{"id":"CVE-2026-101903","title":"Axios is a promise-based HTTP client for the browser and Node.js","summary":"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 m…","severity":"high","cvss":8.2,"cvssVector":"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","cwe":["CWE-1333"],"vendor":"axios","product":"axios","affected":["axios >= 1.16.1, < 1.20.0"],"patched":["axios 1.20.0"],"published":"2026-09-28","updated":"2026-09-30","sourceUpdated":"2026-09-30T19:38:27.293","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-101903","references":[{"url":"https://github.com/axios/axios/commit/d19040bda7a8be2f82c3c6e1a5bc03917daee39a","label":"security-advisories@github.com"},{"url":"https://github.com/axios/axios/pull/11141","label":"security-advisories@github.com"},{"url":"https://github.com/axios/axios/releases/tag/v1.20.0","label":"security-advisories@github.com"},{"url":"https://github.com/axios/axios/security/advisories/GHSA-c29m-xwm3-cm6r","label":"security-advisories@github.com"},{"url":"https://github.com/axios/axios/security/advisories/GHSA-c29m-xwm3-cm6r","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-101903.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-101903"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2542580"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-101903"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-101903"},{"url":"https://github.com/advisories/GHSA-c29m-xwm3-cm6r"},{"url":"https://access.redhat.com/errata/RHSA-2026:74871"},{"url":"https://access.redhat.com/errata/RHSA-2026:74869"},{"url":"https://access.redhat.com/errata/RHSA-2026:74872"}],"tags":["nvd","cve.org","exploit-available","csaf","vex","red-hat","ghsa","npm"],"epss":0.00436,"epssPercentile":0.37678,"aliases":["GHSA-c29m-xwm3-cm6r"],"ecosystem":"npm","exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-28T17:48:43.428191Z"},"cvssSource":"cna","scores":{"cna":8.2,"vendor":7.5},"ingestedAt":"2026-09-28T18:17:54.306Z","slug":"CVE-2026-101903","body":"## Overview\n\nAxios 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-101903)\n\nAffected packages:\n\n- `axios >= 1.16.1, < 1.20.0`\n\nPatched in:\n\n- `axios 1.20.0`\n\nSource: https://github.com/advisories/GHSA-c29m-xwm3-cm6r\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Red Hat Hardened Images · no fix planned: Red Hat Hardened Images · updated 2026-09-28 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-101903.json)\n- **RHSA-2026:74871** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-10-02 · [advisory](https://access.redhat.com/errata/RHSA-2026:74871)\n- **RHSA-2026:74869** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-10-02 · [advisory](https://access.redhat.com/errata/RHSA-2026:74869)\n- **RHSA-2026:74872** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-10-02 · [advisory](https://access.redhat.com/errata/RHSA-2026:74872)","depth":"midnight","depthScore":57,"depthScoreParts":{"impact":45.1,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[]}