CVE-2021-27400
HashiCorp Vault and Vault Enterprise Cassandra integrations (storage backend and database secrets...
HashiCorp Vault and Vault Enterprise Cassandra integrations (storage backend and database secrets engine plugin) did not validate TLS certificates when connecting to Cassandra clusters. Fixed in 1.6.4 and 1.7.1
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
HashiCorp Vault and Vault Enterprise Cassandra integrations (storage backend and database secrets engine plugin) did not validate TLS certificates when connecting to Cassandra clusters. Fixed in 1.6.4 and 1.7.1
- Record
CVE-2021-27400- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:P/A:N - Weakness
- CWE-295
- Updated
- 2026-11-02
CVE List No score
HashiCorp Vault and Vault Enterprise Cassandra integrations (storage backend and database secrets engine plugin) did not validate TLS certificates when connecting to Cassandra clusters. Fixed in 1.6.4 and 1.7.1
- Record
CVE-2021-27400- Updated
- 2026-11-02
EUVDEUVD-2021-14155 No score
HashiCorp Vault and Vault Enterprise Cassandra integrations (storage backend and database secrets engine plugin) did not validate TLS certificates when connecting to Cassandra clusters. Fixed in 1.6.4 and 1.7.1
- Record
EUVD-2021-14155- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-4wr6-x9g6-m47v No score
HashiCorp Vault and Vault Enterprise Cassandra integrations (storage backend and database secrets...
HashiCorp Vault and Vault Enterprise Cassandra integrations (storage backend and database secrets engine plugin) did not validate TLS certificates when connecting to Cassandra clusters. Fixed in 1.6.4 and 1.7.1
- Record
GHSA-4wr6-x9g6-m47v- Weakness
- CWE-295
- Updated
- 2026-11-02
OSVALPINE-CVE-2021-27400
HashiCorp Vault and Vault Enterprise Cassandra integrations (storage backend and database secrets engine plugin) did not validate TLS certificates when connecting to Cassandra clusters. Fixed in 1.6.4 and 1.7.1
- Record
ALPINE-CVE-2021-27400- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Updated
- 2026-11-03
OSV
HashiCorp Vault and Vault Enterprise Cassandra integrations (storage backend and database secrets engine plugin) did not validate TLS certificates when connecting to Cassandra clusters. Fixed in 1.6.4 and 1.7.1
- Record
CVE-2021-27400- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
OSVBIT-vault-2021-27400 No score
HashiCorp Vault and Vault Enterprise Cassandra integrations (storage backend and database secrets engine plugin) did not validate TLS certificates when connecting to Cassandra clusters. Fixed in 1.6.4 and 1.7.1
- Record
BIT-vault-2021-27400- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
vaultAlpine:v3.14 |
1.7.0 up to 1.7.1-r0 | 1.7.1-r0 |
vaultAlpine:v3.15 |
1.7.0 up to 1.7.1-r0 | 1.7.1-r0 |
vaultAlpine:v3.16 |
1.7.0 up to 1.7.1-r0 | 1.7.1-r0 |
vaultAlpine:v3.17 |
1.7.0 up to 1.7.1-r0 | 1.7.1-r0 |
vaultAlpine:v3.18 |
1.7.0 up to 1.7.1-r0 | 1.7.1-r0 |
vaultBitnami |
before 1.6.4, 1.7.0 up to 1.7.1 | 1.6.41.7.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, aliases, references | OSV | |
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-27400 is a high vulnerability (CVSS 7.5) in Hashicorp Vault, published April 22, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.57%, the 47th percentile. Fixed in vault 1.7.1-r0.