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.

Score

CVSS 3.1 8.8 High

Status

Modified - security@hashicorp.com

Published

2026-04-17

Last modified

2026-10-25

Weaknesses

CWE-201

Affected products

• Vault (Hashicorp)
• Vault Enterprise (Hashicorp)
• Openshift (Redhat)
• Openshift Data Foundation (Redhat)

References

• https://discuss.hashicorp.com/t/hcsec-2026-07-vault-may-expose-tokens-to-auth-plugins-due-to-incorrect-header-sanitizat…
• 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