{"id":"CVE-2026-4525","summary":"Vault Token Leaked to Backends via Authorization: Bearer Passthrough Header","details":"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.","aliases":["BIT-vault-2026-4525","GHSA-72gw-fmmr-c4r4","GO-2026-5199"],"modified":"2026-07-16T03:30:49.701526371Z","published":"2026-04-17T03:00:47.561Z","related":["CGA-q7qc-8prw-38qg"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4525.json","cna_assigner":"HashiCorp","cwe_ids":["CWE-201"]},"references":[{"type":"WEB","url":"https://discuss.hashicorp.com/t/hcsec-2026-07-vault-may-expose-tokens-to-auth-plugins-due-to-incorrect-header-sanitization/77344"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4525.json"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-4525"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4525.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4525"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2459107"},{"type":"PACKAGE","url":"https://github.com/hashicorp/vault"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/hashicorp/vault","events":[{"introduced":"2b1a4304374712953ff606c6a925bbe90a4e85dd"},{"fixed":"cf1ce4df8af6e323558bd5f8c37e771388cbc951"}],"database_specific":{"source":["AFFECTED_FIELD","CPE_RANGE"],"cpe":"cpe:2.3:a:hashicorp:vault:*:*:*:*:-:*:*:*","extracted_events":[{"introduced":"0.11.2"},{"fixed":"2.0.0"}]}}],"versions":["v2.0.0-rc1","sdk/v0.19.0","api/v1.21.0","sdk/v0.14.1","sdk/v0.18.0","api/auth/userpass/v0.10.0","api/auth/ldap/v0.10.0","api/auth/kubernetes/v0.10.0","api/auth/gcp/v0.10.0","api/auth/azure/v0.9.0","api/auth/aws/v0.10.0","api/auth/approle/v0.10.0","api/v1.20.0","sdk/v0.17.0","sdk/v0.16.0","sdk/v0.15.0","api/auth/userpass/v0.9.0","api/auth/ldap/v0.9.0","api/auth/kubernetes/v0.9.0","api/auth/gcp/v0.9.0","api/auth/azure/v0.8.0","api/auth/aws/v0.9.0","api/auth/approle/v0.9.0","api/v1.16.0","sdk/v0.14.0","api/auth/userpass/v0.8.0","api/auth/ldap/v0.8.0","api/auth/kubernetes/v0.8.0","api/auth/gcp/v0.8.0","api/auth/azure/v0.7.0","api/auth/aws/v0.8.0","api/auth/approle/v0.8.0","api/v1.15.0","sdk/v0.13.0","api/auth/userpass/v0.7.0","api/auth/ldap/v0.7.0","api/auth/kubernetes/v0.7.0","api/auth/gcp/v0.7.0","api/auth/azure/v0.6.0","api/auth/aws/v0.7.0","api/auth/approle/v0.7.0","api/v1.14.0","api/v1.13.0","sdk/v0.12.0","api/v1.12.2","sdk/v0.11.1","api/v1.12.1","api/auth/userpass/v0.6.0","api/auth/ldap/v0.6.0","api/auth/kubernetes/v0.6.0","api/auth/gcp/v0.6.0","api/auth/aws/v0.6.0","api/auth/approle/v0.6.0","sdk/v0.11.0","api/v1.12.0","api/v1.11.0","sdk/v0.10.1","api/auth/userpass/v0.5.0","api/auth/ldap/v0.5.0","api/auth/kubernetes/v0.5.0","api/auth/gcp/v0.5.0","api/auth/azure/v0.5.0","api/auth/aws/v0.5.0","api/auth/approle/v0.5.0","sdk/v0.10.0","api/v1.10.0","sdk/v0.9.2","api/auth/userpass/v0.4.1","api/auth/ldap/v0.4.1","api/auth/kubernetes/v0.4.1","api/auth/gcp/v0.4.1","api/auth/azure/v0.4.1","api/auth/aws/v0.4.1","api/auth/approle/v0.4.1","sdk/v0.9.1","api/v1.9.2","api/v1.9.1","sdk/v0.9.0","api/auth/userpass/v0.4.0","api/auth/ldap/v0.4.0","api/auth/kubernetes/v0.4.0","api/auth/gcp/v0.4.0","api/auth/azure/v0.4.0","api/auth/aws/v0.4.0","api/auth/approle/v0.4.0","sdk/v0.8.0","api/v1.9.0","api/v1.8.3","sdk/v0.7.0","sdk/v0.6.2","sdk/v0.6.1","api/v1.8.2","api/v1.8.1","api/auth/userpass/v0.3.0","api/auth/ldap/v0.3.0","api/auth/kubernetes/v0.3.0","api/auth/gcp/v0.3.0","api/auth/azure/v0.3.0","api/auth/aws/v0.3.0","api/auth/approle/v0.3.0","api/v1.8.0","sdk/v0.6.0","api/auth/userpass/v0.2.0","api/auth/ldap/v0.2.0","api/auth/kubernetes/v0.2.0","api/auth/gcp/v0.2.0","api/auth/azure/v0.2.0","api/auth/aws/v0.2.0","api/auth/approle/v0.2.0","sdk/v0.5.3","api/v1.7.2","sdk/v0.5.1","api/v1.7.1","api/v1.7.0","api/v1.6.0","sdk/v0.5.0","api/v1.5.0","sdk/v0.4.1","last-go-modable","api/auth/ldap/v0.1.0","api/v1.3.1","api/auth/approle/v0.1.1","main-creation","api/auth/gcp/v0.1.0","api/auth/azure/v0.1.0","api/auth/userpass/v0.1.0","api/auth/kubernetes/v0.1.0","api/auth/aws/v0.1.0","api/auth/approle/v0.1.0","sdk/v0.3.0","api/v1.2.0","api/v1.1.1","sdk/v0.2.1","v1.2.0","v1.2.0-rc1","api/v1.0.4","sdk/v0.1.13","api/v1.0.3","sdk/v0.1.12","v1.2.0-beta2","v1.2.0-beta1","sdk/v0.1.11","sdk/v0.1.10","api/v1.0.2","v1.1.1","sdk/v0.1.9","api/v1.0.1","sdk/v0.1.8","v1.1.0","v1.1.0-beta2","v1.1.0-beta1","v1.0.3","v1.0.2","v1.0.1","v1.0.0","v1.0.0-rc1","v1.0.0-beta2","v1.0.0-beta1","v0.11.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-4525.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}