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CVE-2021-41803

24
FAUCET Score

CVE-2021-41803 is a vulnerability in HashiCorp Consul versions 1.8.1 through 1.11.8, 1.12.4, and 1.13.1, where improper validation of node or segment names can lead to issues during JWT claim assertions with the auto config RPC. This vulnerability has a CVSS score of 7.1 (High), indicating a low attack complexity and requiring low privileges, with potential for partial confidentiality impact and high availability impact. There is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.8.1, < 1.11.9CPE matchmatch criteria
cpe:2.3:a:hashicorp:consul:*:*:*:*:-:*:*:*
>= 1.8.1, < 1.11.9CPE matchmatch criteria
cpe:2.3:a:hashicorp:consul:*:*:*:*:enterprise:*:*:*
1.12.4CPE matchmatch criteria
cpe:2.3:a:hashicorp:consul:1.12.4:*:*:*:-:*:*:*
1.12.4CPE matchmatch criteria
cpe:2.3:a:hashicorp:consul:1.12.4:*:*:*:enterprise:*:*:*
1.13.1CPE matchmatch criteria
cpe:2.3:a:hashicorp:consul:1.13.1:*:*:*:-:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.1HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
4.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.88%
Probability of exploitation in next 30 days
EPSS Percentile
55.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0088 is in the 50th percentile among its peer group of 17,823 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (8)

gopatch availablevia ghsa
Product: github.com/hashicorp/consulFixed in: 1.11.9
gopatch availablevia ghsa
Product: github.com/hashicorp/consulFixed in: 1.12.5
gopatch availablevia ghsa
Product: github.com/hashicorp/consulFixed in: 1.13.2
redhatno patchvia redhat_api
Product: Red Hat OpenShift Dev SpacesFixed in: devspaces/traefik-rhel8
redhatno patchvia redhat_api
Product: Red Hat Openshift Data Foundation 4Fixed in: odf4/odr-rhel8-operator
redhatend of lifevia redhat_api
Product: Red Hat Openshift Data Foundation 4Fixed in: odf4/odf-multicluster-rhel9-operator
redhatend of lifevia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: openshift4/ose-grafana
redhatend of lifevia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: openshift4/topology-aware-lifecycle-manager-rhel8-operator

Vendor Advisories (2)

goGHSA-hr3v-8cp3-68rfhigh

HashiCorp Consul does not properly validate node or segment names prior to usage in JWT claim assertions

Sep 25, 2022
redhatCVE-2021-41803Moderate

consul: Consul Auto-Config JWT Authorization Missing Input Validation

Sep 23, 2022

References

discuss.hashicorp.com / t/hcsec-2022-19-consul-auto-config-jwt-authorization-missing-input-validation/44627
Vendor Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/LYZOKMMVX4SIEHPJW3SJUQGMO5YZCPHC
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/XNF4OLYZRQE75EB5TW5N42FSXHBXGWFE
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/ZTE4ITXXPIWZEQ4HYQCB6N6GZIMWXDAI
hashicorp.com / blog/category/consul
Vendor Advisory