of an Axios request c...

Linux Distros Unpatched Vulnerability : CVE-2026-42038

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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 noproxy hostname normalization bypass is incomplete. Wh...

Incomplete List of Disallowed Inputs

Overview org.webjars.npm:axios is a promise-based HTTP client for the browser and Node.js. Affected versions of this package are vulnerable to Incomplete List of Disallowed Inputs via the isLoopback host check in the proxy helper, which relied on a static list of LOOPBACKADDRESSES. An attacker ca...

Server-side Request Forgery (SSRF)

Overview org.webjars.npm:axios is a promise-based HTTP client for the browser and Node.js. Affected versions of this package are vulnerable to Server-side Request Forgery SSRF through the AxiosHeaders normalization path and shouldBypassProxy helper. An attacker can smuggle CRLF and other control...

Server-side Request Forgery (SSRF)

Overview axios is a promise-based HTTP client for the browser and Node.js. Affected versions of this package are vulnerable to Server-side Request Forgery SSRF through the AxiosHeaders normalization path and shouldBypassProxy helper. An attacker can smuggle CRLF and other control characters into...

CVE-2026-42043

Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, an attacker who can influence the target URL of an Axios request can use any address in the 127.0.0.0/8 range other than 127.0.0.1 to completely bypass the NOPROXY protection. This vulnerability is due t...

CVE-2026-42038

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 noproxy hostname normalization bypass is incomplete. When noproxy=localhost is set, requests to 127.0.0.1 and ::1 still route through the proxy instead of bypassing it. The shouldBypassProxy...

CVE-2026-42038 Axios: no_proxy bypass via IP alias allows SSRF

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 noproxy hostname normalization bypass is incomplete. When noproxy=localhost is set, requests to 127.0.0.1 and ::1 still route through the proxy instead of bypassing it. The shouldBypassProxy...

CVE-2026-42038

Axios no_proxy bypass via IP alias allows SSRF in older releases. Affected: Axios (browser/Node.js). Fault: shouldBypassProxy() uses pure string matching and does not resolve IP aliases or loopback equivalents, so requests to 127.0.0.1 or [::1] can be proxied when no_proxy=localhost. Impact: pote...

CVE-2026-42038 Axios: no_proxy bypass via IP alias allows SSRF

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 noproxy hostname normalization bypass is incomplete. When noproxy=localhost is set, requests to 127.0.0.1 and ::1 still route through the proxy instead of bypassing it. The shouldBypassProxy...

CVE-2026-42043

Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, an attacker who can influence the target URL of an Axios request can use any address in the 127.0.0.0/8 range other than 127.0.0.1 to completely bypass the NOPROXY protection. This vulnerability is due t...

CVE-2026-42043 Axios: Incomplete Fix for CVE-2025-62718 — NO_PROXY Protection Bypassed via RFC 1122 Loopback Subnet (127.0.0.0/8) in Axios 1.15.0

Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, an attacker who can influence the target URL of an Axios request can use any address in the 127.0.0.0/8 range other than 127.0.0.1 to completely bypass the NOPROXY protection. This vulnerability is due t...

CVE-2026-42043 Axios: Incomplete Fix for CVE-2025-62718 — NO_PROXY Protection Bypassed via RFC 1122 Loopback Subnet (127.0.0.0/8) in Axios 1.15.0

Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, an attacker who can influence the target URL of an Axios request can use any address in the 127.0.0.0/8 range other than 127.0.0.1 to completely bypass the NOPROXY protection. This vulnerability is due t...

CVE-2026-42043 Axios: Incomplete Fix for CVE-2025-62718 — NO_PROXY Protection Bypassed via RFC 1122 Loopback Subnet (127.0.0.0/8) in Axios 1.15.0

Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, an attacker who can influence the target URL of an Axios request can use any address in the 127.0.0.0/8 range other than 127.0.0.1 to completely bypass the NOPROXY protection. This vulnerability is due t...