Vulnerability DatabaseCVE-2026-4525
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CVE-2026-4525
Published:April 17, 2026
Updated:August 06, 2026
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.
Related Resources (8)
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4525.json
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4525.json
https://discuss.hashicorp.com/t/hcsec-2026-07-vault-may-expose-tokens-to-auth-plugins-due-to-incorrect-header-sanitization/77344
https://nvd.nist.gov/vuln/detail/CVE-2026-4525
https://github.com/hashicorp/vault
https://github.com/advisories/GHSA-72gw-fmmr-c4r4
https://access.redhat.com/security/cve/CVE-2026-4525
https://bugzilla.redhat.com/show_bug.cgi?id=2459107
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CVSS v4
Base Score:
7.7
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Insertion of Sensitive Information Into Sent Data
CWE-201
EPSS
Base Score:
0.41