UBUNTU-CVE-2026-65624

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2026-65624
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-65624.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-65624
Upstream
Published
2026-07-28T10:16:00Z
Modified
2026-08-06T03:11:24Z
Severity
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Allocation of Resources Without Limits or Throttling vulnerability in ninenines cowboy allows an unauthenticated remote attacker to exhaust connection process memory over HTTP/1.1. The HTTP/1.1 handler in cowboy_http enforces the max_headers limit by counting the number of distinct header names in a map (maps:size(Headers)). When a request contains multiple header lines with the same name, the values are concatenated into a single ever-growing binary stored under that one map key (", " for regular headers, "; " for cookies), so the map size stays at one and the max_headers cap (default 100) is never reached. Because no accumulator bounds the total number of header lines or the total byte size of the header block (only per-line max_header_name_length and max_header_value_length apply), an unauthenticated client can send an arbitrary number of header lines with the same name and grow the connection process's binary memory to arbitrary size within the request window. The impact per connection is bounded by request_timeout (default 5 seconds, not reset by header data), and by max_heap_size when set (the offending connection process is killed once its heap grows past the limit). When max_heap_size is left at the default (unset), sustained abuse can drive the Erlang VM into out-of-memory conditions. This issue affects cowboy from 2.0.0-pre.4 before 2.18.0.

References

Affected packages

Ubuntu:16.04:LTS
erlang-cowboy

Package

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

Affected ranges

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

Affected versions

2.*
2.0.0~pre.1+dfsg1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "erlang-cowboy",
            "binary_version": "2.0.0~pre.1+dfsg1-1"
        },
        {
            "binary_name": "erlang-cowboy-examples",
            "binary_version": "2.0.0~pre.1+dfsg1-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-65624.json"
Ubuntu:18.04:LTS
rabbitmq-server

Package

Name
rabbitmq-server
Purl
pkg:deb/ubuntu/rabbitmq-server?arch=source&distro=bionic

Affected ranges

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

Affected versions

3.*
3.6.10-1
3.6.10-1ubuntu0.1
3.6.10-1ubuntu0.3
3.6.10-1ubuntu0.4
3.6.10-1ubuntu0.5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "rabbitmq-server",
            "binary_version": "3.6.10-1ubuntu0.5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-65624.json"
erlang-cowboy

Package

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

Affected ranges

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

Affected versions

2.*
2.0.0~pre.1+dfsg1-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "erlang-cowboy",
            "binary_version": "2.0.0~pre.1+dfsg1-2"
        },
        {
            "binary_name": "erlang-cowboy-examples",
            "binary_version": "2.0.0~pre.1+dfsg1-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-65624.json"
Ubuntu:20.04:LTS
rabbitmq-server

Package

Name
rabbitmq-server
Purl
pkg:deb/ubuntu/rabbitmq-server?arch=source&distro=focal

Affected ranges

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

Affected versions

3.*
3.7.8-4ubuntu2
3.7.18-1
3.8.2-0ubuntu1
3.8.2-0ubuntu1.1
3.8.2-0ubuntu1.2
3.8.2-0ubuntu1.3
3.8.2-0ubuntu1.4
3.8.2-0ubuntu1.5
3.8.3-0ubuntu0.1
3.8.3-0ubuntu0.2
3.8.3-0ubuntu0.3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "rabbitmq-server",
            "binary_version": "3.8.3-0ubuntu0.3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-65624.json"
erlang-cowboy

Package

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

Affected ranges

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

Affected versions

2.*
2.0.0~pre.1+dfsg1-4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "erlang-cowboy",
            "binary_version": "2.0.0~pre.1+dfsg1-4"
        },
        {
            "binary_name": "erlang-cowboy-examples",
            "binary_version": "2.0.0~pre.1+dfsg1-4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-65624.json"
Ubuntu:22.04:LTS
erlang-cowboy

Package

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

Affected ranges

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

Affected versions

2.*
2.0.0~pre.1+dfsg1-4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "erlang-cowboy",
            "binary_version": "2.0.0~pre.1+dfsg1-4"
        },
        {
            "binary_name": "erlang-cowboy-examples",
            "binary_version": "2.0.0~pre.1+dfsg1-4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-65624.json"
rabbitmq-server

Package

Name
rabbitmq-server
Purl
pkg:deb/ubuntu/rabbitmq-server?arch=source&distro=jammy

Affected ranges

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

Affected versions

3.*
3.8.9-3ubuntu1
3.9.8-1
3.9.8-2
3.9.8-3
3.9.8-5
3.9.8-6
3.9.13-1
3.9.13-1ubuntu0.22.04.1
3.9.13-1ubuntu0.22.04.2
3.9.27-0ubuntu0.1
3.9.27-0ubuntu0.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "rabbitmq-server",
            "binary_version": "3.9.27-0ubuntu0.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-65624.json"
Ubuntu:24.04:LTS
erlang-cowboy

Package

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

Affected ranges

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

Affected versions

2.*
2.0.0~pre.1+dfsg1-4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "erlang-cowboy",
            "binary_version": "2.0.0~pre.1+dfsg1-4"
        },
        {
            "binary_name": "erlang-cowboy-examples",
            "binary_version": "2.0.0~pre.1+dfsg1-4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-65624.json"
rabbitmq-server

Package

Name
rabbitmq-server
Purl
pkg:deb/ubuntu/rabbitmq-server?arch=source&distro=noble

Affected ranges

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

Affected versions

3.*
3.12.1-1
3.12.1-1ubuntu1
3.12.1-1ubuntu1.2
3.12.1-1ubuntu1.4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "rabbitmq-server",
            "binary_version": "3.12.1-1ubuntu1.4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-65624.json"
Ubuntu:26.04:LTS
erlang-cowboy

Package

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

Affected ranges

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

Affected versions

2.*
2.0.0~pre.1+dfsg1-4
2.0.0~pre.1+dfsg1-4build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "erlang-cowboy",
            "binary_version": "2.0.0~pre.1+dfsg1-4build1"
        },
        {
            "binary_name": "erlang-cowboy-examples",
            "binary_version": "2.0.0~pre.1+dfsg1-4build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-65624.json"
rabbitmq-server

Package

Name
rabbitmq-server
Purl
pkg:deb/ubuntu/rabbitmq-server?arch=source&distro=resolute

Affected ranges

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

Affected versions

4.*
4.0.5-8ubuntu2
4.0.5-10ubuntu1
4.0.5-10ubuntu2
4.0.5-10ubuntu3
4.0.5-10ubuntu4
4.0.5-10ubuntu5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "rabbitmq-server",
            "binary_version": "4.0.5-10ubuntu5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-65624.json"
Ubuntu:Pro:16.04:LTS
rabbitmq-server

Package

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

Affected ranges

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

Affected versions

3.*
3.5.4-1
3.5.4-3
3.5.4-3.1
3.5.7-1
3.5.7-1ubuntu0.16.04.1
3.5.7-1ubuntu0.16.04.2
3.5.7-1ubuntu0.16.04.4
3.5.7-1ubuntu0.16.04.4+esm1
3.5.7-1ubuntu0.16.04.4+esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "rabbitmq-server",
            "binary_version": "3.5.7-1ubuntu0.16.04.4+esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-65624.json"