UBUNTU-CVE-2026-88021

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Source

https://ubuntu.com/security/CVE-2026-88021

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88021.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-88021

Upstream

CVE-2026-88021

Published

2026-09-10T19:17:00Z

Modified

2026-09-16T14:03:25Z

Severity

7.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

Consul and Consul Enterprise are vulnerable to an authorization bypass in the Connect service mesh that may allow a service to reach a destination it is not authorized to access. When building Envoy RBAC rules to enforce Connect intentions, Consul did not correctly escape certain characters in service names, namespaces, and partitions, causing the generated authorization rules to match more broadly than intended. This vulnerability (CVE-2026-88021) is fixed in Consul 2.0.4 and Consul Enterprise 1.21.18, 1.22.12 and 2.0.4.

References

Affected packages

Ubuntu:18.04:LTS / consul

Package

Name: consul
Purl: pkg:deb/ubuntu/consul?arch=source&distro=bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.6.4~dfsg-3

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "consul",
            "binary_version": "0.6.4~dfsg-3"
        },
        {
            "binary_name": "golang-github-hashicorp-consul-dev",
            "binary_version": "0.6.4~dfsg-3"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88021.json"

Ubuntu:20.04:LTS / consul

Package

Name: consul
Purl: pkg:deb/ubuntu/consul?arch=source&distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.0.7~dfsg1-5ubuntu1

1.4.4~dfsg1-2ubuntu2

1.5.2+dfsg1-6

1.5.2+dfsg1-10

1.5.2+dfsg1-12

1.5.2+dfsg2-14

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "consul",
            "binary_version": "1.5.2+dfsg2-14"
        },
        {
            "binary_name": "golang-github-hashicorp-consul-dev",
            "binary_version": "1.5.2+dfsg2-14"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88021.json"

Ubuntu:22.04:LTS / consul

Package

Name: consul
Purl: pkg:deb/ubuntu/consul?arch=source&distro=jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.7.4+dfsg1-1

1.8.7+dfsg1-3

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "consul",
            "binary_version": "1.8.7+dfsg1-3"
        },
        {
            "binary_name": "golang-github-hashicorp-consul-dev",
            "binary_version": "1.8.7+dfsg1-3"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88021.json"