{"id":"CVE-2026-67314","state":"PUBLISHED","title":"axios before 1.18.0 Prototype Pollution via auth subfields","description":"axios versions >=1.15.2 and <1.18.0 contain prototype-pollution read-side gadgets in Basic auth subfield handling (lib/adapters/http.js and lib/helpers/resolveConfig.js). When an application is already affected by a separate prototype-pollution primitive and makes an axios request with an own auth object that omits the username and/or password properties, axios reads the inherited Object.prototype.username and Object.prototype.password values and uses them to construct an outbound 'Authorization: Basic ...' header. axios itself does not pollute prototypes. The practical impact is outbound request tampering: an attacker who controls the polluted prototype values can inject attacker-chosen Basic auth credentials or replace an existing Authorization header. Credential disclosure is only possible under additional application-specific conditions.","publishedAt":"2026-08-01T12:22:16.603Z","updatedAt":"2026-08-03T18:06:09.036Z","severity":{"score":6.3,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["axios axios"],"affected":[{"vendor":"axios","product":"axios","packageURL":"pkg:npm/axios","defaultStatus":"unaffected","versions":[{"version":"1.15.2","status":"affected","lessThan":"1.18.0","versionType":"semver"},{"version":"1.18.0","status":"unaffected","versionType":"semver"}]}],"references":["https://github.com/axios/axios/security/advisories/GHSA-xj6q-8x83-jv6g","https://www.vulncheck.com/advisories/axios-before-prototype-pollution-via-auth-subfields"],"weaknesses":["CWE-1321"],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/67xxx/CVE-2026-67314.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-67314","state":"PUBLISHED","datePublished":"2026-08-01T12:22:16.603Z","dateUpdated":"2026-08-03T18:06:09.036Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-07-29T13:06:35.179Z"},"containers":{"cna":{"title":"axios before 1.18.0 Prototype Pollution via auth subfields","descriptions":[{"lang":"en","value":"axios versions >=1.15.2 and <1.18.0 contain prototype-pollution read-side gadgets in Basic auth subfield handling (lib/adapters/http.js and lib/helpers/resolveConfig.js). When an application is already affected by a separate prototype-pollution primitive and makes an axios request with an own auth object that omits the username and/or password properties, axios reads the inherited Object.prototype.username and Object.prototype.password values and uses them to construct an outbound 'Authorization: Basic ...' header. axios itself does not pollute prototypes. The practical impact is outbound request tampering: an attacker who controls the polluted prototype values can inject attacker-chosen Basic auth credentials or replace an existing Authorization header. Credential disclosure is only possible under additional application-specific conditions."}],"affected":[{"vendor":"axios","product":"axios","packageURL":"pkg:npm/axios","defaultStatus":"unaffected","versions":[{"version":"1.15.2","status":"affected","lessThan":"1.18.0","versionType":"semver"},{"version":"1.18.0","status":"unaffected","versionType":"semver"}]}],"references":[{"url":"https://github.com/axios/axios/security/advisories/GHSA-xj6q-8x83-jv6g","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-xj6q-8x83-jv6g)"},{"url":"https://www.vulncheck.com/advisories/axios-before-prototype-pollution-via-auth-subfields","name":"VulnCheck Advisory: axios before 1.18.0 Prototype Pollution via auth subfields","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.3,"baseSeverity":"MEDIUM"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1321","lang":"en","description":"Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-08-01T12:22:16.603Z"},"datePublic":"2026-07-06T00:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:axios:axios:*:*:*:*:*:node.js:*:*","versionStartIncluding":"1.15.2","versionEndExcluding":"1.18.0"}]}]}],"credits":[{"lang":"en","value":"lullu57","type":"reporter"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/axios/axios/security/advisories/GHSA-xj6q-8x83-jv6g","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-03T18:04:28.314777Z","id":"CVE-2026-67314","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-03T18:06:09.036Z"}}]}}}