CVE-2026-19016 Authorization bypass for session deletion in the transaction API
Authenticated attackers can delete arbitrary sessions without required permissions via the transaction API, bypassing ACL controls in Consul.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-19016?
CVE-2026-19016 is a medium-severity missing authorization vulnerability in HashiCorp Consul, published on 7 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-22
Which versions are affected by CVE-2026-19016?
1 open source package ship an affected version, including consul.
| Package | Affected | Fixed in |
|---|---|---|
consul Bitnami | From 1.19.1 | 2.0.3 |
How do I fix CVE-2026-19016?
Upgrade consul to 2.0.3 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-19016 being exploited?
There is no known exploitation of CVE-2026-19016 in the wild and no public exploit code.
Sources
Also known as BIT-consul-2026-19016, DEBIAN-CVE-2026-19016, GHSA-7qhj-3fg3-mh5r, MINI-j4hp-95m8-9695, MINI-m964-7pjr-fjx3, UBUNTU-CVE-2026-19016.