{"id":"CVE-2026-42044","summary":"Axios: Invisible JSON Response Tampering via Prototype Pollution Gadget in `parseReviver`","details":"Axios is a promise based HTTP client for the browser and Node.js. From 1.0.0 to before 1.15.2, he Axios library is vulnerable to a Prototype Pollution \"Gadget\" attack that allows any Object.prototype pollution in the application's dependency tree to be escalated into surgical, invisible modification of all JSON API responses — including privilege escalation, balance manipulation, and authorization bypass. The default transformResponse function at lib/defaults/index.js:124 calls JSON.parse(data, this.parseReviver), where this is the merged config object. Because parseReviver is not present in Axios defaults, not validated by assertOptions, and not subject to any constraints, a polluted Object.prototype.parseReviver function is called for every key-value pair in every JSON response, allowing the attacker to selectively modify individual values while leaving the rest of the response intact. This vulnerability is fixed in 1.15.2.","aliases":["GHSA-3w6x-2g7m-8v23"],"modified":"2026-07-12T03:55:25.375991119Z","published":"2026-04-24T17:49:49.517Z","related":["CGA-4x8j-h8f5-r539"],"database_specific":{"cwe_ids":["CWE-1321","CWE-915"],"cna_assigner":"GitHub_M","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42044.json"},"references":[{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42044.json"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:16532"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:16534"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:16535"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:16542"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:17657"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:17699"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:19109"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:19375"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:20338"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:20454"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:20889"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:20938"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:21017"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:21338"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:21772"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:22465"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:22629"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:22840"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:23361"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:24471"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:24473"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:24536"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:24539"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:24853"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:25041"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:25089"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:25271"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:25273"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:26214"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:26225"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:26232"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:26234"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:33574"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:34608"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:36107"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:36882"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-42044"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42044.json"},{"type":"ADVISORY","url":"https://github.com/axios/axios/security/advisories/GHSA-3w6x-2g7m-8v23"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42044"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2461624"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/axios/axios","events":[{"introduced":"484aa4fe6addccbd32206a31eb3d2d000843066e"},{"fixed":"582934382e4e0e0bcb679c628071a4203e93cf57"}],"database_specific":{"cpe":"cpe:2.3:a:axios:axios:*:*:*:*:*:node.js:*:*","extracted_events":[{"introduced":"1.0.0"},{"fixed":"1.15.2"},{"fixed":"1.15.1"}],"source":["AFFECTED_FIELD","CPE_RANGE"]}}],"versions":["v1.15.1","v1.15.0","v1.14.0","v1.13.6","v1.13.5","v1.13.4","v1.13.3","v1.13.2","v1.13.1","v1.13.0","v1.12.2","v1.12.1","v1.12.0","v1.11.0","v1.10.0","v1.9.0","v1.8.4","v1.8.3","v1.8.2","v1.8.1","v1.8.0","v1.7.9","v1.7.8","v1.7.7","v1.7.6","v1.7.5","v1.7.4","v1.7.3","v1.7.2","v1.7.1","v1.7.0","v1.7.0-beta.2","v1.7.0-beta.1","v1.7.0-beta.0","v1.6.8","v1.6.7","v1.6.6","v1.6.5","v1.6.4","v1.6.3","v1.6.2","v1.6.1","v1.6.0","v1.5.1","v1.5.0","v1.4.0","v1.3.6","v1.3.5","v1.3.4","v1.3.3","v1.3.2","v1.3.1","v1.3.0","v1.2.6","v1.2.5","v1.2.4","v1.2.3","v1.2.2","1.2.2","v1.2.1","v1.2.0","1.2.0-alpha.1","v1.1.3","v1.1.2","v1.1.1","v1.1.0","v1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42044.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N"}]}