CVE-2026-19015: HashiCorp Consul · Unthrottled Resource Allocation
Affects HashiCorp ConsulSource CVE Database V5
Not known to be exploited · CVSS 5.3 Medium : upgrade to 2.0.3 when convenient.
Data as of 5 Nov 2026, 00:01 UTC
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 34% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 2.0.3, 1.21.17
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:LExploitation evidence
Disclosed: evidence found.
CVE published 7 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.
What to do
Upgrade Consul and Consul Enterprise to 2.0.3; Consul Enterprise to 1.21.17.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| HashiCorpConsul | Affected
| Fixed in
|
| HashiCorpConsul Enterprise | Affected
| Fixed in
|
GitHubConsulpkg:github/ConsulOther threats | Affected
| Fixed in
|
GitHubConsul Enterprisepkg:github/Consul EnterpriseOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix is available and users should upgrade to Consul version 2.0.3 or later, or to Enterprise versions 1.21.17, 1.22.11, or 2.0.3. Since this is a resource consumption issue, applying the official patches will prevent uncontrolled cache growth. No other mitigations are indicated by the vendor advisory.
Description
Consul Community Edition and Consul Enterprise 1.2.0 through 2.0.2 are vulnerable to an uncontrolled resource consumption issue in the Connect CA roots endpoint that may allow a remote caller to grow the agent's Connect CA roots cache without bound, defeating the operator's cache-disable configuration. This vulnerability, CVE-2026-19015, is fixed in Consul 2.0.3 and Consul Enterprise 1.21.17, 1.22.11, and 2.0.3.