{"id":"CVE-2026-101903","summary":"Axios: ReDoS in fromDataURI data: URL parser freezes the Node event loop (DoS)","details":"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.","aliases":["GHSA-c29m-xwm3-cm6r"],"modified":"2026-09-30T03:47:03.448478947Z","published":"2026-09-28T17:25:04.448Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-1333"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/101xxx/CVE-2026-101903.json"},"references":[{"type":"WEB","url":"https://github.com/axios/axios/releases/tag/v1.20.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/101xxx/CVE-2026-101903.json"},{"type":"ADVISORY","url":"https://github.com/axios/axios/security/advisories/GHSA-c29m-xwm3-cm6r"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-101903"},{"type":"FIX","url":"https://github.com/axios/axios/commit/d19040bda7a8be2f82c3c6e1a5bc03917daee39a"},{"type":"FIX","url":"https://github.com/axios/axios/pull/11141"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/axios/axios","events":[{"introduced":"1337d6b537afb2d3f501074c8ac4ef4308221197"},{"fixed":"d19040bda7a8be2f82c3c6e1a5bc03917daee39a"},{"fixed":"84a9f3b9a4f3244b8c8e818f557d64c7b964fb25"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"1.16.1"},{"fixed":"1.20.0"}]}}],"versions":["v1.19.0","v1.18.1","v1.18.0","v1.17.0","v1.16.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-101903.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}]}