Medium severity · published Oct 13, 2026
CVE-2026-101899
Axios: CIDR-form NO_PROXY entries are ignored, causing proxy exclusion bypass for internal IP ranges
6.9
CVSS
0.5%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 43% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AX
axios · axios
>= 1.15.0, < 1.20.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-101899
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-101899
x_refsource_CONFIRM
https://github.com/axios/axios/security/advisories/GHSA-44g4-m2mj-wpvx
x_refsource_MISC
https://github.com/axios/axios/pull/11141
x_refsource_MISC
https://github.com/axios/axios/commit/d19040bda7a8be2f82c3c6e1a5bc03917daee39a
x_refsource_MISC
https://github.com/axios/axios/releases/tag/v1.20.0
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