{"id":"CVE-2026-101903","published":"2026-09-28T18:17:18.560","lastModified":"2026-09-28T18:17:18.560","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.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":["CWE-1333"],"vendors":[],"products":[],"references":[{"url":"https://github.com/axios/axios/commit/d19040bda7a8be2f82c3c6e1a5bc03917daee39a","tags":[]},{"url":"https://github.com/axios/axios/pull/11141","tags":[]},{"url":"https://github.com/axios/axios/releases/tag/v1.20.0","tags":[]},{"url":"https://github.com/axios/axios/security/advisories/GHSA-c29m-xwm3-cm6r","tags":[]},{"url":"https://github.com/axios/axios/security/advisories/GHSA-c29m-xwm3-cm6r","tags":[]}],"exploitRefs":[{"url":"https://github.com/axios/axios/commit/d19040bda7a8be2f82c3c6e1a5bc03917daee39a","tags":[]},{"url":"https://github.com/axios/axios/pull/11141","tags":[]},{"url":"https://github.com/axios/axios/releases/tag/v1.20.0","tags":[]},{"url":"https://github.com/axios/axios/security/advisories/GHSA-c29m-xwm3-cm6r","tags":[]},{"url":"https://github.com/axios/axios/security/advisories/GHSA-c29m-xwm3-cm6r","tags":[]}],"hasPoc":true,"ai":null}