CVE-2026-67314 axios before 1.18.0 Prototype Pollution via auth subfields
Attackers can tamper with outbound HTTP requests by injecting Basic auth credentials if the application is already vulnerable to prototype pollution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-67314?
CVE-2026-67314 is a medium-severity vulnerability in axios, published on 1 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
axios versions >=1.15.2 and <1.18.0 contain prototype-pollution read-side gadgets in Basic auth subfield handling (lib/adapters/http.js and lib/helpers/resolveConfig.js). When an application is already affected by a separate prototype-pollution primitive and makes an axios request with an own auth object that omits the username and/or password properties, axios reads the inherited Object.prototype.username and Object.prototype.password values and uses them to construct an outbound 'Authorization: Basic ...' header. axios itself does not pollute prototypes. The practical impact is outbound request tampering: an attacker who controls the polluted prototype values can inject attacker-chosen Basic auth credentials or replace an existing Authorization header. Credential disclosure is only possible under additional application-specific conditions.
Weakness: CWE-1321
Which versions are affected by CVE-2026-67314?
2 open source packages ship an affected version, including axios. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
axios npm | From 1.15.2 | 1.18.0 |
axios npm | From 1.15.2 | 1.18.0 |
Products include Axios Axios.
How do I fix CVE-2026-67314?
Upgrade axios to 1.18.0 or later.
Is CVE-2026-67314 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-67314 exists.
Other vulnerabilities in axios
- CVE-2026-44494 Axios: Full Man-in-the-Middle via Prototype Pollution Gadget in `config.proxy`
- CVE-2026-44492 axios's shouldBypassProxy does not recognize IPv4-mapped IPv6 addresses, allowing NO_PROXY bypass (incomplete fix for CVE-2025-62718)
- CVE-2026-67320 axios before 0.33.0 Prototype Pollution via Node HTTP adapter
- CVE-2026-44487 Axios: Proxy-Authorization Credential Leak to Origin Server Across HTTP-to-HTTPS Redirect in Axios Node.js HTTP Adapter
- CVE-2025-27152 Possible SSRF and Credential Leakage via Absolute URL in axios Requests
Sources
Also known as CLEANSTART-2026-UQ32454, CVE-2026-68943, DEBIAN-CVE-2026-67314, ECHO-2457-771f-4c04, GHSA-xj6q-8x83-jv6g, MINI-29w6-p48f-rfvp and 17 more.