{"id":"CVE-2026-42042","summary":"Axios: XSRF Token Cross-Origin Leakage via Prototype Pollution Gadget in `withXSRFToken` Boolean Coercion","details":"Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, the Axios library's XSRF token protection logic uses JavaScript truthy/falsy semantics instead of strict boolean comparison for the withXSRFToken config property. When this property is set to any truthy non-boolean value (via prototype pollution or misconfiguration), the same-origin check (isURLSameOrigin) is short-circuited, causing XSRF tokens to be sent to all request targets including cross-origin servers controlled by an attacker. This vulnerability is fixed in 1.15.1 and 0.31.1.","aliases":["GHSA-xx6v-rp6x-q39c"],"modified":"2026-05-18T06:00:10.205644184Z","published":"2026-04-24T18:03:29.924Z","related":["CGA-9283-q4c6-fjcr"],"database_specific":{"cwe_ids":["CWE-183","CWE-201"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42042.json","cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42042.json"},{"type":"ADVISORY","url":"https://github.com/axios/axios/security/advisories/GHSA-xx6v-rp6x-q39c"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42042"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/axios/axios","events":[{"introduced":"484aa4fe6addccbd32206a31eb3d2d000843066e"},{"fixed":"a589dc525af12e0fabef7d6e5be028ad433eee31"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-42042.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N"}]}