CVE-2026-19012Network attack vectorHinoki check available

Authenticated agent crash via service-router downgrade check

Published Aug 7, 2026 · Updated Aug 7, 2026

NULL pointer dereference in HashiCorp Consul and Consul Enterprise 1.18.0 through 2.0.2 allows remote authenticated users to crash agents. The downgrade compatibility check mishandles a valid service-router entry after normalization and validation, dereferencing a null value and exiting. Exploitation requires downgrade mode and config-entry write permission, although ACL-disabled deployments require no token; the agent exit interrupts the Consul server.

CVSS severity5.3
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

NULL pointer dereference in HashiCorp Consul and Consul Enterprise 1.18.0 through 2.0.2 allows remote authenticated users to crash agents. The downgrade compatibility check mishandles a valid service-router entry after normalization and validation, dereferencing a null value and exiting. Exploitation requires downgrade mode and config-entry write permission, although ACL-disabled deployments require no token; the agent exit interrupts the Consul server.

The record

CVE
CVE-2026-19012
Published
Aug 7, 2026
Updated
Aug 7, 2026
Vendor
HashiCorp
Product
Consul Enterprise
Classifications
CWE-476, CAPEC-153, T1499.004
Attack vector
network
Privileges
authenticated

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=1.18.0 <2.0.3 changes=[{"at":"1.21.17","status":"unaffected"},{"at":"1.22.11","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

HashiCorp · Consul Enterpriseversion=1.18.0 <2.0.3 changes=[{"at":"1.21.17","status":"unaffected"},{"at":"1.22.11","status":"unaffected"}]
HashiCorp · Consulversion=1.18.0 <2.0.3

Published CVSS scores

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

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
CAPEC-153Input Data Manipulation
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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