hashicorp/vault · Security
HashiCorp Vault May Expose Tokens to Auth Plugins Due to Incorrect Header Sanitization
- GHSA ID
- GHSA-72gw-fmmr-c4r4
- CVE ID
- CVE-2026-4525
- Severity
- high
- Published
- Updated
- CVSS
- 7.5 · CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- CVSS v3
- 7.5 · CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
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.
CWEs
- CWE-201 · Insertion of Sensitive Information Into Sent Data
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-4525 ↗
- https://discuss.hashicorp.com/t/hcsec-2026-07-vault-may-expose-tokens-to-auth-plugins-due-to-incorrect-header-sanitization/77344 ↗
- https://access.redhat.com/security/cve/CVE-2026-4525 ↗
- https://bugzilla.redhat.com/show_bug.cgi?id=2459107 ↗
- https://github.com/advisories/GHSA-72gw-fmmr-c4r4 ↗
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4525.json ↗