UBUNTU-CVE-2026-73637

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Source
https://ubuntu.com/security/CVE-2026-73637
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73637.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-73637
Upstream
  • CVE-2026-73637
Published
2026-10-02T00:00:00Z
Modified
2026-10-02T22:30:28Z
Severity
  • 7.3 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Use after free in mod_auth_digest in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an unauthenticated remote client to cause authentication state corruption via concurrent Digest authentication requests when AuthDigestNcCheck is enabled or AuthDigestNonceLifetime is set to 0. Users are recommended to upgrade to version 2.4.69, which fixes this issue.

References

Affected packages

Ubuntu:22.04:LTS
apache2

Package

Name
apache2
Purl
pkg:deb/ubuntu/apache2?arch=source&distro=jammy

Affected ranges

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

Affected versions

2.*
2.4.48-3.1ubuntu3
2.4.48-3.1ubuntu4
2.4.51-2ubuntu1
2.4.52-1ubuntu1
2.4.52-1ubuntu2
2.4.52-1ubuntu4
2.4.52-1ubuntu4.1
2.4.52-1ubuntu4.2
2.4.52-1ubuntu4.3
2.4.52-1ubuntu4.4
2.4.52-1ubuntu4.5
2.4.52-1ubuntu4.6
2.4.52-1ubuntu4.7
2.4.52-1ubuntu4.8
2.4.52-1ubuntu4.9
2.4.52-1ubuntu4.10
2.4.52-1ubuntu4.11
2.4.52-1ubuntu4.12
2.4.52-1ubuntu4.13
2.4.52-1ubuntu4.14
2.4.52-1ubuntu4.15
2.4.52-1ubuntu4.16
2.4.52-1ubuntu4.18
2.4.52-1ubuntu4.19
2.4.52-1ubuntu4.20
2.4.52-1ubuntu4.21
2.4.52-1ubuntu4.23

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "apache2",
            "binary_version":  "2.4.52-1ubuntu4.23"
        },
        {
            "binary_name":  "apache2-bin",
            "binary_version":  "2.4.52-1ubuntu4.23"
        },
        {
            "binary_name":  "apache2-data",
            "binary_version":  "2.4.52-1ubuntu4.23"
        },
        {
            "binary_name":  "apache2-suexec-custom",
            "binary_version":  "2.4.52-1ubuntu4.23"
        },
        {
            "binary_name":  "apache2-suexec-pristine",
            "binary_version":  "2.4.52-1ubuntu4.23"
        },
        {
            "binary_name":  "apache2-utils",
            "binary_version":  "2.4.52-1ubuntu4.23"
        },
        {
            "binary_name":  "libapache2-mod-md",
            "binary_version":  "2.4.52-1ubuntu4.23"
        },
        {
            "binary_name":  "libapache2-mod-proxy-uwsgi",
            "binary_version":  "2.4.52-1ubuntu4.23"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73637.json"
Ubuntu:24.04:LTS
apache2

Package

Name
apache2
Purl
pkg:deb/ubuntu/apache2?arch=source&distro=noble

Affected ranges

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

Affected versions

2.*
2.4.57-2ubuntu2
2.4.57-2ubuntu3
2.4.58-1ubuntu1
2.4.58-1ubuntu2
2.4.58-1ubuntu6
2.4.58-1ubuntu7
2.4.58-1ubuntu8
2.4.58-1ubuntu8.1
2.4.58-1ubuntu8.2
2.4.58-1ubuntu8.3
2.4.58-1ubuntu8.4
2.4.58-1ubuntu8.5
2.4.58-1ubuntu8.6
2.4.58-1ubuntu8.7
2.4.58-1ubuntu8.8
2.4.58-1ubuntu8.10
2.4.58-1ubuntu8.11
2.4.58-1ubuntu8.12
2.4.58-1ubuntu8.13
2.4.58-1ubuntu8.15

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "apache2",
            "binary_version":  "2.4.58-1ubuntu8.15"
        },
        {
            "binary_name":  "apache2-bin",
            "binary_version":  "2.4.58-1ubuntu8.15"
        },
        {
            "binary_name":  "apache2-data",
            "binary_version":  "2.4.58-1ubuntu8.15"
        },
        {
            "binary_name":  "apache2-suexec-custom",
            "binary_version":  "2.4.58-1ubuntu8.15"
        },
        {
            "binary_name":  "apache2-suexec-pristine",
            "binary_version":  "2.4.58-1ubuntu8.15"
        },
        {
            "binary_name":  "apache2-utils",
            "binary_version":  "2.4.58-1ubuntu8.15"
        },
        {
            "binary_name":  "libapache2-mod-md",
            "binary_version":  "2.4.58-1ubuntu8.15"
        },
        {
            "binary_name":  "libapache2-mod-proxy-uwsgi",
            "binary_version":  "2.4.58-1ubuntu8.15"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73637.json"
Ubuntu:26.04:LTS
apache2

