Skip to content
Fencer Vulns
high 8.8

CVE-2021-37219 json

HashiCorp Consul Privilege Escalation Vulnerability

published 2021-09-07 5 y ago modified 2026-09-10 1 mo ago also BIT-consul-2021-37219 , EUVD-2021-2037 , GHSA-ccw8-7688-vqx4 , GO-2022-0593

cvss
8.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 67%
public exploits
0
none known

Summary

HashiCorp Consul and Consul Enterprise 1.10.1 Raft RPC layer allows non-server agents with a valid certificate signed by the same CA to access server-only functionality, enabling privilege escalation. Fixed in 1.8.15, 1.9.9 and 1.10.2.

Patch / fix

  • go github.com/hashicorp/consul 1.8.15, 1.9.9, 1.10.2
  • bitnami consul 1.8.15, 1.9.9, 1.10.2
  • hashicorp consul 1.8.15, 1.9.9, 1.10.2
  • consul Arch Linux 1.10.2-1

arch linux advisories AVG-2360

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-2021-37219 updated cvss 8.8

consul: RPC layer allows non-server agents to access server-only functionality

  • Red Hat OpenShift Service Mesh 1 consul Red Hat OpenShift Service Mesh 2.0 consul Red Hat Advanced Cluster Management for Kubernetes 2 consul
    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

1.15% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
GitHub 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.5 AV:N/AC:L/Au:S/C:P/I:P/A:P
OSV 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
go github.com/hashicorp/consul
>=1.10.1, <1.10.2
>=1.9.0, <1.9.9
<1.8.15
1.10.2
1.9.9
1.8.15
bitnami consul
<1.8.15
>=1.9.0, <1.9.9
>=1.10.0, <1.10.2
1.8.15
1.9.9
1.10.2

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.