CVE-2026-19016Network attack vectorHinoki check available

Unauthorized session deletion via missing ACL check

Published Aug 7, 2026 · Updated Aug 7, 2026

Authorization bypass in HashiCorp Consul and Consul Enterprise 1.19.1 through 2.0.2 allows remote authenticated users to delete sessions. The transaction API session-deletion path processes deletion operations without enforcing the session:write ACL permission required for them. Reachability requires an authenticated caller with network access to the server RPC port; arbitrary deletion can disrupt distributed locks, leader election, and health coordination.

CVSS severity4.2
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Authorization bypass in HashiCorp Consul and Consul Enterprise 1.19.1 through 2.0.2 allows remote authenticated users to delete sessions. The transaction API session-deletion path processes deletion operations without enforcing the session:write ACL permission required for them. Reachability requires an authenticated caller with network access to the server RPC port; arbitrary deletion can disrupt distributed locks, leader election, and health coordination.

The record

CVE
CVE-2026-19016
Published
Aug 7, 2026
Updated
Aug 7, 2026
Vendor
HashiCorp
Product
Consul Enterprise
Classifications
CWE-22, CAPEC-126
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=1.19.1 <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=1.19.1 <2.0.3 changes=[{"at":"1.21.17","status":"unaffected"},{"at":"1.22.11","status":"unaffected"}]
HashiCorp · Consulversion=1.19.1 <2.0.3

Published CVSS scores

4.2HashiCorp Inc.CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CAPEC-126Path Traversal

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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