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Back to active CVEs
High · CVSS 8.3CVE-2026-87090

Consul vulnerable to an authorization bypass in the catalog node-write pathCVE-2026-87090

Answer in brief

CVE-2026-87090 records a High severity (CVSS 8.3) vulnerability in Consul vulnerable to an authorization bypass in the catalog node-write path. The current sources do not mark it as known exploited. The current feed maps HashiCorp/Consul (generic), HashiCorp/Consul Enterprise (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 10, 2026Updated Sep 10, 2026Source checked Oct 25, 2026First seen by HOL Sep 10, 2026Material review Sep 10, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.3
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 8.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps HashiCorp/Consul (generic), HashiCorp/Consul Enterprise (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
HashiCorp/Consulgeneric>=0.1.0 <2.0.42.0.4
HashiCorp/Consul Enterprisegeneric>=0.1.0 <2.0.42.0.4

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for HashiCorp/Consul, HashiCorp/Consul Enterprise.
  2. 2Review the reported fix. Update HashiCorp/Consul to 2.0.4; HashiCorp/Consul Enterprise to 2.0.4 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Sep 10, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 10, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 10, 2026

Sources and claim methodology

  • Source referencediscuss.hashicorp.com
Upstream source description

Consul and Consul Enterprise are vulnerable to an authorization bypass in the catalog node-write path that may allow an authenticated attacker to delete another node's catalog registration and take over its node identity. An attacker with a token granting node-write permission on any single node name may exploit this issue if they can obtain the node ID of a node they do not control. This vulnerability (CVE-2026-87090) is fixed in Consul 2.0.4 and Consul Enterprise 1.21.18, 1.22.12 and 2.0.4.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Loading a through relationship with a limit of 1 in Ash ignores the through path and returns unrelated destination recordsAlso CWE-863
  • AshPostgres ignores attribute multitenancy on the join resource when loading many_to_many and through relationships, returning records related through other tenants' rowsAlso CWE-863
  • AshPostgres returns another tenant's record for a skipped upsert when return_skipped_upsert? is setAlso CWE-863

Record context

Vulnerability class
Secret Exfiltration
EPSS
Not reported
CWE IDs
CWE-863
Source
CVE List V5
Source checked
Oct 25, 2026
References
1 linked source
Open source record