UBUNTU-CVE-2026-1801

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Source
https://ubuntu.com/security/CVE-2026-1801
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1801.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-1801
Upstream
  • CVE-2026-1801
Downstream
Related
Published
2026-02-03T21:16:00Z
Modified
2026-09-18T23:45:04Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A flaw was found in libsoup, an HTTP client/server library. This HTTP Request Smuggling vulnerability arises from non-RFC-compliant parsing in the soup_filter_input_stream_read_line() logic, where libsoup accepts malformed chunk headers, such as lone line feed (LF) characters instead of the required carriage return and line feed (CRLF). A remote attacker can exploit this without authentication or user interaction by sending specially crafted chunked requests. This allows libsoup to parse and process multiple HTTP requests from a single network message, potentially leading to information disclosure.

References

Affected packages

Ubuntu:22.04:LTS
libsoup2.4

Package

Name
libsoup2.4
Purl
pkg:deb/ubuntu/libsoup2.4?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.74.2-3ubuntu0.8

Affected versions

2.*
2.72.0-3ubuntu3
2.74.1-1
2.74.2-2
2.74.2-3
2.74.2-3ubuntu0.1
2.74.2-3ubuntu0.2
2.74.2-3ubuntu0.3
2.74.2-3ubuntu0.4
2.74.2-3ubuntu0.5
2.74.2-3ubuntu0.6
2.74.2-3ubuntu0.7

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "gir1.2-soup-2.4",
            "binary_version":  "2.74.2-3ubuntu0.8"
        },
        {
            "binary_name":  "libsoup-gnome2.4-1",
            "binary_version":  "2.74.2-3ubuntu0.8"
        },
        {
            "binary_name":  "libsoup2.4-1",
            "binary_version":  "2.74.2-3ubuntu0.8"
        },
        {
            "binary_name":  "libsoup2.4-common",
            "binary_version":  "2.74.2-3ubuntu0.8"
        },
        {
            "binary_name":  "libsoup2.4-tests",
            "binary_version":  "2.74.2-3ubuntu0.8"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1801.json"
Ubuntu:24.04:LTS
libsoup2.4

Package

Name
libsoup2.4
Purl
pkg:deb/ubuntu/libsoup2.4?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.74.3-6ubuntu1.8

Affected versions

2.*
2.74.3-1
2.74.3-2
2.74.3-3
2.74.3-6
2.74.3-6build1
2.74.3-6ubuntu1
2.74.3-6ubuntu1.1
2.74.3-6ubuntu1.2
2.74.3-6ubuntu1.3
2.74.3-6ubuntu1.4
2.74.3-6ubuntu1.5
2.74.3-6ubuntu1.6
2.74.3-6ubuntu1.7

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "gir1.2-soup-2.4",
            "binary_version":  "2.74.3-6ubuntu1.8"
        },
        {
            "binary_name":  "libsoup-2.4-1",
            "binary_version":  "2.74.3-6ubuntu1.8"
        },
        {
            "binary_name":  "libsoup-gnome-2.4-1",
            "binary_version":  "2.74.3-6ubuntu1.8"
        },
        {
            "binary_name":  "libsoup2.4-common",
            "binary_version":  "2.74.3-6ubuntu1.8"
        },
        {
            "binary_name":  "libsoup2.4-tests",
            "binary_version":  "2.74.3-6ubuntu1.8"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1801.json"
libsoup3

Package

Name
libsoup3
Purl
pkg:deb/ubuntu/libsoup3?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.4.4-5ubuntu0.8

Affected versions

3.*
3.4.2-4
3.4.4-1
3.4.4-2
3.4.4-4
3.4.4-5
3.4.4-5build1
3.4.4-5build2
3.4.4-5ubuntu0.1
3.4.4-5ubuntu0.2
3.4.4-5ubuntu0.3
3.4.4-5ubuntu0.4
3.4.4-5ubuntu0.5
3.4.4-5ubuntu0.6
3.4.4-5ubuntu0.7

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "gir1.2-soup-3.0",
            "binary_version":  "3.4.4-5ubuntu0.8"
        },
        {
            "binary_name":  "libsoup-3.0-0",
            "binary_version":  "3.4.4-5ubuntu0.8"
        },
        {
            "binary_name":  "libsoup-3.0-common",
            "binary_version":  "3.4.4-5ubuntu0.8"
        },
        {
            "binary_name":  "libsoup-3.0-tests",
            "binary_version":  "3.4.4-5ubuntu0.8"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1801.json"
Ubuntu:25.10
libsoup2.4

