Uncontrolled resource consumption in the Consul Connect authorization endpoint (CVE-2026-19014)
Consul Community Edition and Consul Enterprise versions 1.17.0 through 2.0.2 contain an uncontrolled resource consumption vulnerability in the Connect authorization endpoint. This flaw allows an attacker to increase the agent's intention-match cache size without limit, bypassing the operator's cache-disable settings. The issue is addressed in Consul 2.0.3 and later versions of Consul Enterprise including 1.21.17, 1.22.11, and 2.0.3.
AI Analysis
Technical Summary
CVE-2026-19014 describes an uncontrolled resource consumption vulnerability affecting Consul Community Edition and Consul Enterprise from versions 1.17.0 up to but not including 2.0.3. The vulnerability exists in the Connect authorization endpoint, where a caller can cause the agent's intention-match cache to grow without bounds, effectively defeating any cache-disable configuration set by the operator. This can lead to resource exhaustion on the affected system. The vulnerability has been fixed in Consul 2.0.3 and Consul Enterprise versions 1.21.17, 1.22.11, and 2.0.3.
Potential Impact
An attacker can cause the Consul agent to consume excessive resources by forcing unbounded growth of the intention-match cache. This may degrade system performance or availability due to resource exhaustion. The vulnerability bypasses operator-configured cache-disable settings, making mitigation via configuration ineffective without applying the fix.
Mitigation Recommendations
A patch is available and should be applied. Upgrade affected Consul Community Edition versions to 2.0.3 or later. For Consul Enterprise, upgrade to versions 1.21.17, 1.22.11, or 2.0.3 or later. No alternative mitigations are indicated, as the vulnerability bypasses cache-disable configurations.
Uncontrolled resource consumption in the Consul Connect authorization endpoint (CVE-2026-19014)
Description
Consul Community Edition and Consul Enterprise versions 1.17.0 through 2.0.2 contain an uncontrolled resource consumption vulnerability in the Connect authorization endpoint. This flaw allows an attacker to increase the agent's intention-match cache size without limit, bypassing the operator's cache-disable settings. The issue is addressed in Consul 2.0.3 and later versions of Consul Enterprise including 1.21.17, 1.22.11, and 2.0.3.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-19014 describes an uncontrolled resource consumption vulnerability affecting Consul Community Edition and Consul Enterprise from versions 1.17.0 up to but not including 2.0.3. The vulnerability exists in the Connect authorization endpoint, where a caller can cause the agent's intention-match cache to grow without bounds, effectively defeating any cache-disable configuration set by the operator. This can lead to resource exhaustion on the affected system. The vulnerability has been fixed in Consul 2.0.3 and Consul Enterprise versions 1.21.17, 1.22.11, and 2.0.3.
Potential Impact
An attacker can cause the Consul agent to consume excessive resources by forcing unbounded growth of the intention-match cache. This may degrade system performance or availability due to resource exhaustion. The vulnerability bypasses operator-configured cache-disable settings, making mitigation via configuration ineffective without applying the fix.
Mitigation Recommendations
A patch is available and should be applied. Upgrade affected Consul Community Edition versions to 2.0.3 or later. For Consul Enterprise, upgrade to versions 1.21.17, 1.22.11, or 2.0.3 or later. No alternative mitigations are indicated, as the vulnerability bypasses cache-disable configurations.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- BIT-consul-2026-19014
- Osv Schema Version
- 1.6.2
- Aliases
- ["CVE-2026-19014"]
- Ecosystems
- ["Bitnami"]
- Database Specific Severity
- Medium
- Cvss Version
- null
Threat ID: 6a8c4c6dacd9273b499c0a3b
Added to database: 08/24/2026, 13:51:41 UTC
Last enriched: 08/24/2026, 14:25:08 UTC
Last updated: 08/24/2026, 22:52:09 UTC
Views: 2
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