UBUNTU-CVE-2026-113431

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Source
https://ubuntu.com/security/CVE-2026-113431
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-113431.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-113431
Upstream
Published
2026-11-09T00:00:00Z
Modified
2026-11-10T02:50:21Z
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
  • Ubuntu - medium
Summary
[none]
Details

Allocation of Resources Without Limits or Throttling vulnerability in ninenines cowlib allows an unauthenticated remote peer to exhaust the memory of an HTTP/2 endpoint via HPACK-indexed header fields. cow_http2_machine:headers_decode/4 in src/cow_http2_machine.erl decodes every HEADERS block with cow_hpack:decode/3. It bounds the compressed block size and the number of fields, but not the size of the decoded header list that RFC 9113 section 6.5.2 places under SETTINGS_MAX_HEADER_LIST_SIZE. A peer stores one header value of up to the dynamic table size (4096 bytes by default) and then references it with one-byte indexed fields, so about 100 bytes on the wire decode to a header list of about 390 KB. A consumer that copies the decoded values, as Cowboy does when cowboy_http2:headers_to_map/2 joins repeated cookie fields into one binary, allocates that amount for every stream. The total across streams and connections is not bounded. This issue affects cowlib: from 2.7.0 onward.

References

Affected packages

Ubuntu:16.04:LTS
erlang-cowlib

Package

Name
erlang-cowlib
Purl
pkg:deb/ubuntu/erlang-cowlib?arch=source&distro=xenial

Affected ranges

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

Affected versions

1.*
1.3.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "erlang-cowlib",
            "binary_version": "1.3.0-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-113431.json"
Ubuntu:18.04:LTS
erlang-cowlib

Package

Name
erlang-cowlib
Purl
pkg:deb/ubuntu/erlang-cowlib?arch=source&distro=bionic

Affected ranges

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

Affected versions

1.*
1.3.0-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "erlang-cowlib",
            "binary_version": "1.3.0-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-113431.json"
Ubuntu:20.04:LTS
erlang-cowlib

Package

Name
erlang-cowlib
Purl
pkg:deb/ubuntu/erlang-cowlib?arch=source&distro=focal

Affected ranges

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

Affected versions

1.*
1.3.0-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "erlang-cowlib",
            "binary_version": "1.3.0-3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-113431.json"
Ubuntu:22.04:LTS
erlang-cowlib

Package

Name
erlang-cowlib
Purl
pkg:deb/ubuntu/erlang-cowlib?arch=source&distro=jammy

Affected ranges

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

Affected versions

1.*
1.3.0-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "erlang-cowlib",
            "binary_version": "1.3.0-3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-113431.json"
Ubuntu:24.04:LTS
erlang-cowlib

Package

Name
erlang-cowlib
Purl
pkg:deb/ubuntu/erlang-cowlib?arch=source&distro=noble

Affected ranges

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

Affected versions

1.*
1.3.0-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "erlang-cowlib",
            "binary_version": "1.3.0-3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-113431.json"
Ubuntu:26.04:LTS
erlang-cowlib

Package

Name
erlang-cowlib
Purl
pkg:deb/ubuntu/erlang-cowlib?arch=source&distro=resolute

Affected ranges

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

Affected versions

1.*
1.3.0-3
1.3.0-3build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "erlang-cowlib",
            "binary_version": "1.3.0-3build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-113431.json"
Ubuntu:26.10
erlang-cowlib

Package

Name
erlang-cowlib
Purl
pkg:deb/ubuntu/erlang-cowlib?arch=source&distro=stonking

Affected ranges

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

Affected versions

1.*
1.3.0-3build1
2.*
2.19.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "erlang-cowlib",
            "binary_version": "2.19.0-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-113431.json"