Package

Name
libsoup2.4
Purl
pkg:deb/ubuntu/libsoup2.4?arch=source&distro=questing

Affected ranges

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

Affected versions

2.*
2.74.3-10
2.74.3-10.1
2.74.3-10.1ubuntu1
2.74.3-10.1ubuntu2
2.74.3-10.1ubuntu3
2.74.3-10.1ubuntu4
2.74.3-10.1ubuntu4.1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "gir1.2-soup-2.4",
            "binary_version":  "2.74.3-10.1ubuntu4.1"
        },
        {
            "binary_name":  "libsoup-2.4-1",
            "binary_version":  "2.74.3-10.1ubuntu4.1"
        },
        {
            "binary_name":  "libsoup-gnome-2.4-1",
            "binary_version":  "2.74.3-10.1ubuntu4.1"
        },
        {
            "binary_name":  "libsoup2.4-common",
            "binary_version":  "2.74.3-10.1ubuntu4.1"
        },
        {
            "binary_name":  "libsoup2.4-tests",
            "binary_version":  "2.74.3-10.1ubuntu4.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1801.json"
libsoup3

Package

Name
libsoup3
Purl
pkg:deb/ubuntu/libsoup3?arch=source&distro=questing

Affected ranges

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

Affected versions

3.*
3.6.5-1
3.6.5-1ubuntu1
3.6.5-3
3.6.5-4
3.6.5-4ubuntu0.1
3.6.5-4ubuntu0.2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "gir1.2-soup-3.0",
            "binary_version":  "3.6.5-4ubuntu0.2"
        },
        {
            "binary_name":  "libsoup-3.0-0",
            "binary_version":  "3.6.5-4ubuntu0.2"
        },
        {
            "binary_name":  "libsoup-3.0-common",
            "binary_version":  "3.6.5-4ubuntu0.2"
        },
        {
            "binary_name":  "libsoup-3.0-tests",
            "binary_version":  "3.6.5-4ubuntu0.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1801.json"
Ubuntu:Pro:16.04:LTS
libsoup2.4

Package

Name
libsoup2.4
Purl
pkg:deb/ubuntu/libsoup2.4?arch=source&distro=esm-infra-legacy%2Fxenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.52.2-1ubuntu0.3+esm7

Affected versions

2.*
2.50.0-2debian1
2.52.1-1
2.52.2-1
2.52.2-1ubuntu0.1
2.52.2-1ubuntu0.2
2.52.2-1ubuntu0.3
2.52.2-1ubuntu0.3+esm1
2.52.2-1ubuntu0.3+esm2
2.52.2-1ubuntu0.3+esm3
2.52.2-1ubuntu0.3+esm4
2.52.2-1ubuntu0.3+esm5
2.52.2-1ubuntu0.3+esm6

Ecosystem specific 

{
    "availability":  "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries":  [
        {
            "binary_name":  "gir1.2-soup-2.4",
            "binary_version":  "2.52.2-1ubuntu0.3+esm7"
        },
        {
            "binary_name":  "libsoup-gnome2.4-1",
            "binary_version":  "2.52.2-1ubuntu0.3+esm7"
        },
        {
            "binary_name":  "libsoup2.4-1",
            "binary_version":  "2.52.2-1ubuntu0.3+esm7"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1801.json"
Ubuntu:Pro:18.04:LTS
libsoup2.4

Package

Name
libsoup2.4
Purl
pkg:deb/ubuntu/libsoup2.4?arch=source&distro=esm-infra%2Fbionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.62.1-1ubuntu0.4+esm8

Affected versions

2.*
2.60.1-1
2.60.2-1
2.60.2-2
2.60.3-1
2.61.90-1
2.62.0-1
2.62.1-1
2.62.1-1ubuntu0.1
2.62.1-1ubuntu0.3
2.62.1-1ubuntu0.4
2.62.1-1ubuntu0.4+esm1
2.62.1-1ubuntu0.4+esm2
2.62.1-1ubuntu0.4+esm3
2.62.1-1ubuntu0.4+esm4
2.62.1-1ubuntu0.4+esm5
2.62.1-1ubuntu0.4+esm6
2.62.1-1ubuntu0.4+esm7