Package

Name
apache2
Purl
pkg:deb/ubuntu/apache2?arch=source&distro=resolute

Affected ranges

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

Affected versions

2.*
2.4.64-1ubuntu3
2.4.65-3ubuntu1
2.4.66-2ubuntu1
2.4.66-2ubuntu2
2.4.66-2ubuntu2.1
2.4.66-2ubuntu2.2
2.4.66-2ubuntu2.4

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "apache2",
            "binary_version":  "2.4.66-2ubuntu2.4"
        },
        {
            "binary_name":  "apache2-bin",
            "binary_version":  "2.4.66-2ubuntu2.4"
        },
        {
            "binary_name":  "apache2-data",
            "binary_version":  "2.4.66-2ubuntu2.4"
        },
        {
            "binary_name":  "apache2-suexec-custom",
            "binary_version":  "2.4.66-2ubuntu2.4"
        },
        {
            "binary_name":  "apache2-suexec-pristine",
            "binary_version":  "2.4.66-2ubuntu2.4"
        },
        {
            "binary_name":  "apache2-utils",
            "binary_version":  "2.4.66-2ubuntu2.4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73637.json"
Ubuntu:Pro:14.04:LTS
apache2

Package

Name
apache2
Purl
pkg:deb/ubuntu/apache2?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

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

Affected versions

2.*
2.4.6-2ubuntu2
2.4.6-2ubuntu3
2.4.6-2ubuntu4
2.4.7-1ubuntu1
2.4.7-1ubuntu2
2.4.7-1ubuntu3
2.4.7-1ubuntu4
2.4.7-1ubuntu4.1
2.4.7-1ubuntu4.4
2.4.7-1ubuntu4.5
2.4.7-1ubuntu4.6
2.4.7-1ubuntu4.7
2.4.7-1ubuntu4.8
2.4.7-1ubuntu4.9
2.4.7-1ubuntu4.10
2.4.7-1ubuntu4.11
2.4.7-1ubuntu4.13
2.4.7-1ubuntu4.15
2.4.7-1ubuntu4.16
2.4.7-1ubuntu4.17
2.4.7-1ubuntu4.18
2.4.7-1ubuntu4.19
2.4.7-1ubuntu4.20
2.4.7-1ubuntu4.21
2.4.7-1ubuntu4.22
2.4.7-1ubuntu4.22+esm1
2.4.7-1ubuntu4.22+esm2
2.4.7-1ubuntu4.22+esm3
2.4.7-1ubuntu4.22+esm4
2.4.7-1ubuntu4.22+esm5
2.4.7-1ubuntu4.22+esm6
2.4.7-1ubuntu4.22+esm8
2.4.7-1ubuntu4.22+esm9
2.4.7-1ubuntu4.22+esm10
2.4.7-1ubuntu4.22+esm12
2.4.7-1ubuntu4.22+esm13
2.4.7-1ubuntu4.22+esm14
2.4.7-1ubuntu4.22+esm15

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "apache2",
            "binary_version":  "2.4.7-1ubuntu4.22+esm15"
        },
        {
            "binary_name":  "apache2-bin",
            "binary_version":  "2.4.7-1ubuntu4.22+esm15"
        },
        {
            "binary_name":  "apache2-data",
            "binary_version":  "2.4.7-1ubuntu4.22+esm15"
        },
        {
            "binary_name":  "apache2-mpm-event",
            "binary_version":  "2.4.7-1ubuntu4.22+esm15"
        },
        {
            "binary_name":  "apache2-mpm-itk",
            "binary_version":  "2.4.7-1ubuntu4.22+esm15"
        },
        {
            "binary_name":  "apache2-mpm-prefork",
            "binary_version":  "2.4.7-1ubuntu4.22+esm15"
        },
        {
            "binary_name":  "apache2-mpm-worker",
            "binary_version":  "2.4.7-1ubuntu4.22+esm15"
        },
        {
            "binary_name":  "apache2-suexec",
            "binary_version":  "2.4.7-1ubuntu4.22+esm15"
        },
        {
            "binary_name":  "apache2-suexec-custom",
            "binary_version":  "2.4.7-1ubuntu4.22+esm15"
        },
        {
            "binary_name":  "apache2-suexec-pristine",
            "binary_version":  "2.4.7-1ubuntu4.22+esm15"
        },
        {
            "binary_name":  "apache2-utils",
            "binary_version":  "2.4.7-1ubuntu4.22+esm15"
        },
        {
            "binary_name":  "apache2.2-bin",
            "binary_version":  "2.4.7-1ubuntu4.22+esm15"
        },
        {
            "binary_name":  "libapache2-mod-macro",
            "binary_version":  "1:2.4.7-1ubuntu4.22+esm15"
        },
        {
            "binary_name":  "libapache2-mod-proxy-html",
            "binary_version":  "1:2.4.7-1ubuntu4.22+esm15"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73637.json"
Ubuntu:Pro:16.04:LTS
apache2

