Medium [CVE-2026-19012] Authenticated denial of service via configuration entry
This medium-severity Red Hat Linux advisory covers CVE-2026-19012 affecting Red Hat Enterprise Linux 8, Red Hat package: grafana.
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Summary
Consul Community Edition and Consul Enterprise 1.18.0 through 2.0.2 are vulnerable to an authenticated denial of service in the Enterprise-to-Community Edition downgrade path that may allow an authorized caller to crash the Consul server.
A caller with config-entry write permission can submit a service-router configuration entry that causes the agent to exit unexpectedly. This vulnerability, CVE-2026-19012, 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. An authenticated attacker with config-entry write permission can exploit a vulnerability in the Enterprise-to-Community Edition downgrade path.
Red Hat severity: Moderate — CVSS 5.3 (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-15.
Affected Red Hat products: Red Hat Enterprise Linux 8. Red Hat does not currently list a fixing RHSA for this CVE.
Affected products named by the advisory: Red Hat package: grafana.
- 1.18.0
- 2.0.2
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
- 2.0.3
- 1.21.17
- 1.22.11
Official advisory · high-confidence parse· fetched 2 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 2 hours ago·verify at source
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