CVE-2026-4525

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.6 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://discuss.hashicorp.com/t/hcsec-2026-07-vault-may-expose-tokens-to-auth-plugins-due-to-incorrect-header-sanitization/77344	Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-4525
https://bugzilla.redhat.com/show_bug.cgi?id=2459107
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4525.json

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:hashicorp:vault:::::enterprise:::*
	cpe:2.3:a:hashicorp:vault:::::-:::*
	cpe:2.3:a:hashicorp:vault:::::enterprise:::*
	cpe:2.3:a:hashicorp:vault:::::enterprise:::*

History

25 Oct 2026, 23:10

Type	Values Removed	Values Added
Summary		(es) Si un montaje de autenticación de Vault está configurado para pasar el encabezado ’Authorization’, y el encabezado ’Authorization’ se utiliza para autenticarse en Vault, Vault reenvió el token de Vault al backend del plugin de autenticación. Corregido en 2.0.0, 1.21.5, 1.20.10 y 1.19.16.

Information

Published : 2026-04-17 04:16

Updated : 2026-10-25 23:10

NVD link : CVE-2026-4525

Mitre link : CVE-2026-4525

CVE.ORG link : CVE-2026-4525

JSON object : View

Products Affected

hashicorp

vault

CWE

CWE-201

Insertion of Sensitive Information Into Sent Data

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Fixed in 2.0.0, 1.21.5, 1.20.10, and 1.19.16."}, {"lang": "es", "value": "Si un montaje de autenticaci\u00f3n de Vault est\u00e1 configurado para pasar el encabezado \u2019Authorization\u2019, y el encabezado \u2019Authorization\u2019 se utiliza para autenticarse en Vault, Vault reenvi\u00f3 el token de Vault al backend del plugin de autenticaci\u00f3n. Corregido en 2.0.0, 1.21.5, 1.20.10 y 1.19.16."}], "lastModified": "2026-10-25T23:10:00.167", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:hashicorp:vault:*:*:*:*:enterprise:*:*:*", "vulnerable": true, "matchCriteriaId": "E12BA6D9-0FDE-4CA9-8D01-35CD029D15D2", "versionEndExcluding": "1.19.16", "versionStartIncluding": "0.11.2"}, {"criteria": "cpe:2.3:a:hashicorp:vault:*:*:*:*:-:*:*:*", "vulnerable": true, "matchCriteriaId": "48995D65-70D6-476A-ACD7-2A8F527D2975", "versionEndExcluding": "2.0.0", "versionStartIncluding": "0.11.2"}, {"criteria": "cpe:2.3:a:hashicorp:vault:*:*:*:*:enterprise:*:*:*", "vulnerable": true, "matchCriteriaId": "E2135CCF-F6D8-41AC-8D0C-F763F63974B4", "versionEndExcluding": "1.20.10", "versionStartIncluding": "1.20.0"}, {"criteria": "cpe:2.3:a:hashicorp:vault:*:*:*:*:enterprise:*:*:*", "vulnerable": true, "matchCriteriaId": "C8097BD2-0B19-4BA7-930E-93A5A89EC4AF", "versionEndExcluding": "1.21.5", "versionStartIncluding": "1.21.0"}], "operator": "OR"}]}], "sourceIdentifier": "security@hashicorp.com"}