PT-2026-33398 · Hashicorp · Vault+1

Published 2026-04-17 · Updated 2026-04-17 · CVE-2026-4525

Mitre

CVSS v3.1

7.5

High

AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

Fix

Weakness Enumeration

CWE-201

Related Identifiers

CVE-2026-4525

Affected Products

Vault

Vault Enterprise

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-4525 · Security Note
• https://discuss.hashicorp.com/t/hcsec-2026-07-vault-may-expose-tokens-to-auth-plugins-due-to-incorrect-header-sanitization/77344 · Note