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Advisory severityMedium4.2Red Hat Linux

Medium [CVE-2026-15970] Authorization bypass via custom public listener

This medium-severity Red Hat Linux advisory covers CVE-2026-15970.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-15970 Source published Source updated

VulniPulse record published Record updated

CVE-2026-15970
Affected products & platforms
Red Hat LinuxUnclassified
Open source advisory

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Summary

Consul Community Edition and Consul Enterprise 1.20.1 through 2.0.2 are vulnerable to an L7 intention authorization bypass when a service proxy is configured with a custom public listener. An authenticated mesh workload may reach HTTP paths that are blocked by a path-based deny intention.

This vulnerability, CVE-2026-15970, is fixed in Consul 2.0.3 and Consul Enterprise 1.21.17, 1.22.11, and 2.0.3. A flaw was found in Consul.

When a service proxy is configured with a custom public listener, an authenticated user within the mesh network can bypass Layer 7 (L7) authorization intentions. This allows the user to access HTTP paths that should be blocked, potentially leading to unauthorized information disclosure or actions.

Red Hat severity: Moderate — CVSS 4.2 (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N). Weakness: CWE-551.

Affected versions
  • 1.20.1
  • 2.0.2

Official advisory · high-confidence parse· fetched 13 hours ago·verify at source

Fixed versions
  • 2.0.3
  • 1.21.17
  • 1.22.11

Official advisory · high-confidence parse· fetched 13 hours ago·verify at source

Mitigation

Upgrade to a fixed release: 2.0.3, 1.21.17, 1.22.11. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 13 hours ago·verify at source

Discussion(0)

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