Medium severity · published Aug 7, 2026
CVE-2026-19012
Authenticated denial of service in Consul Enterprise-to-Community Edition downgrade path
5.3
CVSS
0.3%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 26% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CO
Consul · HashiCorp
1.18.0 before 2.0.3 · source: vendor
CE
Consul Enterprise · HashiCorp
1.18.0 before 2.0.3 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-19012
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-19012
discuss.hashicorp.com
https://discuss.hashicorp.com/t/hcsec-2026-25-multiple-vulnerabilities-impacting-hashicorp-consul/77629
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