UBUNTU-CVE-2026-16599

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Source

https://ubuntu.com/security/CVE-2026-16599

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-16599.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-16599

Upstream

CVE-2026-16599

Published

2026-08-25T15:16:00Z

Modified

2026-09-02T19:35:35.560926360Z

Severity

5.1 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

GNU wget is vulnerable to denial of service in its FTP OPIE/S-KEY authentication functionality. The server-supplied sequence number from the FTP challenge line is used as an iteration count for an MD5 key-derivation loop without any upper bound validation. A malicious FTP server or a network attacker positioned to intercept FTP traffic can send a crafted OPIE challenge with a sequence number near INT_MAX, causing wget to perform up to approximately 2.1 billion MD5 computations and suspend for some time. The --timeout option does not mitigate this because it applies only to network I/O, not CPU computation. This issue was fixed in commit e9697d98e7249b0f68a6be040a4f3dcc5bc101fa

References

Affected packages

Ubuntu:22.04:LTS

wget

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.21-1ubuntu3

1.21-1ubuntu4

1.21-1ubuntu5

1.21.2-2ubuntu1

1.21.2-2ubuntu1.1

1.21.2-2ubuntu1.3

1.21.2-2ubuntu1.4

1.21.2-2ubuntu1.5

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "1.21.2-2ubuntu1.5",
            "binary_name": "wget"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-16599.json"

Ubuntu:24.04:LTS

wget

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.21.3-1ubuntu1

1.21.4-1ubuntu1

1.21.4-1ubuntu2

1.21.4-1ubuntu3

1.21.4-1ubuntu4

1.21.4-1ubuntu4.1

1.21.4-1ubuntu4.3

1.21.4-1ubuntu4.4

1.21.4-1ubuntu4.5

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "1.21.4-1ubuntu4.5",
            "binary_name": "wget"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-16599.json"

Ubuntu:26.04:LTS

wget

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.25.0-2ubuntu3

1.25.0-2ubuntu4

1.25.0-2ubuntu4.2

1.25.0-2ubuntu4.3

1.25.0-2ubuntu4.4

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "1.25.0-2ubuntu4.4",
            "binary_name": "wget"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-16599.json"

Ubuntu:Pro:14.04:LTS

wget

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.14-2ubuntu1

1.14-5ubuntu1

1.15-1ubuntu1

1.15-1ubuntu1.14.04.1

1.15-1ubuntu1.14.04.2

1.15-1ubuntu1.14.04.3

1.15-1ubuntu1.14.04.4

1.15-1ubuntu1.14.04.5

1.15-1ubuntu1.14.04.5+esm2

1.15-1ubuntu1.14.04.5+esm3

1.15-1ubuntu1.14.04.5+esm4

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "1.15-1ubuntu1.14.04.5+esm4",
            "binary_name": "wget"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-16599.json"

Ubuntu:Pro:16.04:LTS

wget

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.16.1-1ubuntu1

1.17.1-1ubuntu1

1.17.1-1ubuntu1.1

1.17.1-1ubuntu1.2

1.17.1-1ubuntu1.3

1.17.1-1ubuntu1.4

1.17.1-1ubuntu1.5

1.17.1-1ubuntu1.5+esm1

1.17.1-1ubuntu1.5+esm3

1.17.1-1ubuntu1.5+esm4

1.17.1-1ubuntu1.5+esm5

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "1.17.1-1ubuntu1.5+esm5",
            "binary_name": "wget"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-16599.json"

Ubuntu:Pro:18.04:LTS

wget

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.19.1-3ubuntu1

1.19.1-3ubuntu1.1

1.19.2-1ubuntu1

1.19.3-2ubuntu1

1.19.4-1ubuntu2

1.19.4-1ubuntu2.1

1.19.4-1ubuntu2.2

1.19.4-1ubuntu2.2+esm1

1.19.4-1ubuntu2.2+esm3

1.19.4-1ubuntu2.2+esm4

1.19.4-1ubuntu2.2+esm5

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "1.19.4-1ubuntu2.2+esm5",
            "binary_name": "wget"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-16599.json"

Ubuntu:Pro:20.04:LTS

wget

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.20.3-1ubuntu1

1.20.3-1ubuntu2

1.20.3-1ubuntu2.1

1.20.3-1ubuntu2.1+esm2

1.20.3-1ubuntu2.1+esm3

1.20.3-1ubuntu2.1+esm4

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "1.20.3-1ubuntu2.1+esm4",
            "binary_name": "wget"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-16599.json"