---
id: CVE-2021-38554
title: >-
  vault: UI erroneously cached and exposed user-viewed secrets between sessions
  in a single shared browser (CVE-2021-38554)
summary: >-
  A flaw was found in the vault package. The Vault UI web application may fail
  to completely clear a client-side data cache on user logout. As a result, an
  authenticated user sharing a browser to access Vault may have been able to
  view the p…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N'
cvssSource: vendor
cwe: CWE-200
vendor: Red Hat
product: Red Hat Openshift Container Storage 4
affected:
  - openshift_container_platform 4
  - openshift_container_storage 4
patched:
  - github.com/hashicorp/vault 1.6.6
  - github.com/hashicorp/vault 1.7.4
published: '2021-08-13'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T14:02:21+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-38554.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-38554.json
  - url: 'https://access.redhat.com/security/cve/CVE-2021-38554'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=1995207'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2021-38554'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2021-38554'
  - url: >-
      https://discuss.hashicorp.com/t/hcsec-2021-19-vault-s-ui-cached-user-viewed-secrets-between-shared-browser-sessions/28166
  - url: 'https://github.com/hashicorp/vault'
  - url: 'https://github.com/hashicorp/vault/releases/tag/v1.6.6'
  - url: 'https://github.com/hashicorp/vault/releases/tag/v1.7.4'
  - url: 'https://security.gentoo.org/glsa/202207-01'
tags:
  - csaf
  - vex
  - red-hat
  - osv
  - go
epss: 0.00911
epssPercentile: 0.58478
aliases:
  - GHSA-6239-28c2-9mrm
  - BIT-vault-2021-38554
  - GO-2022-0632
ecosystem: go
ingestedAt: '2026-09-12T03:13:01.757Z'
---

## Overview

A flaw was found in the vault package. The Vault UI web application may fail to completely clear a client-side data cache on user logout. As a result, an authenticated user sharing a browser to access Vault may have been able to view the previous authenticated user’s cached secrets, even if they were not authorized by Vault policies to view them.

## Vendor advisories

- **Red Hat VEX** · Low · affected: Red Hat OpenShift Container Platform 4, Red Hat Openshift Container Storage 4 · no fix planned: Red Hat Openshift Container Storage 4, Red Hat OpenShift Container Platform 4 · updated 2026-09-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-38554.json)

**vault: UI erroneously cached and exposed user-viewed secrets between sessions in a single shared browser** — rated Low by Red Hat. Released 2021-08-13, updated 2026-09-17.

Affected:

- Red Hat OpenShift Container Platform 4
- Red Hat Openshift Container Storage 4

No fix planned:

- Red Hat Openshift Container Storage 4
- Red Hat OpenShift Container Platform 4

Not affected:

- Logging Subsystem for Red Hat OpenShift
- OpenShift Service Mesh 2.0
- Red Hat Advanced Cluster Management for Kubernetes 2
- Red Hat Openshift Data Foundation 4

## Remediation

Out of support scope

## Package advisory (CVE-2021-38554)

Affected packages:

- `github.com/hashicorp/vault < 1.6.6`
- `github.com/hashicorp/vault >= 1.7.0, < 1.7.4`

Patched in:

- `github.com/hashicorp/vault 1.6.6`
- `github.com/hashicorp/vault 1.7.4`

Source: https://osv.dev/vulnerability/GHSA-6239-28c2-9mrm