CVE-2021-38554

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-08-13 · updated 2026-06-17
Weakness: CWE-212

Description

HashiCorp Vault and Vault Enterprise’s UI erroneously cached and exposed user-viewed secrets between sessions in a single shared browser. Fixed in 1.8.0 and pending 1.7.4 / 1.6.6 releases.

Affected products

HashiCorp Vault: before 1.8.0 — fixed in 1.8.0

How to fix

Upgrade to a fixed version: HashiCorp Vault 1.8.0. Check the vendor advisory for mitigations.

References

https://discuss.hashicorp.com/t/hcsec-2021-19-vault-s-ui-cached-user-viewed-secrets-between-shared-browser-sessions/28166
https://security.gentoo.org/glsa/202207-01
https://discuss.hashicorp.com/t/hcsec-2021-19-vault-s-ui-cached-user-viewed-secrets-between-shared-browser-sessions/28166
https://security.gentoo.org/glsa/202207-01

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