Monitor vulnerabilities like this one. Sign up free to get alerted when software you use is affected.
4.2

Unauthorized access to sessions in Consul via transaction API

CVE-2026-19016 · published 2 days ago
Summary

Consul versions 1.19.1 to 2.0.2 allow an authenticated user to delete sessions they shouldn't be able to. This is a security risk because it could be exploited by someone with access to the Consul server. To fix this, update to Consul 2.0.3 or later versions.

What to do
  • Update hashicorp consul enterprise to version 1.22.11.
  • Update consul to version 2.0.3.
  • Update hashicorp consul to version 2.0.3 or later.
Affected software
Ecosystem VendorProductAffected versions
– hashicorp consul < 2.0.3
– hashicorp consul enterprise < 2.0.3
Fix: upgrade to 1.22.11
Bitnami – consul >= 1.19.1, < 2.0.3
Fix: upgrade to 2.0.3
Original advisory text
Authorization bypass for session deletion in the transaction API
Consul Community Edition and Consul Enterprise 1.19.1 through 2.0.2 did not enforce the {{session:write}} ACL permission for session deletion operations submitted through the transaction API. An authenticated caller with network access to the Consul server RPC port could delete arbitrary sessions without holding the required permission. This vulnerability, CVE-2026-19016, is fixed in Consul 2.0.3 and Consul Enterprise 1.21.17, 1.22.11, and 2.0.3.
References
Severity
4.2 Medium
CVSS 3.1: 4.2 (MITRE)
Exploitation
EPSS <1%
Type
CWE-22Path Traversal
Timeline
Published17 Aug 2026
Updated17 Aug 2026
First seen7 Aug 2026
Sources
CVE-2026-19016 · NVD
CVE-2026-19016 · MITRE
BIT-consul-2026-19016 · OSV
Monitor software like this
Free during beta