CVE-2026-19012: CWE-476: NULL Pointer Dereference in HashiCorp Consul
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.
AI Analysis
Technical Summary
CVE-2026-19012 is a NULL pointer dereference vulnerability in HashiCorp Consul affecting versions 1.18.0 through 2.0.2. An authenticated user with config-entry write permissions can submit a malicious service-router configuration entry that triggers the agent to crash, resulting in a denial of service. This vulnerability exists in the downgrade path from Enterprise to Community Edition. The flaw is fixed in Consul 2.0.3 and Enterprise versions 1.21.17, 1.22.11, and 2.0.3.
Potential Impact
An authorized caller with config-entry write permission can cause the Consul server to crash, resulting in denial of service. There is no impact on confidentiality or integrity. The vulnerability requires authentication and elevated permissions, limiting the attack surface.
Mitigation Recommendations
Upgrade affected Consul Community Edition versions to 2.0.3 or later. For Enterprise Edition, upgrade to versions 1.21.17, 1.22.11, or 2.0.3 or later. No other mitigation or workaround is indicated. Patch status is confirmed fixed in these versions.
CVE-2026-19012: CWE-476: NULL Pointer Dereference in HashiCorp Consul
Description
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.
CVSS v3.1
Score 5.3medium
Affected software
HashiCorp
Consul
HashiCorp
Consul Enterprise
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-2026-19012 is a NULL pointer dereference vulnerability in HashiCorp Consul affecting versions 1.18.0 through 2.0.2. An authenticated user with config-entry write permissions can submit a malicious service-router configuration entry that triggers the agent to crash, resulting in a denial of service. This vulnerability exists in the downgrade path from Enterprise to Community Edition. The flaw is fixed in Consul 2.0.3 and Enterprise versions 1.21.17, 1.22.11, and 2.0.3.
Potential Impact
An authorized caller with config-entry write permission can cause the Consul server to crash, resulting in denial of service. There is no impact on confidentiality or integrity. The vulnerability requires authentication and elevated permissions, limiting the attack surface.
Mitigation Recommendations
Upgrade affected Consul Community Edition versions to 2.0.3 or later. For Enterprise Edition, upgrade to versions 1.21.17, 1.22.11, or 2.0.3 or later. No other mitigation or workaround is indicated. Patch status is confirmed fixed in these versions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- HashiCorp
- Date Reserved
- 2026-08-05T20:21:09.285Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a763509bf8831d5390b0147
Added to database: 08/07/2026, 19:42:01 UTC
Last enriched: 08/15/2026, 15:13:54 UTC
Last updated: 09/21/2026, 22:01:32 UTC
Views: 46
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.