CVE-2026-101903

Name	CVE-2026-101903
Description	Axios is a promise-based HTTP client for the browser and Node.js. From 1.16.1 until 1.20.0, the RFC 2397 regular expression allows slash characters on both sides of the media-type separator. An application passes an attacker-controlled malformed data URL containing many slash characters and no comma. the JavaScript regular-expression engine explores many separator placements before rejecting the URL. Synchronous excessive backtracking can block the Node.js event loop and cause denial of service. The affected identifiers are fromDataURI, DATA_URL_PATTERN, data:. This issue is fixed in version 1.20.0.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
node-axios (PTS)	bookworm	1.2.1+dfsg-1+deb12u1	vulnerable
	trixie	1.8.4+dfsg-1	vulnerable
	forky, sid	1.20.0-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
node-axios	source	(unstable)	1.20.0-1

Notes

https://github.com/axios/axios/security/advisories/GHSA-c29m-xwm3-cm6r
https://github.com/axios/axios/pull/11141
Fixed by: https://github.com/axios/axios/commit/d19040bda7a8be2f82c3c6e1a5bc03917daee39a (v1.20.0)