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CVE-2026-87107

Consul vulnerable to an authorization bypass in the catalog deregistration path

MEDIUM
5.4
CVSS Score
Published: September 10, 2026 at 06:57 PM UTC
Updated: September 10, 2026 at 08:17 PM UTC
1 product affected across 1 vendorConsul

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Severity
MEDIUM5.4
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

Consul and Consul Enterprise are vulnerable to an authorization bypass in the catalog deregistration path that may allow a local ACL token to delete peer-imported catalog objects. A caller with {{service:write}} or {{node:write}} permission may exploit this issue to remove services, checks, or nodes imported from a peered cluster without holding authority over the peer origin. This vulnerability (CVE-2026-87107) is fixed in Consul 2.0.4 and Consul Enterprise 1.21.18, 1.22.12 and 2.0.4.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Consul· Hashicorp
60%
1.21.0 ≤ v < 2.0.41.21.0
Affected range stops below 2.0.4, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: cverecord
https://discuss.hashicorp.com/t/hcsec-2026-36-consul-vulnerable-to-an-authorization-bypass-in-the-catalog-deregistration-path/77738

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.4MEDIUMHashiCorp
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-863

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