{"id":"CVE-2026-4525","revision":"227e58e6bc5a47c498797a4544eb23bb","records":[{"revision":"227e58e6bc5a47c498797a4544eb23bb","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-4525","aliases":[],"title":"Vault Token Leaked to Backends via Authorization: Bearer Passthrough Header","description":"If a Vault auth mount is configured to pass through the \"Authorization\" header, and the \"Authorization\" header is used to authenticate to Vault, Vault forwarded the Vault token to the auth plugin backend. Fixed in 2.0.0, 1.21.5, 1.20.10, and 1.19.16.","state":0,"publishedAt":"2026-04-17T03:00:47.561+00:00","modifiedAt":"2026-07-15T00:52:47.241+00:00","affected":[{"ecosystem":"Vendor product","name":"Vault","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"unaffected\",\n                    \"platforms\": [\n                        \"64 bit\",\n                        \"32 bit\",\n                        \"x86\",\n                        \"ARM\",\n                        \"MacOS\",\n                        \"Windows\",\n                        \"Linux\"\n                    ],\n                    \"product\": \"Vault\",\n                    \"repo\": \"https://github.com/hashicorp/vault\",\n                    \"vendor\": \"HashiCorp\",\n                    \"versions\": [\n                        {\n                            \"lessThan\": \"2.0.0\",\n                            \"status\": \"affected\",\n                            \"version\": \"0.11.2\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Vault Enterprise","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"unaffected\",\n                    \"platforms\": [\n                        \"64 bit\",\n                        \"32 bit\",\n                        \"x86\",\n                        \"ARM\",\n                        \"MacOS\",\n                        \"Windows\",\n                        \"Linux\"\n                    ],\n                    \"product\": \"Vault Enterprise\",\n                    \"repo\": \"https://github.com/hashicorp/vault\",\n                    \"vendor\": \"HashiCorp\",\n                    \"versions\": [\n                        {\n                            \"changes\": [\n                                {\n                                    \"at\": \"1.19.16\",\n                                    \"status\": \"unaffected\"\n                                },\n                                {\n                                    \"at\": \"1.20.10\",\n                                    \"status\": \"unaffected\"\n                                },\n                                {\n                                    \"at\": \"1.21.5\",\n                                    \"status\": \"unaffected\"\n                                }\n                            ],\n                            \"lessThan\": \"2.0.0\",\n                            \"status\": \"affected\",\n                            \"version\": \"0.11.2\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.5,"severity":"HIGH"}],"references":["https://discuss.hashicorp.com/t/hcsec-2026-07-vault-may-expose-tokens-to-auth-plugins-due-to-incorrect-header-sanitization/77344"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-4525","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-4525","identifiers":["CVE-2026-4525"]},"retained":false,"historicalAffected":[]}],"coverage":[]}