DEBIAN-CVE-2026-33343

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Source
https://security-tracker.debian.org/tracker/CVE-2026-33343
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-33343.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-33343
Upstream
Published
2026-03-26T14:16:13.137Z
Modified
2026-03-27T10:03:18.736432Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
Summary
[none]
Details

etcd is a distributed key-value store for the data of a distributed system. Prior to versions 3.4.42, 3.5.28, and 3.6.9, an authenticated user with RBAC restricted permissions on key ranges can use nested transactions to bypass all key-level authorization. This allows any authenticated user with direct access to etcd to effectively ignore all key range restrictions, accessing the entire etcd data store. Kubernetes does not rely on etcd’s built-in authentication and authorization. Instead, the API server handles authentication and authorization itself, so typical Kubernetes deployments are not affected. Versions 3.4.42, 3.5.28, and 3.6.9 contain a patch. If upgrading is not immediately possible, reduce exposure by treating the affected RPCs as unauthenticated in practice. Restrict network access to etcd server ports so only trusted components can connect and require strong client identity at the transport layer, such as mTLS with tightly scoped client certificate distribution.

References

Affected packages

Debian:11 / etcd

Package

Name
etcd
Purl
pkg:deb/debian/etcd?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.3.25+dfsg-6
3.3.25+dfsg-7
3.3.25+dfsg-8
3.4.23-1
3.4.23-2
3.4.23-3
3.4.23-4
3.4.23-5
3.4.23-6
3.4.30-1
3.4.30-2
3.4.30-3
3.5.5-1
3.5.15-1
3.5.15-2
3.5.15-3
3.5.15-4
3.5.15-5
3.5.15-6
3.5.15-7
3.5.16-1
3.5.16-2
3.5.16-3
3.5.16-4
3.5.16-5
3.5.16-6
3.5.16-7
3.5.16-8
3.5.16-9
3.5.16-10
3.5.22-1
3.5.22-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-33343.json"

Debian:12 / etcd

Package

Name
etcd
Purl
pkg:deb/debian/etcd?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.4.23-4
3.4.23-5
3.4.23-6
3.4.30-1
3.4.30-2
3.4.30-3
3.5.5-1
3.5.15-1
3.5.15-2
3.5.15-3
3.5.15-4
3.5.15-5
3.5.15-6
3.5.15-7
3.5.16-1
3.5.16-2
3.5.16-3
3.5.16-4
3.5.16-5
3.5.16-6
3.5.16-7
3.5.16-8
3.5.16-9
3.5.16-10
3.5.22-1
3.5.22-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-33343.json"

Debian:13 / etcd

Package

Name
etcd
Purl
pkg:deb/debian/etcd?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.5.16-4
3.5.16-5
3.5.16-6
3.5.16-7
3.5.16-8
3.5.16-9
3.5.16-10
3.5.22-1
3.5.22-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-33343.json"

Debian:14 / etcd

Package

Name
etcd
Purl
pkg:deb/debian/etcd?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.5.16-4
3.5.16-5
3.5.16-6
3.5.16-7
3.5.16-8
3.5.16-9
3.5.16-10
3.5.22-1
3.5.22-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-33343.json"