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Description
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.
Basic information
Type
reviewed
Severity
medium Advisory on GitHub
Open advisory ↗ Repository advisory
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Source code
Browse source ↗ Published (advisory)
2026-03-12 00:31:17 UTC
Updated
2026-03-24 21:03:59 UTC
GitHub reviewed
2026-03-12 17:34:04 UTC
NVD published
2026-03-11
EPSS Score
Score
Percentile
0.03%
7.11%
CVSS Scores
Base score
Version
Severity
Vector
6.8
3.1
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CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
CWEs
CWE id
Name
CWE-59
Improper Link Resolution Before File Access ('Link Following')
Affected packages (3)
Vulnerable version ranges and first patched releases as published by GitHub.
Ecosystem
Package
Vulnerable range
First patched
Vulnerable functions
go
github.com/hashicorp/consul < 1.18.21
1.18.21
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go
github.com/hashicorp/consul >= 1.22.0-rc1, < 1.22.5
1.22.5
—
go
github.com/hashicorp/consul >= 1.19.0, < 1.21.11
1.21.11
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cvelogic
Threat Intelligence