Axios up to 1.19.x Data URI Parser fromDataURI denial of service

Summaryinfo

A vulnerability categorized as problematic has been discovered in Axios up to 1.19.x. This issue affects the function fromDataURI of the component Data URI Parser. Executing a manipulation can lead to denial of service. This vulnerability appears as CVE-2026-101903. The attack may be performed from remote. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Axios up to 1.19.x. It has been declared as problematic. This vulnerability affects the function fromDataURI of the component Data URI Parser. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability was named CVE-2026-101903 since 09/28/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 1.20.0 eliminates this vulnerability.

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Productinfo

Name

• Axios

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19

Website

• Product: https://github.com/axios/axios/

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