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CVE-2021-41803

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

7.1 HighFix available

HashiCorp Consul 1.8.1 up to 1.11.8, 1.12.4, and 1.13.1 do not properly validate the node or segment names prior to interpolation and usage in JWT claim assertions with the auto config RPC. Fixed in 1.11.9, 1.12.5, and 1.13.2."

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
Low
Integrity
None
Availability
High

Exploit likelihood

1.07%Up 0.2 points since Sep 23, 2022
90%50%10%1%

What each source reports

NVD Score used 7.1

HashiCorp Consul 1.8.1 up to 1.11.8, 1.12.4, and 1.13.1 do not properly validate the node or segment names prior to interpolation and usage in JWT claim assertions with the auto config RPC. Fixed in 1.11.9, 1.12.5, and 1.13.2."

Record
CVE-2021-41803
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
Weakness
CWE-862
Updated
2026-11-02
CVE List 7.1

HashiCorp Consul 1.8.1 up to 1.11.8, 1.12.4, and 1.13.1 do not properly validate the node or segment names prior to interpolation and usage in JWT claim assertions with the auto config RPC. Fixed in 1.11.9, 1.12.5, and 1.13.2."

Record
CVE-2021-41803
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
Weakness
CWE-862
Updated
2026-11-02
EUVDEUVD-2022-6841 7.1

HashiCorp Consul 1.8.1 up to 1.11.8, 1.12.4, and 1.13.1 do not properly validate the node or segment names prior to interpolation and usage in JWT claim assertions with the auto config RPC. Fixed in 1.11.9, 1.12.5, and 1.13.2."

Record
EUVD-2022-6841
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-hr3v-8cp3-68rf 7.1

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

HashiCorp Consul 1.8.1 up to 1.11.8, 1.12.4, and 1.13.1 did not properly validate the node or segment names prior to interpolation and usage in JWT claim assertions with the auto config RPC. Fixed in 1.11.9, 1.12.5, and 1.13.2.

Record
GHSA-hr3v-8cp3-68rf
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
Weakness
CWE-862
Updated
2026-11-02
OSVALPINE-CVE-2021-41803 7.1

HashiCorp Consul 1.8.1 up to 1.11.8, 1.12.4, and 1.13.1 do not properly validate the node or segment names prior to interpolation and usage in JWT claim assertions with the auto config RPC. Fixed in 1.11.9, 1.12.5, and 1.13.2."

Record
ALPINE-CVE-2021-41803
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
Updated
2026-11-03
OSV 7.1

HashiCorp Consul 1.8.1 up to 1.11.8, 1.12.4, and 1.13.1 do not properly validate the node or segment names prior to interpolation and usage in JWT claim assertions with the auto config RPC. Fixed in 1.11.9, 1.12.5, and 1.13.2."

Record
CVE-2021-41803
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
Updated
2026-11-02
Show 5 moreShow less
OSVDEBIAN-CVE-2021-41803 7.1

HashiCorp Consul 1.8.1 up to 1.11.8, 1.12.4, and 1.13.1 do not properly validate the node or segment names prior to interpolation and usage in JWT claim assertions with the auto config RPC. Fixed in 1.11.9, 1.12.5, and 1.13.2."

Record
DEBIAN-CVE-2021-41803
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
Updated
2026-11-02
OSVGHSA-hr3v-8cp3-68rf 7.1

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

HashiCorp Consul 1.8.1 up to 1.11.8, 1.12.4, and 1.13.1 did not properly validate the node or segment names prior to interpolation and usage in JWT claim assertions with the auto config RPC. Fixed in 1.11.9, 1.12.5, and 1.13.2.

Record
GHSA-hr3v-8cp3-68rf
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
Weakness
CWE-862
Updated
2026-11-02
OSVUBUNTU-CVE-2021-41803 7.1

HashiCorp Consul 1.8.1 up to 1.11.8, 1.12.4, and 1.13.1 do not properly validate the node or segment names prior to interpolation and usage in JWT claim assertions with the auto config RPC. Fixed in 1.11.9, 1.12.5, and 1.13.2."

Record
UBUNTU-CVE-2021-41803
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
Updated
2026-11-02
OSVBIT-consul-2021-41803 No score

HashiCorp Consul 1.8.1 up to 1.11.8, 1.12.4, and 1.13.1 do not properly validate the node or segment names prior to interpolation and usage in JWT claim assertions with the auto config RPC. Fixed in 1.11.9, 1.12.5, and 1.13.2."

Record
BIT-consul-2021-41803
Updated
2026-11-02
OSVGO-2024-2683 No score

Improper handling of node names in JWT claims assertions in github.com/hashicorp/consul

HashiCorp Consul does not properly validate the node or segment names prior to interpolation and usage in JWT claim assertions with the auto config RPC.

Record
GO-2024-2683
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
github.com/hashicorp/consul
Go
 1.8.1 up to 1.11.9
1.11.9
github.com/hashicorp/consul
Go
 1.12.0 up to 1.12.5
1.12.5
github.com/hashicorp/consul
Go
 1.13.0 up to 1.13.2
1.13.2
consul
Alpine:v3.16
 1.8.1 up to 1.12.5-r0
1.12.5-r0
consul
Alpine:v3.17
 1.8.1 up to 1.13.2-r0
1.13.2-r0
consul
Alpine:v3.18
 1.8.1 up to 1.13.2-r0
1.13.2-r0
consul
Bitnami
 1.8.1 up to 1.11.9, 1.12.4 up to 1.12.5, 1.13.1 up to 1.13.2
1.11.91.12.51.13.2
consul
Debian:11
 All versions, plus listed versions
1.10.12+dfsg1-11.8.7+dfsg1-21.8.7+dfsg1-31.8.7+dfsg1-41.8.7+dfsg1-51.8.7+dfsg1-61.9.17+dfsg2-1
 None known
github.com/hashicorp/consul
Go
 1.8.1 up to 1.11.9, 1.12.0 up to 1.12.5, 1.13.0 up to 1.13.2
1.11.91.12.51.13.2
consul
Ubuntu:18.04:LTS
 All versions, plus listed versions
0.6.4~dfsg-3
 None known
consul
Ubuntu:20.04:LTS
 All versions, plus listed versions
1.0.7~dfsg1-5ubuntu11.4.4~dfsg1-2ubuntu21.5.2+dfsg1-61.5.2+dfsg1-101.5.2+dfsg1-121.5.2+dfsg2-14
 None known
consul
Ubuntu:22.04:LTS
 All versions, plus listed versions
1.7.4+dfsg1-11.8.7+dfsg1-3
 None known

History

History
RecordedChangedSources
affected, aliases, referencesOSV
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-41803 is a high vulnerability (CVSS 7.1) in Hashicorp Consul, published September 23, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.07%, the 65th percentile. Fixed in github.com/hashicorp/consul 1.11.9.

References

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