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CVE-2026-44489— Axios: Proxy-Authorization Header Injection via Prototype Pollution — Incomplete Null-Prototype Fix

Quick assessment

Affected
axios axios
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Axios是Axios开源的一款基于Promise（异步编程的一种解决方案）的HTTP客户端。 Axios 1.15.2至1.16.0之前版本存在注入漏洞，该漏洞源于utils.merge()创建的嵌套对象未进行hasOwnProperty检查，可能导致原型污染后注入Proxy-Authorization标头。

CVSS 3.7 · Low EPSS 0.30% · P21

Affected Version Matrix 1

VendorProduct Version RangeStatus
axios axios 1.15.2 affected
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I. Basic Information for CVE-2026-44489

Vulnerability Information
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Vulnerability Title
Axios: Proxy-Authorization Header Injection via Prototype Pollution — Incomplete Null-Prototype Fix
Source: CVE Program / CVE List V5
Vulnerability Description
Axios is a promise based HTTP client for the browser and Node.js. From 1.15.2 to before 1.16.0, nested objects created by utils.merge() (e.g., config.proxy) are still constructed as plain {} with Object.prototype in their chain. The setProxy() function at lib/adapters/http.js:209-223 reads proxy.username, proxy.password, and proxy.auth without hasOwnProperty checks. When Object.prototype.username is polluted, setProxy() constructs a Proxy-Authorization header with attacker-controlled credentials and injects it into every proxied HTTP request. This vulnerability is fixed in 1.16.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
HTTP头部中CRLF序列转义处理不恰当(HTTP响应分割)
Source: CVE Program / CVE List V5
Vulnerability Title
Axios 注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Axios是Axios开源的一款基于Promise（异步编程的一种解决方案）的HTTP客户端。 Axios 1.15.2至1.16.0之前版本存在注入漏洞，该漏洞源于utils.merge()创建的嵌套对象未进行hasOwnProperty检查，可能导致原型污染后注入Proxy-Authorization标头。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
axios axios 1.15.2 -

II. Public POCs for CVE-2026-44489

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III. Intelligence Information for CVE-2026-44489

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Vendor Advisories for CVE-2026-44489 (1)

Same Patch Batch · axios · 2026-06-11 · 9 CVEs total

CVE-2026-44494 8.7 HIGH Axios: Full Man-in-the-Middle via Prototype Pollution Gadget in `config.proxy`
CVE-2026-44492 8.6 HIGH Axios: shouldBypassProxy does not recognize IPv4-mapped IPv6 addresses, allowing NO_PROXY
CVE-2026-44487 8.2 HIGH Axios: Proxy-Authorization Credential Leak to Origin Server Across HTTP-to-HTTPS Redirect
CVE-2026-44488 7.5 HIGH Axios: Allocation of Resources Without Limits or Throttling in axios
CVE-2026-44496 7.5 HIGH Axios: Regular Expression Denial of Service (ReDoS) via Cookie Name Injection
CVE-2026-44486 7.5 HIGH Axios: Proxy-Authorization header leaks to redirect target when proxy is re-evaluated to d
CVE-2026-44495 7.0 HIGH Axios: Credential Theft and Response Hijacking via Prototype Pollution Gadget in Config Me
CVE-2026-44490 4.8 MEDIUM Axios: DoS & Header Injection via Prototype Pollution Read-Side Gadgets in axios merge fun

IV. Related Vulnerabilities

Same product: axios
Same vendor: axios
Same weakness: CWE-113

V. Comments for CVE-2026-44489

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