CVE-2026-67320
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk23th percentile - higher than 23% of all known CVEs
Summary
axios in a Node.js deployment using the HTTP adapter can route requests through an attacker-controlled proxy. axios hardens merged request configuration by creating a null-prototype object, but request interceptors run after the merge; a common immutable interceptor pattern such as {...config} or Object.assign({}, config) converts the hardened config back into a regular object. axios then dispatches that object without re-hardening it, and the Node HTTP adapter reads config.proxy through the prototype chain. If an attacker can pollute Object.prototype.proxy, affected requests can be routed through an attacker-controlled proxy. For plaintext HTTP requests, the proxy can observe Authorization headers, Basic auth from config.auth, method, absolute URL, Host, and request body, and can return its own response. This does not establish browser impact or HTTPS header/body disclosure under normal TLS validation. Affected versions are >=0.31.1 (fixed in 0.33.0) and >=1.15.2 (fixed in 1.18.0).
Risk Assessment
An attacker can intercept sensitive authentication data and HTTP request bodies, leading to data exfiltration and potential session hijacking.
Recommendation
Update axios to version 0.33.0 (for 0.x branch) or 1.18.0 (for 1.x branch). Avoid using the {...config} or Object.assign({}, config) pattern in interceptors if possible.
Other vulnerabilities in axios
See all- CVE-2026-101899Medium
Axios versions 1.15.0 through 1.20.0 incorrectly treat NO_PROXY CIDR entries as textual hostname suffixes instead of network ranges. A request to an address covered by a CIDR entry in NO_PROXY is not matched and is sent through the configured proxy. For plaintext HTTP the proxy can observe and modify URLs, headers, and bodies; for HTTPS it can observe connection metadata and CONNECT requests.
- GHSA-pmv8-rq9r-6j72Medium
Axios versions starting with 0.28.0 contain uncontrolled recursion in formDataToJSON, which is exposed as axios.formToJSON() and used internally when axios serialises FormData with Content-Type: application/json. If an application passes attacker-controlled FormData field names, it can lead to stack exhaustion.
- GHSA-7q8q-rj6j-mhjqMedium
Axios can consume inherited properties from nested request option objects when the JavaScript process already has a polluted Object.prototype. The top-level merged config is protected with a null prototype, but nested plain objects such as auth and paramsSerializer are cloned into objects with a prototype.
- CVE-2025-27152High
A vulnerability in the axios library allows sending requests to absolute URLs instead of relative ones, potentially leading to SSRF attacks and credential leakage. Even with baseURL set, axios ignores it and sends the request to the specified absolute URL.
- GHSA-mmx7-hfxf-jppxMedium
Axios is vulnerable to read-side prototype-pollution gadgets when Object.prototype has already been polluted by another vulnerability or dependency. The most broadly reachable issue is in the bodyless method aliases: axios.get(), axios.delete(), axios.head(), and axios.options().
- CVE-2023-45857Medium
An issue in Axios 1.5.1 inadvertently reveals the confidential XSRF-TOKEN stored in cookies by including it in the HTTP header X-XSRF-TOKEN for every request made to any host, allowing attackers to view sensitive information.
- GHSA-42h9-826w-cgv3Medium
Axios versions 0.28.0 and later contain uncontrolled recursion in formDataToJSON, the helper behind the public axios.formToJSON() / named formToJSON API and the default request transform used when FormData is sent with an application/json content type.
- CVE-2025-62718Critical
A vulnerability in Axios prior to versions 1.15.0 and 0.31.0 incorrectly handles hostname normalization when checking NO_PROXY rules. Requests to loopback addresses like localhost. (with a trailing dot) or [::1] (IPv6 literal) skip NO_PROXY matching and go through the configured proxy.
- CVE-2026-101909High
Axios from 0.28.0 until 0.34.0 and 1.15.1 until 1.20.0 processes inherited serialization options and visitor properties supplied through prototype pollution. A separate same-process prototype-pollution flaw supplies inherited dots, indexes, metaTokens, maxDepth, visitor, or Blob values before object serialization. The inherited options alter toFormData field naming and data interpretation, maxDepth can force request failure, Blob changes value handling, and a polluted visitor can execute when an attacker already has the stronger ability to inject a function.
- CVE-2026-101908Medium
In Axios from version 1.7.0 to 1.20.0, the fetch adapter constructs a Request with sanitized resolvedOptions but then calls fetch with the original fetchOptions. A separate same-process prototype-pollution flaw populates Object.prototype.headers so fetchOptions.headers resolves through inheritance. The inherited fetchOptions.headers value overrides the sanitized Request headers through the second argument to fetch after Request construction. Attacker-controlled request headers can alter authorization, caching, metadata-service access, or application-specific behavior.
Original NVD description (English source)
axios in a Node.js deployment using the HTTP adapter can route requests through an attacker-controlled proxy. axios hardens merged request configuration by creating a null-prototype object, but request interceptors run after the merge; a common immutable interceptor pattern such as {...config} or Object.assign({}, config) converts the hardened config back into a regular object. axios then dispatches that object without re-hardening it, and the Node HTTP adapter reads config.proxy through the prototype chain. If an attacker can pollute Object.prototype.proxy, affected requests can be routed through an attacker-controlled proxy. For plaintext HTTP requests, the proxy can observe Authorization headers, Basic auth from config.auth, method, absolute URL, Host, and request body, and can return its own response. This does not establish browser impact or HTTPS header/body disclosure under normal TLS validation. Affected versions are >=0.31.1 (fixed in 0.33.0) and >=1.15.2 (fixed in 1.18.0).
Vulnerability data from NVD (NIST) · CISA KEV · EPSS