CVE-2026-2808: CWE-59: Improper Link Resolution Before File Access (Link Following) in HashiCorp Consul
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.
AI Analysis
Technical Summary
HashiCorp Consul versions 1.18.20 through 1.21.10 and 1.22.4 contain a CWE-59 vulnerability involving improper link resolution before file access when configured with Kubernetes authentication. This flaw allows an attacker with high privileges to read arbitrary files, potentially exposing sensitive information. The vulnerability is addressed in Consul versions 1.18.21, 1.21.11, and 1.22.5.
Potential Impact
Successful exploitation can lead to unauthorized disclosure of sensitive files due to arbitrary file read capability. The confidentiality impact is high, but integrity and availability are not affected. The vulnerability requires high privileges and no user interaction is needed. There are no reports of active exploitation.
Mitigation Recommendations
Upgrade affected HashiCorp Consul versions to 1.18.21, 1.21.11, or 1.22.5 where the vulnerability is fixed. Since this is an official fix provided by the vendor, applying the update is the recommended remediation. No additional mitigation is indicated by the vendor advisory.
CVE-2026-2808: CWE-59: Improper Link Resolution Before File Access (Link Following) in HashiCorp Consul
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
HashiCorp Consul versions 1.18.20 through 1.21.10 and 1.22.4 contain a CWE-59 vulnerability involving improper link resolution before file access when configured with Kubernetes authentication. This flaw allows an attacker with high privileges to read arbitrary files, potentially exposing sensitive information. The vulnerability is addressed in Consul versions 1.18.21, 1.21.11, and 1.22.5.
Potential Impact
Successful exploitation can lead to unauthorized disclosure of sensitive files due to arbitrary file read capability. The confidentiality impact is high, but integrity and availability are not affected. The vulnerability requires high privileges and no user interaction is needed. There are no reports of active exploitation.
Mitigation Recommendations
Upgrade affected HashiCorp Consul versions to 1.18.21, 1.21.11, or 1.22.5 where the vulnerability is fixed. Since this is an official fix provided by the vendor, applying the update is the recommended remediation. No additional mitigation is indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- HashiCorp
- Date Reserved
- 2026-02-19T15:17:24.550Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69b1faec2f860ef94395a3ac
Added to database: 3/11/2026, 11:29:48 PM
Last enriched: 4/18/2026, 1:46:21 PM
Last updated: 4/25/2026, 1:44:30 PM
Views: 134
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