CVE-2026-101899 · GHSA-44g4-m2mj-wpvx
Axios: CIDR-form NO_PROXY entries are ignored, causing proxy exclusion bypass for internal IP ranges
- Risk score
- 60/100
- CVSS
- 6.9 v4.0
- Exploit chance (30 days)
- 0.5%
- Published
- 30 Sep 2026
Open in the live forecast Today's forecast
What to know
- What it is
- Axios is a promise-based HTTP client for the browser and Node.js. From 1.15.0 until 1.20.0, Axios shouldBypassProxy treats the NO_PROXY CIDR form as a textual hostname suffix instead of evaluating the network range. A request targets an address covered by a CIDR entry in NO_PROXY while a proxy is configured. The CIDR …
- Affected
- axios (npm) >= 1.15.0, < 1.20.0
- Fix
- Upgrade axios to 1.20.0 or later.
- Exploitation
- Public proof of concept
Why it is Amber
- CVSS 6.9 medium
- Public exploit or proof of concept referenced
- On your watchlist: npm
Affected packages
| Package | Ecosystem | Vulnerable | Fixed in |
|---|---|---|---|
| axios | npm | >= 1.15.0, < 1.20.0 | 1.20.0 |
References
- https://github.com/advisories/GHSA-44g4-m2mj-wpvx
- https://github.com/axios/axios/security/advisories/GHSA-44g4-m2mj-wpvx
- https://github.com/axios/axios/pull/11141
- https://github.com/axios/axios/commit/d19040bda7a8be2f82c3c6e1a5bc03917daee39a
- https://github.com/axios/axios/releases/tag/v1.20.0
- https://github.com/advisories/GHSA-44g4-m2mj-wpvx
Original description
Axios is a promise-based HTTP client for the browser and Node.js. From 1.15.0 until 1.20.0, Axios shouldBypassProxy treats the NO_PROXY CIDR form as a textual hostname suffix instead of evaluating the network range. A request targets an address covered by a CIDR entry in NO_PROXY while a proxy is configured. The CIDR bypass rule is not matched, so the request 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. This issue is fixed in version 1.20.0.
Last activity 30 Sep 2026. Patch Forecast updates every hour.