High 8.2Published Sep 28, 2026

CVE-2026-101906Axios: ReDoS (O(N²)) in shouldBypassProxy host normalization, reachable via untrusted redirect Location

Updated under an hour ago (2026-10-19 08:50 UTC)

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It affects axios. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.40%, higher than 32% of scored CVEs.

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Exploited in the last 30 days

Axios is a promise-based HTTP client for the browser and Node.js. From 1.15.0 until 1.20.0, Axios shouldBypassProxy applies a quadratic trailing-dot regular expression to redirect hostnames. HTTP_PROXY or HTTPS_PROXY is configured, NO_PROXY or no_proxy is non-empty, redirects are followed, and a crafted redirect Location contains many dots followed by a non-dot character. Hostname.replace(/.+$/, '') backtracks quadratically while processing the crafted redirect hostname. Synchronous regular-expression processing can block the Node.js event loop and cause denial of service. This issue is fixed in version 1.20.0.

CVSS: 8.2 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Weakness (CWE): CWE-400, CWE-1333
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.40% (percentile 32)
Assigned by: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Sep 28, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

axios axios axios:axios (from the name)	from 1.15.0, < 1.20.0	CNA record

References

https://github.com/axios/axios/security/advisories/GHSA-mghh-pgcx-3jjjx-refsource-confirm
https://github.com/axios/axios/pull/11141x-refsource-misc
https://github.com/axios/axios/commit/d19040bda7a8be2f82c3c6e1a5bc03917daee39ax-refsource-misc
https://github.com/axios/axios/releases/tag/v1.20.0x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.