CVE-2025-62718

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 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. This goes against what developers expect and lets attackers force requests through a proxy, even if NO_PROXY is set up to protect loopback or internal services. This issue leads to the possibility of proxy bypass and SSRF vulnerabilities allowing attackers to reach sensitive loopback or internal services despite the configured protections. This vulnerability is fixed in 1.15.0 and 0.31.0.

Weakness

The product receives a request, message, or directive from an upstream component, but the product does not sufficiently preserve the original source of the request before forwarding the request to an external actor that is outside of the product’s control sphere. This causes the product to appear to be the source of the request, leading it to act as a proxy or other intermediary between the upstream component and the external actor.

Affected Software

Extended Description

If an attacker cannot directly contact a target, but the product has access to the target, then the attacker can send a request to the product and have it be forwarded to the target. The request would appear to be coming from the product’s system, not the attacker’s system. As a result, the attacker can bypass access controls (such as firewalls) or hide the source of malicious requests, since the requests would not be coming directly from the attacker. Since proxy functionality and message-forwarding often serve a legitimate purpose, this issue only becomes a vulnerability when:

Potential Mitigations

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/219.html
• https://cwe.mitre.org/data/definitions/465.html

References

• https://datatracker.ietf.org/doc/html/rfc1034#section-3.1
• https://datatracker.ietf.org/doc/html/rfc3986#section-3.2.2
• https://github.com/axios/axios/commit/03cdfc99e8db32a390e12128208b6778492cee9c
• https://github.com/axios/axios/commit/fb3befb6daac6cad26b2e54094d0f2d9e47f24df
• https://github.com/axios/axios/pull/10661
• https://github.com/axios/axios/pull/10688
• https://github.com/axios/axios/releases/tag/v0.31.0
• https://github.com/axios/axios/releases/tag/v1.15.0
• https://github.com/axios/axios/security/advisories/GHSA-3p68-rc4w-qgx5
• https://github.com/axios/axios/security/advisories/GHSA-3p68-rc4w-qgx5