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Fencer Vulns
high 7.5

CVE-2021-27400 json

HashiCorp Vault and Vault Enterprise Cassandra integrations (storage backend and database secrets engine plugin) did not validate TLS certi…

published 2021-04-22 5 y ago modified 2026-09-08 2 mo ago also BIT-vault-2021-27400 , EUVD-2021-14155

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 47%
public exploits
0
none known

Summary

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

Patch / fix

  • bitnami vault 1.6.4, 1.7.1
  • hashicorp vault 1.6.4, 1.7.1
  • vault Alpine 3.18, Alpine 3.17, Alpine 3.16 +2 more 1.7.1-r0

alpine advisories ALPINE-CVE-2021-27400

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • vault Arch Linux 1.7.1-2

arch linux advisories AVG-1860

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-27400 updated cvss 7.5

vault: TLS certificates not validated when connecting to Cassandra clusters

  • Red Hat Logging Subsystem for Red Hat OpenShift openshift-logging/logging-loki-rhel8 Red Hat OpenShift Service Mesh 1 servicemesh, servicemesh-mixc, servicemesh-mixs, servicemesh-galley, servicemesh-citadel, servicemesh-istioctl, +3 more Red Hat OpenShift Service Mesh 2.0 servicemesh, servicemesh-mixc, servicemesh-mixs, servicemesh-istioctl, servicemesh-pilot-agent, servicemesh-pilot-discovery Red Hat Advanced Cluster Management for Kubernetes 2 vault Red Hat OpenShift Container Platform 4 openshift4/ose-installer, openshift4/topology-aware-lifecycle-manager-rhel8-operator Red Hat Openshift Container Storage 4 ocs4/cephcsi-rhel8, ocs4/mcg-rhel8-operator, ocs4/ocs-rhel8-operator, ocs4/rook-ceph-rhel8-operator
    +1 more products
    Red Hat Openshift Data Foundation 4 odf4/cephcsi-rhel9, odf4/mcg-rhel9-operator, odf4/ocs-rhel9-operator, odf4/odf-rhel8-operator, odf4/odr-rhel8-operator, odf4/rook-ceph-rhel8-operator, +1 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.57% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected packages

ecosystem package affected fixed in
bitnami vault
<1.6.4
>=1.7.0, <1.7.1
1.6.4
1.7.1

Classification

Weakness
  • CWE-295 Improper Certificate Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.