UBUNTU-CVE-2026-34356

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Source

https://ubuntu.com/security/CVE-2026-34356

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34356.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-34356

Upstream

CVE-2026-34356

Published

2026-06-08T16:16:00Z

Modified

2026-06-11T13:04:26Z

Severity

7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

Heap-based Buffer Overflow vulnerability in Apache HTTP Server with malicious backend servers and ProxyPassReverseCookie* This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67. Users are recommended to upgrade to version 2.4.68, which fixes the 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

0Unknown 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

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "2.4.52-1ubuntu4.21",
            "binary_name": "apache2"
        },
        {
            "binary_version": "2.4.52-1ubuntu4.21",
            "binary_name": "apache2-bin"
        },
        {
            "binary_version": "2.4.52-1ubuntu4.21",
            "binary_name": "apache2-data"
        },
        {
            "binary_version": "2.4.52-1ubuntu4.21",
            "binary_name": "apache2-suexec-custom"
        },
        {
            "binary_version": "2.4.52-1ubuntu4.21",
            "binary_name": "apache2-suexec-pristine"
        },
        {
            "binary_version": "2.4.52-1ubuntu4.21",
            "binary_name": "apache2-utils"
        },
        {
            "binary_version": "2.4.52-1ubuntu4.21",
            "binary_name": "libapache2-mod-md"
        },
        {
            "binary_version": "2.4.52-1ubuntu4.21",
            "binary_name": "libapache2-mod-proxy-uwsgi"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34356.json"

Ubuntu:24.04:LTS

apache2

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown 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

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "2.4.58-1ubuntu8.13",
            "binary_name": "apache2"
        },
        {
            "binary_version": "2.4.58-1ubuntu8.13",
            "binary_name": "apache2-bin"
        },
        {
            "binary_version": "2.4.58-1ubuntu8.13",
            "binary_name": "apache2-data"
        },
        {
            "binary_version": "2.4.58-1ubuntu8.13",
            "binary_name": "apache2-suexec-custom"
        },
        {
            "binary_version": "2.4.58-1ubuntu8.13",
            "binary_name": "apache2-suexec-pristine"
        },
        {
            "binary_version": "2.4.58-1ubuntu8.13",
            "binary_name": "apache2-utils"
        },
        {
            "binary_version": "2.4.58-1ubuntu8.13",
            "binary_name": "libapache2-mod-md"
        },
        {
            "binary_version": "2.4.58-1ubuntu8.13",
            "binary_name": "libapache2-mod-proxy-uwsgi"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34356.json"

Ubuntu:25.10

apache2

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.4.63-1ubuntu1

2.4.63-1ubuntu3

2.4.64-1ubuntu2

2.4.64-1ubuntu3

2.4.64-1ubuntu3.2

2.4.64-1ubuntu3.3

2.4.64-1ubuntu3.4

2.4.64-1ubuntu3.5

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "2.4.64-1ubuntu3.5",
            "binary_name": "apache2"
        },
        {
            "binary_version": "2.4.64-1ubuntu3.5",
            "binary_name": "apache2-bin"
        },
        {
            "binary_version": "2.4.64-1ubuntu3.5",
            "binary_name": "apache2-data"
        },
        {
            "binary_version": "2.4.64-1ubuntu3.5",
            "binary_name": "apache2-suexec-custom"
        },
        {
            "binary_version": "2.4.64-1ubuntu3.5",
            "binary_name": "apache2-suexec-pristine"
        },
        {
            "binary_version": "2.4.64-1ubuntu3.5",
            "binary_name": "apache2-utils"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34356.json"

Ubuntu:26.04:LTS

apache2

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown 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

Ecosystem specific

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

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34356.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

