UBUNTU-CVE-2026-113436

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Source
https://ubuntu.com/security/CVE-2026-113436
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-113436.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-113436
Upstream
Published
2026-10-26T14:16:00Z
Modified
2026-10-28T20:15:44Z
Severity
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Inefficient Algorithmic Complexity vulnerability in the header integer parser of mtrudel bandit allows an unauthenticated remote attacker to consume server CPU via a content-length value or a Host or :authority port made of thousands of digits. Bandit.Headers.parse_integer/2 in lib/bandit/headers.ex builds the number one digit at a time with no limit on the digit count, allocating a new bignum at each step, so one value costs time quadratic in its length. It runs on raw request input over HTTP/1 and HTTP/2, before any range check. Over HTTP/2, a 4,000-digit value can be stored once in the HPACK dynamic table and re-sent on each new stream for about one byte: 124 KB of traffic kept the server busy for 27.9 s. This issue affects bandit: from 1.0.0-pre.7 before 1.14.0.

References

Affected packages

Ubuntu:16.04:LTS
bandit

Package

Name
bandit
Purl
pkg:deb/ubuntu/bandit?arch=source&distro=xenial

Affected ranges

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

Affected versions

0.*
0.13.2-1
0.13.2-3

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "bandit",
            "binary_version":  "0.13.2-3"
        },
        {
            "binary_name":  "python-bandit",
            "binary_version":  "0.13.2-3"
        },
        {
            "binary_name":  "python3-bandit",
            "binary_version":  "0.13.2-3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-113436.json"
Ubuntu:18.04:LTS
bandit

Package

Name
bandit
Purl
pkg:deb/ubuntu/bandit?arch=source&distro=bionic

Affected ranges

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

Affected versions

1.*
1.4.0-0ubuntu2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "bandit",
            "binary_version":  "1.4.0-0ubuntu2"
        },
        {
            "binary_name":  "python-bandit",
            "binary_version":  "1.4.0-0ubuntu2"
        },
        {
            "binary_name":  "python3-bandit",
            "binary_version":  "1.4.0-0ubuntu2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-113436.json"
Ubuntu:20.04:LTS
bandit

Package

Name
bandit
Purl
pkg:deb/ubuntu/bandit?arch=source&distro=focal

Affected ranges

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

Affected versions

1.*
1.5.1-3
1.6.2-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "bandit",
            "binary_version":  "1.6.2-1"
        },
        {
            "binary_name":  "python3-bandit",
            "binary_version":  "1.6.2-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-113436.json"
Ubuntu:22.04:LTS
bandit

Package

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

Affected ranges

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

Affected versions

1.*
1.6.2-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "bandit",
            "binary_version":  "1.6.2-1"
        },
        {
            "binary_name":  "python3-bandit",
            "binary_version":  "1.6.2-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-113436.json"
Ubuntu:24.04:LTS
bandit

Package

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

Affected ranges

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

Affected versions

1.*
1.6.2-3

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "bandit",
            "binary_version":  "1.6.2-3"
        },
        {
            "binary_name":  "python3-bandit",
            "binary_version":  "1.6.2-3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-113436.json"
Ubuntu:26.04:LTS
bandit

Package

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

Affected ranges

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

Affected versions

1.*
1.7.10-2
1.7.10-3

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "bandit",
            "binary_version":  "1.7.10-3"
        },
        {
            "binary_name":  "python3-bandit",
            "binary_version":  "1.7.10-3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-113436.json"
Ubuntu:26.10
bandit

Package

Name
bandit
Purl
pkg:deb/ubuntu/bandit?arch=source&distro=stonking

Affected ranges

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

Affected versions

1.*
1.7.10-3
1.9.4-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "bandit",
            "binary_version":  "1.9.4-1"
        },
        {
            "binary_name":  "python3-bandit",
            "binary_version":  "1.9.4-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-113436.json"