HIGHCVE-2026-4525Published Modified CNA HashiCorp
CVE-2026-4525: Vault Token Leaked to Backends via Authorization: Bearer Passthrough Header
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.
Metrics
- CVSS v3.1
- 7.5
- Severity
- HIGH
- Fixed in
- 2.0.0
- Affected Products
- 2
Fix available
2.0.0
Affected packages
- HashiCorp / Vault< 2.0.0 (from 0.11.2)
- HashiCorp / Vault Enterprise< 2.0.0 (from 0.11.2)
CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HReferences