UBUNTU-CVE-2026-100698

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2026-100698
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100698.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-100698
Upstream
Published
2026-09-26T14:16:00Z
Modified
2026-09-30T21:41:52Z
Severity
  • 5.8 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N CVSS Calculator
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Adminer 5.5.1 through 6.0.1 improperly parses the login 'server' string in the host_port() function in adminer/include/functions.inc.php. The port capture group requires pure digits anchored to the end of the string, so any server value with a non-digit tail fails the regex and falls back to returning the whole string as the host with an empty port. Because the privileged-port restriction in adminer/include/auth.inc.php inspects only the parsed port, the check is skipped, and the mysqli/mysqlnd client subsequently re-parses host:port from the host string and opens a TCP connection. A remote, unauthenticated attacker who can reach the Adminer login page can submit a crafted value such as 127.0.0.1:80/x to make the server initiate TCP connections to arbitrary internal hosts and privileged ports before credentials are validated, enabling server-side request forgery and blind internal port scanning (connection refused vs. handshake vs. timeout acts as a liveness oracle). This is a regression that re-opens the bypass fixed in 5.5.0 (GHSA-58cq-mgw2-38m5). Fixed in 6.0.2.

References

Affected packages

Ubuntu:22.04:LTS
adminer

Package

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

Affected ranges

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

Affected versions

4.*
4.7.9-2
4.8.1-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "adminer",
            "binary_version":  "4.8.1-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100698.json"
Ubuntu:24.04:LTS
adminer

Package

Name
adminer
Purl
pkg:deb/ubuntu/adminer?arch=source&distro=noble

Affected ranges

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

Affected versions

4.*
4.8.1-1
4.8.1-1ubuntu1
4.8.1-2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "adminer",
            "binary_version":  "4.8.1-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100698.json"
Ubuntu:26.04:LTS
adminer

Package

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

Affected ranges

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

Affected versions

5.*
5.2.1+dfsg-1
5.3.0+dfsg-1
5.4.0+dfsg-1
5.4.1+dfsg-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "adminer",
            "binary_version":  "5.4.1+dfsg-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100698.json"
Ubuntu:Pro:16.04:LTS
adminer

Package

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

Affected ranges

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

Affected versions

4.*
4.2.1-1
4.2.1-1ubuntu1
4.2.1-1ubuntu1+esm1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "adminer",
            "binary_version":  "4.2.1-1ubuntu1+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100698.json"
Ubuntu:Pro:18.04:LTS
adminer

Package

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

Affected ranges

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

Affected versions

4.*
4.3.1-2
4.5.0-1
4.6.1-1
4.6.2-1
4.6.2-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "adminer",
            "binary_version":  "4.6.2-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100698.json"
Ubuntu:Pro:20.04:LTS
adminer

Package

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

Affected ranges

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

Affected versions

4.*
4.7.2-1
4.7.4-1
4.7.5-1
4.7.6-1
4.7.6-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "adminer",
            "binary_version":  "4.7.6-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100698.json"