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CVE-2026-19016

Authorization bypass for session deletion in the transaction API

4.2 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
Low
Availability
Low

Exploit likelihood

0.27%Up 0.1 points since Aug 8, 2026
90%50%10%1%

What each source reports

CVE List Score used 4.2

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.

Record
CVE-2026-19016
CVSS 3.1
4.2 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L
Weakness
CWE-22
Updated
2026-11-02
EUVDEUVD-2026-54605 4.2

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.

Record
EUVD-2026-54605
CVSS 3.1
4.2 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L
Updated
2026-11-02
GitHub AdvisoriesGHSA-7qhj-3fg3-mh5r 4.2

Consul Community Edition and Consul Enterprise 1.19.1 through 2.0.2 did not enforce the {{session...

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.

Record
GHSA-7qhj-3fg3-mh5r
CVSS 3.1
4.2 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L
Weakness
CWE-22
Updated
2026-11-02
NVD 4.2

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.

Record
CVE-2026-19016
CVSS 3.1
4.2 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L
Weakness
CWE-22
Updated
2026-11-02
OSV 4.2

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.

Record
CVE-2026-19016
CVSS 3.1
4.2 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L
Weakness
CWE-22
Updated
2026-11-02
OSVDEBIAN-CVE-2026-19016 4.2

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.

Record
DEBIAN-CVE-2026-19016
CVSS 3.1
4.2 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L
Updated
2026-11-02
OSVUBUNTU-CVE-2026-19016 4.2

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.

Record
UBUNTU-CVE-2026-19016
CVSS 3.1
4.2 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L
Updated
2026-11-02
OSVBIT-consul-2026-19016 No score

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.

Record
BIT-consul-2026-19016
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
consul
Bitnami
1.19.1 up to 2.0.3
2.0.3
consul
Debian:11
All versions, plus listed versions
1.10.12+dfsg1-11.8.7+dfsg1-21.8.7+dfsg1-31.8.7+dfsg1-41.8.7+dfsg1-51.8.7+dfsg1-61.9.17+dfsg2-1
None known
consul
Ubuntu:18.04:LTS
All versions, plus listed versions
0.6.4~dfsg-3
None known
consul
Ubuntu:20.04:LTS
All versions, plus listed versions
1.0.7~dfsg1-5ubuntu11.4.4~dfsg1-2ubuntu21.5.2+dfsg1-61.5.2+dfsg1-101.5.2+dfsg1-121.5.2+dfsg2-14
None known
consul
Ubuntu:22.04:LTS
All versions, plus listed versions
1.7.4+dfsg1-11.8.7+dfsg1-3
None known

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-19016 is a medium vulnerability (CVSS 4.2) in Hashicorp Consul, published August 7, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.27%, the 20th percentile. Fixed in consul 2.0.3.

References

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