CVE-2026-101903: Axios: ReDoS in fromDataURI data: URL parser freezes the Node event loop (DoS)
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.
CWE-1333
Tracked companies
Mapped from the CVE’s affected-product data, NVD CPE matches, vendor advisories or package feeds. A mapping means the vendor’s software is named, not that its hosted service was exposed.
Status incidents that name it
No tracked status incident names this CVE.
Affected vendors and products
axios: axios
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- github.com/axios/axios/commit/d19040bda7a8be2f82c3c6e1a5bc03917daee39a (opens in new tab)
- github.com/axios/axios/pull/11141 (opens in new tab)
- github.com/axios/axios/releases/tag/v1.20.0 (opens in new tab)
- github.com/axios/axios/security/advisories/GHSA-c29m-xwm3-cm6r (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)