UBUNTU-CVE-2026-23933

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Source
https://ubuntu.com/security/CVE-2026-23933
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-23933.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-23933
Upstream
  • CVE-2026-23933
Published
2026-08-18T13:17:00Z
Modified
2026-09-02T19:35:32Z
Severity
  • 7.7 (High) CVSS_V4 - CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

In Zabbix 7.4 the cryptographic key used for signing Frontend sessions has been erroneously written to the database seed. Currently the only known exploitation scenario is for deployments that utilize both - SAML authentication and guest users. In such cases the key can be used to forge valid session cookies, potentially leading to unauthorized access. For other Zabbix deployments this does not have a known impact.

References

Affected packages

Ubuntu:26.04:LTS
zabbix

Package

Name
zabbix
Purl
pkg:deb/ubuntu/zabbix?arch=source&distro=resolute

Affected ranges

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

Affected versions

1:7.*
1:7.0.10+dfsg-2build1
1:7.0.22+dfsg-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "zabbix-agent",
            "binary_version": "1:7.0.22+dfsg-1"
        },
        {
            "binary_name": "zabbix-agent2",
            "binary_version": "1:7.0.22+dfsg-1"
        },
        {
            "binary_name": "zabbix-frontend-php",
            "binary_version": "1:7.0.22+dfsg-1"
        },
        {
            "binary_name": "zabbix-java-gateway",
            "binary_version": "1:7.0.22+dfsg-1"
        },
        {
            "binary_name": "zabbix-proxy-mysql",
            "binary_version": "1:7.0.22+dfsg-1"
        },
        {
            "binary_name": "zabbix-proxy-pgsql",
            "binary_version": "1:7.0.22+dfsg-1"
        },
        {
            "binary_name": "zabbix-proxy-sqlite3",
            "binary_version": "1:7.0.22+dfsg-1"
        },
        {
            "binary_name": "zabbix-sender",
            "binary_version": "1:7.0.22+dfsg-1"
        },
        {
            "binary_name": "zabbix-server-mysql",
            "binary_version": "1:7.0.22+dfsg-1"
        },
        {
            "binary_name": "zabbix-server-pgsql",
            "binary_version": "1:7.0.22+dfsg-1"
        },
        {
            "binary_name": "zabbix-web-service",
            "binary_version": "1:7.0.22+dfsg-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-23933.json"
Ubuntu:Pro:14.04:LTS
zabbix

Package

Name
zabbix
Purl
pkg:deb/ubuntu/zabbix?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

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

Affected versions

1:2.*
1:2.0.6+dfsg-1ubuntu2
1:2.2.0+dfsg-1ubuntu1
1:2.2.0+dfsg-6ubuntu1
1:2.2.1+dfsg-1ubuntu3
1:2.2.2+dfsg-1ubuntu1
1:2.2.2+dfsg-1ubuntu1+esm1
1:2.2.2+dfsg-1ubuntu1+esm3
1:2.2.2+dfsg-1ubuntu1+esm4
1:2.2.2+dfsg-1ubuntu1+esm5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "zabbix-agent",
            "binary_version": "1:2.2.2+dfsg-1ubuntu1+esm5"
        },
        {
            "binary_name": "zabbix-frontend-php",
            "binary_version": "1:2.2.2+dfsg-1ubuntu1+esm5"
        },
        {
            "binary_name": "zabbix-java-gateway",
            "binary_version": "1:2.2.2+dfsg-1ubuntu1+esm5"
        },
        {
            "binary_name": "zabbix-proxy-mysql",
            "binary_version": "1:2.2.2+dfsg-1ubuntu1+esm5"
        },
        {
            "binary_name": "zabbix-proxy-pgsql",
            "binary_version": "1:2.2.2+dfsg-1ubuntu1+esm5"
        },
        {
            "binary_name": "zabbix-proxy-sqlite3",
            "binary_version": "1:2.2.2+dfsg-1ubuntu1+esm5"
        },
        {
            "binary_name": "zabbix-server-mysql",
            "binary_version": "1:2.2.2+dfsg-1ubuntu1+esm5"
        },
        {
            "binary_name": "zabbix-server-pgsql",
            "binary_version": "1:2.2.2+dfsg-1ubuntu1+esm5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-23933.json"
Ubuntu:Pro:16.04:LTS
zabbix

