CVE-2026-101903

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.

CVSS

No CVSS.

References

Link	Resource
https://github.com/axios/axios/commit/d19040bda7a8be2f82c3c6e1a5bc03917daee39a
https://github.com/axios/axios/pull/11141
https://github.com/axios/axios/releases/tag/v1.20.0
https://github.com/axios/axios/security/advisories/GHSA-c29m-xwm3-cm6r
https://github.com/axios/axios/security/advisories/GHSA-c29m-xwm3-cm6r

Configurations

No configuration.

History

28 Sep 2026, 18:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-28 18:17

Updated : 2026-09-30 19:38

NVD link : CVE-2026-101903

Mitre link : CVE-2026-101903

CVE.ORG link : CVE-2026-101903

JSON object : View

Products Affected

No product.

CWE

CWE-1333

Inefficient Regular Expression Complexity

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