Package

Name
apache2
Purl
pkg:deb/ubuntu/apache2?arch=source&distro=esm-infra-legacy%2Fxenial

Affected ranges

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

Affected versions

2.*
2.4.12-2ubuntu2
2.4.17-1ubuntu1
2.4.17-2ubuntu1
2.4.17-3ubuntu1
2.4.18-1ubuntu1
2.4.18-2ubuntu1
2.4.18-2ubuntu2
2.4.18-2ubuntu3
2.4.18-2ubuntu3.1
2.4.18-2ubuntu3.2
2.4.18-2ubuntu3.3
2.4.18-2ubuntu3.4
2.4.18-2ubuntu3.5
2.4.18-2ubuntu3.7
2.4.18-2ubuntu3.8
2.4.18-2ubuntu3.9
2.4.18-2ubuntu3.10
2.4.18-2ubuntu3.12
2.4.18-2ubuntu3.13
2.4.18-2ubuntu3.14
2.4.18-2ubuntu3.15
2.4.18-2ubuntu3.17
2.4.18-2ubuntu3.17+esm1
2.4.18-2ubuntu3.17+esm2
2.4.18-2ubuntu3.17+esm3
2.4.18-2ubuntu3.17+esm4
2.4.18-2ubuntu3.17+esm5
2.4.18-2ubuntu3.17+esm6
2.4.18-2ubuntu3.17+esm7
2.4.18-2ubuntu3.17+esm8
2.4.18-2ubuntu3.17+esm9
2.4.18-2ubuntu3.17+esm10
2.4.18-2ubuntu3.17+esm11
2.4.18-2ubuntu3.17+esm12
2.4.18-2ubuntu3.17+esm13
2.4.18-2ubuntu3.17+esm14
2.4.18-2ubuntu3.17+esm16
2.4.18-2ubuntu3.17+esm17
2.4.18-2ubuntu3.17+esm18
2.4.18-2ubuntu3.17+esm19
2.4.18-2ubuntu3.17+esm20

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "apache2",
            "binary_version":  "2.4.18-2ubuntu3.17+esm20"
        },
        {
            "binary_name":  "apache2-bin",
            "binary_version":  "2.4.18-2ubuntu3.17+esm20"
        },
        {
            "binary_name":  "apache2-data",
            "binary_version":  "2.4.18-2ubuntu3.17+esm20"
        },
        {
            "binary_name":  "apache2-suexec-custom",
            "binary_version":  "2.4.18-2ubuntu3.17+esm20"
        },
        {
            "binary_name":  "apache2-suexec-pristine",
            "binary_version":  "2.4.18-2ubuntu3.17+esm20"
        },
        {
            "binary_name":  "apache2-utils",
            "binary_version":  "2.4.18-2ubuntu3.17+esm20"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73637.json"
Ubuntu:Pro:18.04:LTS
apache2

