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CVE-2026-42042— Axios: XSRF Token Cross-Origin Leakage via Prototype Pollution Gadget in `withXSRFToken` Boolean Coercion

CVSS 5.4 · Medium EPSS 0.03% · P10
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I. Basic Information for CVE-2026-42042

Vulnerability Information
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Vulnerability Title
Axios: XSRF Token Cross-Origin Leakage via Prototype Pollution Gadget in `withXSRFToken` Boolean Coercion
Source: NVD (National Vulnerability Database)
Vulnerability Description
Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, the Axios library's XSRF token protection logic uses JavaScript truthy/falsy semantics instead of strict boolean comparison for the withXSRFToken config property. When this property is set to any truthy non-boolean value (via prototype pollution or misconfiguration), the same-origin check (isURLSameOrigin) is short-circuited, causing XSRF tokens to be sent to all request targets including cross-origin servers controlled by an attacker. This vulnerability is fixed in 1.15.1 and 0.31.1.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
宽松定义的白名单
Source: NVD (National Vulnerability Database)
Vulnerability Title
Axios 安全漏洞
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 1.15.1之前版本和0.31.1之前版本存在安全漏洞，该漏洞源于XSRF令牌保护逻辑使用JavaScript真值/假值语义而非严格布尔比较，导致同源检查被短路，XSRF令牌发送到所有请求目标。
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

VendorProductAffected VersionsCPESubscribe
axiosaxios >= 1.0.0, < 1.15.1 -

II. Public POCs for CVE-2026-42042

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III. Intelligence Information for CVE-2026-42042

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Same Patch Batch · axios · 2026-04-24 · 12 CVEs total

CVE-2026-420337.4 HIGHAxios: Prototype Pollution Gadgets - Response Tampering, Data Exfiltration, and Request Hi
CVE-2026-420357.4 HIGHAxios: Header Injection via Prototype Pollution
CVE-2026-420437.2 HIGHAxios: Incomplete Fix for CVE-2025-62718 — NO_PROXY Protection Bypassed via RFC 1122 Loop
CVE-2026-420386.8 MEDIUMAxios: no_proxy bypass via IP alias allows SSRF
CVE-2026-420446.5 MEDIUMAxios: Invisible JSON Response Tampering via Prototype Pollution Gadget in `parseReviver`
CVE-2026-420375.3 MEDIUMAxios: CRLF Injection in multipart/form-data body via unsanitized blob.type in formDataToS
CVE-2026-420345.3 MEDIUMAxios: HTTP adapter streamed uploads bypass maxBodyLength when maxRedirects: 0
CVE-2026-420365.3 MEDIUMAxios: HTTP adapter streamed responses bypass maxContentLength
CVE-2026-420414.8 MEDIUMAxios: Authentication Bypass via Prototype Pollution Gadget in `validateStatus` Merge Stra
CVE-2026-420403.7 LOWAxios: Null Byte Injection via Reverse-Encoding in AxiosURLSearchParams
CVE-2026-42039Axios: unbounded recursion in toFormData causes DoS via deeply nested request data

IV. Related Vulnerabilities

Same product: axios
Same vendor: axios
Same weakness: CWE-183

V. Comments for CVE-2026-42042

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