CVE-2026-87107: CWE-863: Incorrect Authorization in HashiCorp Consul
HashiCorp Consul and Consul Enterprise have an authorization bypass vulnerability (CVE-2026-87107) in the catalog deregistration path. This flaw allows a local ACL token with service:write or node:write permissions to delete services, checks, or nodes imported from a peered cluster without proper authority over the peer origin. The issue is fixed in Consul 2.0.4 and Consul Enterprise versions 1.21.18, 1.22.12, and 2.0.4.
AI Analysis
Technical Summary
CVE-2026-87107 is an authorization bypass vulnerability in HashiCorp Consul and Consul Enterprise affecting the catalog deregistration path. A local ACL token possessing service:write or node:write permissions can exploit this flaw to remove catalog objects (services, checks, nodes) imported from a peered cluster, even without having authority over the peer origin. This improper authorization is classified under CWE-863. The vulnerability is addressed in Consul 2.0.4 and Consul Enterprise 1.21.18, 1.22.12, and 2.0.4.
Potential Impact
An attacker with local ACL tokens having service:write or node:write permissions can delete peer-imported catalog objects without proper authorization, potentially disrupting service discovery and cluster operations. The vulnerability does not impact confidentiality but can affect integrity and availability of the catalog data.
Mitigation Recommendations
Apply the official fixes by upgrading to Consul 2.0.4 or Consul Enterprise 1.21.18, 1.22.12, or 2.0.4. These versions contain the patch that corrects the authorization bypass in the catalog deregistration path.
CVE-2026-87107: CWE-863: Incorrect Authorization in HashiCorp Consul
Description
HashiCorp Consul and Consul Enterprise have an authorization bypass vulnerability (CVE-2026-87107) in the catalog deregistration path. This flaw allows a local ACL token with service:write or node:write permissions to delete services, checks, or nodes imported from a peered cluster without proper authority over the peer origin. The issue is fixed in Consul 2.0.4 and Consul Enterprise versions 1.21.18, 1.22.12, and 2.0.4.
CVSS v3.1
Score 5.4medium
Affected software
HashiCorp
Consul
HashiCorp
Consul Enterprise
pkg:github/Consul EnterpriseRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-87107 is an authorization bypass vulnerability in HashiCorp Consul and Consul Enterprise affecting the catalog deregistration path. A local ACL token possessing service:write or node:write permissions can exploit this flaw to remove catalog objects (services, checks, nodes) imported from a peered cluster, even without having authority over the peer origin. This improper authorization is classified under CWE-863. The vulnerability is addressed in Consul 2.0.4 and Consul Enterprise 1.21.18, 1.22.12, and 2.0.4.
Potential Impact
An attacker with local ACL tokens having service:write or node:write permissions can delete peer-imported catalog objects without proper authorization, potentially disrupting service discovery and cluster operations. The vulnerability does not impact confidentiality but can affect integrity and availability of the catalog data.
Mitigation Recommendations
Apply the official fixes by upgrading to Consul 2.0.4 or Consul Enterprise 1.21.18, 1.22.12, or 2.0.4. These versions contain the patch that corrects the authorization bypass in the catalog deregistration path.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- HashiCorp
- Date Reserved
- 2026-09-08T20:24:18.555Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aa3023cd29482f9ab044ada
Added to database: 09/10/2026, 19:17:16 UTC
Last enriched: 09/10/2026, 19:21:04 UTC
Last updated: 09/10/2026, 19:26:01 UTC
Views: 6
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.