0Unknown 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

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "2.4.7-1ubuntu4.22+esm13",
            "binary_name": "apache2"
        },
        {
            "binary_version": "2.4.7-1ubuntu4.22+esm13",
            "binary_name": "apache2-bin"
        },
        {
            "binary_version": "2.4.7-1ubuntu4.22+esm13",
            "binary_name": "apache2-data"
        },
        {
            "binary_version": "2.4.7-1ubuntu4.22+esm13",
            "binary_name": "apache2-mpm-event"
        },
        {
            "binary_version": "2.4.7-1ubuntu4.22+esm13",
            "binary_name": "apache2-mpm-itk"
        },
        {
            "binary_version": "2.4.7-1ubuntu4.22+esm13",
            "binary_name": "apache2-mpm-prefork"
        },
        {
            "binary_version": "2.4.7-1ubuntu4.22+esm13",
            "binary_name": "apache2-mpm-worker"
        },
        {
            "binary_version": "2.4.7-1ubuntu4.22+esm13",
            "binary_name": "apache2-suexec"
        },
        {
            "binary_version": "2.4.7-1ubuntu4.22+esm13",
            "binary_name": "apache2-suexec-custom"
        },
        {
            "binary_version": "2.4.7-1ubuntu4.22+esm13",
            "binary_name": "apache2-suexec-pristine"
        },
        {
            "binary_version": "2.4.7-1ubuntu4.22+esm13",
            "binary_name": "apache2-utils"
        },
        {
            "binary_version": "2.4.7-1ubuntu4.22+esm13",
            "binary_name": "apache2.2-bin"
        },
        {
            "binary_version": "1:2.4.7-1ubuntu4.22+esm13",
            "binary_name": "libapache2-mod-macro"
        },
        {
            "binary_version": "1:2.4.7-1ubuntu4.22+esm13",
            "binary_name": "libapache2-mod-proxy-html"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34356.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

0Unknown 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

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "2.4.18-2ubuntu3.17+esm18",
            "binary_name": "apache2"
        },
        {
            "binary_version": "2.4.18-2ubuntu3.17+esm18",
            "binary_name": "apache2-bin"
        },
        {
            "binary_version": "2.4.18-2ubuntu3.17+esm18",
            "binary_name": "apache2-data"
        },
        {
            "binary_version": "2.4.18-2ubuntu3.17+esm18",
            "binary_name": "apache2-suexec-custom"
        },
        {
            "binary_version": "2.4.18-2ubuntu3.17+esm18",
            "binary_name": "apache2-suexec-pristine"
        },
        {
            "binary_version": "2.4.18-2ubuntu3.17+esm18",
            "binary_name": "apache2-utils"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34356.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

0Unknown 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

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "2.4.29-1ubuntu4.27+esm9",
            "binary_name": "apache2"
        },
        {
            "binary_version": "2.4.29-1ubuntu4.27+esm9",
            "binary_name": "apache2-bin"
        },
        {
            "binary_version": "2.4.29-1ubuntu4.27+esm9",
            "binary_name": "apache2-data"
        },
        {
            "binary_version": "2.4.29-1ubuntu4.27+esm9",
            "binary_name": "apache2-suexec-custom"
        },
        {
            "binary_version": "2.4.29-1ubuntu4.27+esm9",
            "binary_name": "apache2-suexec-pristine"
        },
        {
            "binary_version": "2.4.29-1ubuntu4.27+esm9",
            "binary_name": "apache2-utils"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34356.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

0Unknown 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

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "2.4.41-4ubuntu3.23+esm4",
            "binary_name": "apache2"
        },
        {
            "binary_version": "2.4.41-4ubuntu3.23+esm4",
            "binary_name": "apache2-bin"
        },
        {
            "binary_version": "2.4.41-4ubuntu3.23+esm4",
            "binary_name": "apache2-data"
        },
        {
            "binary_version": "2.4.41-4ubuntu3.23+esm4",
            "binary_name": "apache2-suexec-custom"
        },
        {
            "binary_version": "2.4.41-4ubuntu3.23+esm4",
            "binary_name": "apache2-suexec-pristine"
        },
        {
            "binary_version": "2.4.41-4ubuntu3.23+esm4",
            "binary_name": "apache2-utils"
        },
        {
            "binary_version": "2.4.41-4ubuntu3.23+esm4",
            "binary_name": "libapache2-mod-md"
        },
        {
            "binary_version": "2.4.41-4ubuntu3.23+esm4",
            "binary_name": "libapache2-mod-proxy-uwsgi"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34356.json"