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CVE-2026-101903 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

No CVSS 3.x data is available for this CVE.

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/axios/axios/security/advisories/GHSA-c29m-xwm3-cm6r	CISA-ADP
https://github.com/axios/axios/commit/d19040bda7a8be2f82c3c6e1a5bc03917daee39a	[email protected]
https://github.com/axios/axios/pull/11141	[email protected]
https://github.com/axios/axios/releases/tag/v1.20.0	[email protected]
https://github.com/axios/axios/security/advisories/GHSA-c29m-xwm3-cm6r	[email protected]

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-1333	Inefficient Regular Expression Complexity	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Sep 28, 2026	New CVE Received	[email protected]
Sep 28, 2026	CVE Modified	CISA-ADP