CVE-2026-19015Network attack vectorHinoki check available

Availability degradation via unbounded CA roots cache

Published Aug 7, 2026 · Updated Aug 7, 2026

Uncontrolled resource consumption in HashiCorp Consul and Consul Enterprise 1.2.0 through 2.0.2 allows remote attackers to degrade agent availability. The Connect CA roots endpoint ignores http_config.use_cache=false and creates unbounded agent-cache entries from repeated requests. No valid ACL token is required, and disabling HTTP caching does not prevent the resulting memory pressure and service degradation.

CVSS severity5.3
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Uncontrolled resource consumption in HashiCorp Consul and Consul Enterprise 1.2.0 through 2.0.2 allows remote attackers to degrade agent availability. The Connect CA roots endpoint ignores http_config.use_cache=false and creates unbounded agent-cache entries from repeated requests. No valid ACL token is required, and disabling HTTP caching does not prevent the resulting memory pressure and service degradation.

The record

CVE
CVE-2026-19015
Published
Aug 7, 2026
Updated
Aug 7, 2026
Vendor
HashiCorp
Product
Consul Enterprise
Classifications
CWE-770, CAPEC-469, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 7, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.2.0 <2.0.3 changes=[{"at":"1.21.17","status":"unaffected"},{"at":"1.22.11","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HashiCorp · Consul Enterpriseversion=1.2.0 <2.0.3 changes=[{"at":"1.21.17","status":"unaffected"},{"at":"1.22.11","status":"unaffected"}]
HashiCorp · Consulversion=1.2.0 <2.0.3

Published CVSS scores

5.3HashiCorpCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
CAPEC-469HTTP DoS
T1499.003Application Exhaustion Flood

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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