UBUNTU-CVE-2026-110499

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Source
https://ubuntu.com/security/CVE-2026-110499
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-110499.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-110499
Upstream
Published
2026-10-26T14:16:00Z
Modified
2026-10-28T20:17:05Z
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

Allocation of Resources Without Limits or Throttling vulnerability in the HTTP/2 implementation of mtrudel bandit allows an unauthenticated remote attacker to grow per-connection memory and CPU cost without bound via a large SETTINGS_HEADER_TABLE_SIZE. Bandit resizes its HPACK encoder table to whatever size the client advertises, up to 2^32-1 bytes, and indexes response headers into it. Because responses carry distinct values such as date or content-length, nothing is evicted and the table grows with every response for the life of the connection, while each lookup scans it linearly. The SETTINGS handling in Bandit.HTTP2.Connection (lib/bandit/http2/connection.ex) passes remote_settings.header_table_size to HPAX.resize/2 with no server-side cap, and encode_headers encodes every response header as :store. Serving N responses on one connection therefore costs O(N²) CPU in the connection process. This issue affects bandit: from 0.3.6 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-2026-110499.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-2026-110499.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-2026-110499.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-2026-110499.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-2026-110499.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-2026-110499.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-2026-110499.json"