Package

Name
zabbix
Purl
pkg:deb/ubuntu/zabbix?arch=source&distro=esm-apps%2Fxenial

Affected ranges

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

Affected versions

1:2.*
1:2.4.6+dfsg-1
1:2.4.7+dfsg-1
1:2.4.7+dfsg-2
1:2.4.7+dfsg-2ubuntu2
1:2.4.7+dfsg-2ubuntu2.1
1:2.4.7+dfsg-2ubuntu2.1+esm1
1:2.4.7+dfsg-2ubuntu2.1+esm2
1:2.4.7+dfsg-2ubuntu2.1+esm3
1:2.4.7+dfsg-2ubuntu2.1+esm4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "zabbix-agent",
            "binary_version": "1:2.4.7+dfsg-2ubuntu2.1+esm4"
        },
        {
            "binary_name": "zabbix-frontend-php",
            "binary_version": "1:2.4.7+dfsg-2ubuntu2.1+esm4"
        },
        {
            "binary_name": "zabbix-java-gateway",
            "binary_version": "1:2.4.7+dfsg-2ubuntu2.1+esm4"
        },
        {
            "binary_name": "zabbix-proxy-mysql",
            "binary_version": "1:2.4.7+dfsg-2ubuntu2.1+esm4"
        },
        {
            "binary_name": "zabbix-proxy-pgsql",
            "binary_version": "1:2.4.7+dfsg-2ubuntu2.1+esm4"
        },
        {
            "binary_name": "zabbix-proxy-sqlite3",
            "binary_version": "1:2.4.7+dfsg-2ubuntu2.1+esm4"
        },
        {
            "binary_name": "zabbix-server-mysql",
            "binary_version": "1:2.4.7+dfsg-2ubuntu2.1+esm4"
        },
        {
            "binary_name": "zabbix-server-pgsql",
            "binary_version": "1:2.4.7+dfsg-2ubuntu2.1+esm4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-23933.json"
Ubuntu:Pro:18.04:LTS
zabbix

Package

Name
zabbix
Purl
pkg:deb/ubuntu/zabbix?arch=source&distro=esm-apps%2Fbionic

Affected ranges

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

Affected versions

1:3.*
1:3.0.7+dfsg-3
1:3.0.12+dfsg-1
1:3.0.12+dfsg-1ubuntu0.1~esm1
1:3.0.12+dfsg-1ubuntu0.1~esm2
1:3.0.12+dfsg-1ubuntu0.1~esm3
1:3.0.12+dfsg-1ubuntu0.1~esm4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "zabbix-agent",
            "binary_version": "1:3.0.12+dfsg-1ubuntu0.1~esm4"
        },
        {
            "binary_name": "zabbix-frontend-php",
            "binary_version": "1:3.0.12+dfsg-1ubuntu0.1~esm4"
        },
        {
            "binary_name": "zabbix-java-gateway",
            "binary_version": "1:3.0.12+dfsg-1ubuntu0.1~esm4"
        },
        {
            "binary_name": "zabbix-proxy-mysql",
            "binary_version": "1:3.0.12+dfsg-1ubuntu0.1~esm4"
        },
        {
            "binary_name": "zabbix-proxy-pgsql",
            "binary_version": "1:3.0.12+dfsg-1ubuntu0.1~esm4"
        },
        {
            "binary_name": "zabbix-proxy-sqlite3",
            "binary_version": "1:3.0.12+dfsg-1ubuntu0.1~esm4"
        },
        {
            "binary_name": "zabbix-server-mysql",
            "binary_version": "1:3.0.12+dfsg-1ubuntu0.1~esm4"
        },
        {
            "binary_name": "zabbix-server-pgsql",
            "binary_version": "1:3.0.12+dfsg-1ubuntu0.1~esm4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-23933.json"
Ubuntu:Pro:20.04:LTS
zabbix

Package

Name
zabbix
Purl
pkg:deb/ubuntu/zabbix?arch=source&distro=esm-apps%2Ffocal

Affected ranges

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

Affected versions

1:4.*
1:4.0.4+dfsg-1build2
1:4.0.4+dfsg-1build3
1:4.0.11+dfsg-1
1:4.0.14+dfsg-1
1:4.0.15+dfsg-1
1:4.0.16+dfsg-1
1:4.0.16+dfsg-1build1
1:4.0.17+dfsg-1
1:4.0.17+dfsg-1ubuntu0.1~esm1
1:4.0.17+dfsg-1ubuntu0.1~esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "zabbix-agent",
            "binary_version": "1:4.0.17+dfsg-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "zabbix-frontend-php",
            "binary_version": "1:4.0.17+dfsg-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "zabbix-java-gateway",
            "binary_version": "1:4.0.17+dfsg-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "zabbix-proxy-mysql",
            "binary_version": "1:4.0.17+dfsg-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "zabbix-proxy-pgsql",
            "binary_version": "1:4.0.17+dfsg-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "zabbix-proxy-sqlite3",
            "binary_version": "1:4.0.17+dfsg-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "zabbix-server-mysql",
            "binary_version": "1:4.0.17+dfsg-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "zabbix-server-pgsql",
            "binary_version": "1:4.0.17+dfsg-1ubuntu0.1~esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-23933.json"
Ubuntu:Pro:22.04:LTS
zabbix

Package

Name
zabbix
Purl
pkg:deb/ubuntu/zabbix?arch=source&distro=esm-apps%2Fjammy

Affected ranges

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

Affected versions

1:5.*
1:5.0.8+dfsg-1build1
1:5.0.14+dfsg-1
1:5.0.17+dfsg-1
1:5.0.17+dfsg-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "zabbix-agent",
            "binary_version": "1:5.0.17+dfsg-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "zabbix-frontend-php",
            "binary_version": "1:5.0.17+dfsg-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "zabbix-java-gateway",
            "binary_version": "1:5.0.17+dfsg-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "zabbix-proxy-mysql",
            "binary_version": "1:5.0.17+dfsg-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "zabbix-proxy-pgsql",
            "binary_version": "1:5.0.17+dfsg-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "zabbix-proxy-sqlite3",
            "binary_version": "1:5.0.17+dfsg-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "zabbix-server-mysql",
            "binary_version": "1:5.0.17+dfsg-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "zabbix-server-pgsql",
            "binary_version": "1:5.0.17+dfsg-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-23933.json"