CVE-2026-2808: Consul vulnerable to arbitrary file reads through the vault kubernetes authentication provider

Published Mar 11, 2026
·
Updated

HashiCorp Consul and Consul Enterprise 1.18.20 up to 1.21.10 and 1.22.4 are vulnerable to arbitrary file read when configured with Kubernetes authentication. This vulnerability, CVE-2026-2808, is fixed in Consul 1.18.21, 1.21.11 and 1.22.5.

Affected Software

5 affected componentsFixes available
HashiCorp Consul>=1.18.20<1.21.10, <1.22.4
HashiCorp Consul Enterprise>=1.18.20<1.21.10, <1.22.4
go/github.com/hashicorp/consul>=1.19.0<1.21.11
1.21.11
go/github.com/hashicorp/consul>=1.22.0-rc1<1.22.5
1.22.5
go/github.com/hashicorp/consul<1.18.21
1.18.21

Event History

Mar 11, 2026
CVE Published
via MITRE·11:08 PM
Data Sourced
via MITRE·11:08 PM
DescriptionSeverityWeakness
Mar 12, 2026
Data Sourced
via NVD·12:16 AM
DescriptionSeverityWeakness
Advisory Published
via GitHub·12:31 AM
Data Sourced
via GitHub·12:31 AM
DescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2026-2808?

CVE-2026-2808 has been assigned a significant severity rating due to its potential for arbitrary file reading through Kubernetes authentication.

2

How do I fix CVE-2026-2808?

To fix CVE-2026-2808, upgrade HashiCorp Consul or Consul Enterprise to a version later than 1.21.10 or 1.22.4.

3

Which versions of HashiCorp Consul are affected by CVE-2026-2808?

HashiCorp Consul versions 1.18.20 to 1.21.10 and below 1.22.4 are affected by CVE-2026-2808.

4

What types of systems are impacted by CVE-2026-2808?

CVE-2026-2808 impacts installations of HashiCorp Consul and Consul Enterprise utilizing Kubernetes authentication.

5

Is CVE-2026-2808 an easily exploitable vulnerability?

CVE-2026-2808 can be considered easily exploitable as it allows arbitrary file reads if the system is misconfigured.

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