CVE-2026-19015: CWE-770: Allocation of Resources Without Limits or Throttling in HashiCorp Consul
HashiCorp Consul versions 1.2.0 through 2.0.2 contain a vulnerability in the Connect CA roots endpoint that allows uncontrolled resource consumption by growing the agent's Connect CA roots cache without limits. This issue bypasses the operator's cache-disable configuration. The vulnerability is fixed in Consul 2.0.3 and specific enterprise versions.
AI Analysis
Technical Summary
CVE-2026-19015 is a resource consumption vulnerability (CWE-770) affecting HashiCorp Consul Community Edition and Enterprise versions 1.2.0 through 2.0.2. The flaw exists in the Connect CA roots endpoint, where a remote unauthenticated attacker can cause the agent's Connect CA roots cache to grow without bound, ignoring cache-disable settings. This can lead to denial of service due to resource exhaustion. The issue is resolved in Consul 2.0.3 and Enterprise versions 1.21.17, 1.22.11, and 2.0.3.
Potential Impact
An unauthenticated remote attacker can cause the Consul agent to consume excessive resources by forcing unbounded growth of the Connect CA roots cache. This can result in denial of service conditions due to resource exhaustion. There is no impact on confidentiality or integrity according to the CVSS vector.
Mitigation Recommendations
A fix is available and users should upgrade to Consul 2.0.3 or the specified Enterprise versions (1.21.17, 1.22.11, 2.0.3) to remediate this vulnerability. Patch status is confirmed by the vendor advisory. Until patched, operators should be aware that disabling the cache does not prevent this resource consumption issue.
CVE-2026-19015: CWE-770: Allocation of Resources Without Limits or Throttling in HashiCorp Consul
Description
HashiCorp Consul versions 1.2.0 through 2.0.2 contain a vulnerability in the Connect CA roots endpoint that allows uncontrolled resource consumption by growing the agent's Connect CA roots cache without limits. This issue bypasses the operator's cache-disable configuration. The vulnerability is fixed in Consul 2.0.3 and specific enterprise versions.
CVSS v3.1
Score 5.3medium
Affected software
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-2026-19015 is a resource consumption vulnerability (CWE-770) affecting HashiCorp Consul Community Edition and Enterprise versions 1.2.0 through 2.0.2. The flaw exists in the Connect CA roots endpoint, where a remote unauthenticated attacker can cause the agent's Connect CA roots cache to grow without bound, ignoring cache-disable settings. This can lead to denial of service due to resource exhaustion. The issue is resolved in Consul 2.0.3 and Enterprise versions 1.21.17, 1.22.11, and 2.0.3.
Potential Impact
An unauthenticated remote attacker can cause the Consul agent to consume excessive resources by forcing unbounded growth of the Connect CA roots cache. This can result in denial of service conditions due to resource exhaustion. There is no impact on confidentiality or integrity according to the CVSS vector.
Mitigation Recommendations
A fix is available and users should upgrade to Consul 2.0.3 or the specified Enterprise versions (1.21.17, 1.22.11, 2.0.3) to remediate this vulnerability. Patch status is confirmed by the vendor advisory. Until patched, operators should be aware that disabling the cache does not prevent this resource consumption issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- HashiCorp
- Date Reserved
- 2026-08-05T20:21:29.431Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a763509bf8831d5390b014d
Added to database: 08/07/2026, 19:42:01 UTC
Last enriched: 08/07/2026, 20:00:52 UTC
Last updated: 08/07/2026, 20:00:52 UTC
Views: 2
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