Ecosystem specific 

{
    "availability":  "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries":  [
        {
            "binary_name":  "gir1.2-soup-2.4",
            "binary_version":  "2.62.1-1ubuntu0.4+esm8"
        },
        {
            "binary_name":  "libsoup-gnome2.4-1",
            "binary_version":  "2.62.1-1ubuntu0.4+esm8"
        },
        {
            "binary_name":  "libsoup2.4-1",
            "binary_version":  "2.62.1-1ubuntu0.4+esm8"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1801.json"
Ubuntu:Pro:20.04:LTS
libsoup2.4

Package

Name
libsoup2.4
Purl
pkg:deb/ubuntu/libsoup2.4?arch=source&distro=esm-infra%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.70.0-1ubuntu0.5+esm3

Affected versions

2.*
2.68.2-0ubuntu1
2.68.2-1
2.68.2-2
2.68.2-2build2
2.69.90-1
2.70.0-1
2.70.0-1ubuntu0.1
2.70.0-1ubuntu0.2
2.70.0-1ubuntu0.3
2.70.0-1ubuntu0.4
2.70.0-1ubuntu0.5
2.70.0-1ubuntu0.5+esm1
2.70.0-1ubuntu0.5+esm2

Ecosystem specific 

{
    "availability":  "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries":  [
        {
            "binary_name":  "gir1.2-soup-2.4",
            "binary_version":  "2.70.0-1ubuntu0.5+esm3"
        },
        {
            "binary_name":  "libsoup-gnome2.4-1",
            "binary_version":  "2.70.0-1ubuntu0.5+esm3"
        },
        {
            "binary_name":  "libsoup2.4-1",
            "binary_version":  "2.70.0-1ubuntu0.5+esm3"
        },
        {
            "binary_name":  "libsoup2.4-tests",
            "binary_version":  "2.70.0-1ubuntu0.5+esm3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1801.json"
Ubuntu:Pro:22.04:LTS
libsoup3

Package

Name
libsoup3
Purl
pkg:deb/ubuntu/libsoup3?arch=source&distro=esm-apps%2Fjammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.0.7-0ubuntu1+esm8

Affected versions

3.*
3.0.4-2
3.0.4-3
3.0.5-1
3.0.7-0ubuntu1
3.0.7-0ubuntu1+esm1
3.0.7-0ubuntu1+esm2
3.0.7-0ubuntu1+esm3
3.0.7-0ubuntu1+esm4
3.0.7-0ubuntu1+esm5
3.0.7-0ubuntu1+esm6
3.0.7-0ubuntu1+esm7

Ecosystem specific 

{
    "availability":  "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries":  [
        {
            "binary_name":  "gir1.2-soup-3.0",
            "binary_version":  "3.0.7-0ubuntu1+esm8"
        },
        {
            "binary_name":  "libsoup-3.0-0",
            "binary_version":  "3.0.7-0ubuntu1+esm8"
        },
        {
            "binary_name":  "libsoup-3.0-common",
            "binary_version":  "3.0.7-0ubuntu1+esm8"
        },
        {
            "binary_name":  "libsoup-3.0-tests",
            "binary_version":  "3.0.7-0ubuntu1+esm8"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1801.json"
Ubuntu:Pro:26.04:LTS
libsoup2.4

Package

Name
libsoup2.4
Purl
pkg:deb/ubuntu/libsoup2.4?arch=source&distro=esm-apps%2Fresolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.74.3-10.1ubuntu5+esm2

Affected versions

2.*
2.74.3-10.1ubuntu4
2.74.3-10.1ubuntu5
2.74.3-10.1ubuntu5+esm1

Ecosystem specific 

{
    "availability":  "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries":  [
        {
            "binary_name":  "gir1.2-soup-2.4",
            "binary_version":  "2.74.3-10.1ubuntu5+esm2"
        },
        {
            "binary_name":  "libsoup-2.4-1",
            "binary_version":  "2.74.3-10.1ubuntu5+esm2"
        },
        {
            "binary_name":  "libsoup-gnome-2.4-1",
            "binary_version":  "2.74.3-10.1ubuntu5+esm2"
        },
        {
            "binary_name":  "libsoup2.4-common",
            "binary_version":  "2.74.3-10.1ubuntu5+esm2"
        },
        {
            "binary_name":  "libsoup2.4-tests",
            "binary_version":  "2.74.3-10.1ubuntu5+esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1801.json"