Package

Name
apache2
Purl
pkg:deb/ubuntu/apache2?arch=source&distro=esm-infra%2Fbionic

Affected ranges

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

Affected versions

2.*
2.4.27-2ubuntu3
2.4.29-1ubuntu1
2.4.29-1ubuntu2
2.4.29-1ubuntu3
2.4.29-1ubuntu4
2.4.29-1ubuntu4.1
2.4.29-1ubuntu4.2
2.4.29-1ubuntu4.3
2.4.29-1ubuntu4.4
2.4.29-1ubuntu4.5
2.4.29-1ubuntu4.6
2.4.29-1ubuntu4.7
2.4.29-1ubuntu4.8
2.4.29-1ubuntu4.10
2.4.29-1ubuntu4.11
2.4.29-1ubuntu4.12
2.4.29-1ubuntu4.13
2.4.29-1ubuntu4.14
2.4.29-1ubuntu4.16
2.4.29-1ubuntu4.17
2.4.29-1ubuntu4.18
2.4.29-1ubuntu4.19
2.4.29-1ubuntu4.20
2.4.29-1ubuntu4.21
2.4.29-1ubuntu4.22
2.4.29-1ubuntu4.23
2.4.29-1ubuntu4.24
2.4.29-1ubuntu4.25
2.4.29-1ubuntu4.26
2.4.29-1ubuntu4.27
2.4.29-1ubuntu4.27+esm1
2.4.29-1ubuntu4.27+esm2
2.4.29-1ubuntu4.27+esm3
2.4.29-1ubuntu4.27+esm4
2.4.29-1ubuntu4.27+esm6
2.4.29-1ubuntu4.27+esm7
2.4.29-1ubuntu4.27+esm8
2.4.29-1ubuntu4.27+esm9
2.4.29-1ubuntu4.27+esm10
2.4.29-1ubuntu4.27+esm11

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "apache2",
            "binary_version":  "2.4.29-1ubuntu4.27+esm11"
        },
        {
            "binary_name":  "apache2-bin",
            "binary_version":  "2.4.29-1ubuntu4.27+esm11"
        },
        {
            "binary_name":  "apache2-data",
            "binary_version":  "2.4.29-1ubuntu4.27+esm11"
        },
        {
            "binary_name":  "apache2-suexec-custom",
            "binary_version":  "2.4.29-1ubuntu4.27+esm11"
        },
        {
            "binary_name":  "apache2-suexec-pristine",
            "binary_version":  "2.4.29-1ubuntu4.27+esm11"
        },
        {
            "binary_name":  "apache2-utils",
            "binary_version":  "2.4.29-1ubuntu4.27+esm11"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73637.json"
Ubuntu:Pro:20.04:LTS
apache2

Package

Name
apache2
Purl
pkg:deb/ubuntu/apache2?arch=source&distro=esm-infra%2Ffocal

Affected ranges

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

Affected versions

2.*
2.4.41-1ubuntu1
2.4.41-4ubuntu1
2.4.41-4ubuntu2
2.4.41-4ubuntu3
2.4.41-4ubuntu3.1
2.4.41-4ubuntu3.3
2.4.41-4ubuntu3.4
2.4.41-4ubuntu3.5
2.4.41-4ubuntu3.6
2.4.41-4ubuntu3.7
2.4.41-4ubuntu3.8
2.4.41-4ubuntu3.9
2.4.41-4ubuntu3.10
2.4.41-4ubuntu3.11
2.4.41-4ubuntu3.12
2.4.41-4ubuntu3.13
2.4.41-4ubuntu3.14
2.4.41-4ubuntu3.15
2.4.41-4ubuntu3.16
2.4.41-4ubuntu3.17
2.4.41-4ubuntu3.19
2.4.41-4ubuntu3.20
2.4.41-4ubuntu3.21
2.4.41-4ubuntu3.23
2.4.41-4ubuntu3.23+esm2
2.4.41-4ubuntu3.23+esm3
2.4.41-4ubuntu3.23+esm4
2.4.41-4ubuntu3.23+esm5
2.4.41-4ubuntu3.23+esm6
2.4.41-4ubuntu3.23+esm7

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "apache2",
            "binary_version":  "2.4.41-4ubuntu3.23+esm7"
        },
        {
            "binary_name":  "apache2-bin",
            "binary_version":  "2.4.41-4ubuntu3.23+esm7"
        },
        {
            "binary_name":  "apache2-data",
            "binary_version":  "2.4.41-4ubuntu3.23+esm7"
        },
        {
            "binary_name":  "apache2-suexec-custom",
            "binary_version":  "2.4.41-4ubuntu3.23+esm7"
        },
        {
            "binary_name":  "apache2-suexec-pristine",
            "binary_version":  "2.4.41-4ubuntu3.23+esm7"
        },
        {
            "binary_name":  "apache2-utils",
            "binary_version":  "2.4.41-4ubuntu3.23+esm7"
        },
        {
            "binary_name":  "libapache2-mod-md",
            "binary_version":  "2.4.41-4ubuntu3.23+esm7"
        },
        {
            "binary_name":  "libapache2-mod-proxy-uwsgi",
            "binary_version":  "2.4.41-4ubuntu3.23+esm7"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73637.json"