UBUNTU-CVE-2026-7666

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Source

https://ubuntu.com/security/CVE-2026-7666

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-7666.json

JSON Data

https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-7666

Upstream

CVE-2026-7666

Published

2026-06-03T13:00:00Z

Modified

2026-06-12T09:12:15.231036898Z

Severity

3.1 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N CVSS Calculator
2.3 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Ubuntu - low

Summary

[none]

Details

An issue was discovered in Django 6.0 before 6.0.6 and 5.2 before 5.2.15. django.core.mail.backends.smtp.EmailBackend in Django fails to prevent reuse of a partially-initialized connection after a failed STARTTLS handshake when fail_silently=True, which allows on-path network attackers to read email content via cleartext interception. Earlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected. Django would like to thank Kasper Dupont for reporting this issue.

References

Affected packages

Ubuntu:22.04:LTS

python-django

Package

Name: python-django
Purl: pkg:deb/ubuntu/python-django?arch=source&distro=jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2:2.*

2:2.2.24-1ubuntu1

2:3.*

2:3.2.12-2

2:3.2.12-2ubuntu1

2:3.2.12-2ubuntu1.1

2:3.2.12-2ubuntu1.2

2:3.2.12-2ubuntu1.3

2:3.2.12-2ubuntu1.4

2:3.2.12-2ubuntu1.5

2:3.2.12-2ubuntu1.6

2:3.2.12-2ubuntu1.7

2:3.2.12-2ubuntu1.8

2:3.2.12-2ubuntu1.9

2:3.2.12-2ubuntu1.10

2:3.2.12-2ubuntu1.11

2:3.2.12-2ubuntu1.12

2:3.2.12-2ubuntu1.13

2:3.2.12-2ubuntu1.14

2:3.2.12-2ubuntu1.15

2:3.2.12-2ubuntu1.16

2:3.2.12-2ubuntu1.17

2:3.2.12-2ubuntu1.18

2:3.2.12-2ubuntu1.19

2:3.2.12-2ubuntu1.20

2:3.2.12-2ubuntu1.21

2:3.2.12-2ubuntu1.22

2:3.2.12-2ubuntu1.23

2:3.2.12-2ubuntu1.24

2:3.2.12-2ubuntu1.25

2:3.2.12-2ubuntu1.26

2:3.2.12-2ubuntu1.27

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "2:3.2.12-2ubuntu1.27",
            "binary_name": "python3-django"
        }
    ],
    "priority_reason": "The Django developers have rated this issue as being low severity"
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-7666.json"

Ubuntu:24.04:LTS

python-django

Package

Name: python-django
Purl: pkg:deb/ubuntu/python-django?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

3:4.*

3:4.2.4-1ubuntu2

3:4.2.8-1

3:4.2.9-1

3:4.2.11-1

3:4.2.11-1ubuntu1

3:4.2.11-1ubuntu1.1

3:4.2.11-1ubuntu1.2

3:4.2.11-1ubuntu1.3

3:4.2.11-1ubuntu1.4

3:4.2.11-1ubuntu1.5

3:4.2.11-1ubuntu1.6

3:4.2.11-1ubuntu1.7

3:4.2.11-1ubuntu1.8

3:4.2.11-1ubuntu1.9

3:4.2.11-1ubuntu1.10

3:4.2.11-1ubuntu1.11

3:4.2.11-1ubuntu1.12

3:4.2.11-1ubuntu1.13

3:4.2.11-1ubuntu1.14

3:4.2.11-1ubuntu1.15

3:4.2.11-1ubuntu1.16

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "3:4.2.11-1ubuntu1.16",
            "binary_name": "python3-django"
        }
    ],
    "priority_reason": "The Django developers have rated this issue as being low severity"
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-7666.json"

Ubuntu:25.10

python-django

Package

Name: python-django
Purl: pkg:deb/ubuntu/python-django?arch=source&distro=questing

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

3:4.*

3:4.2.18-1ubuntu1

3:4.2.18-1ubuntu1.1

3:5.*

3:5.2.4-1

3:5.2.4-1ubuntu1

3:5.2.4-1ubuntu2

3:5.2.4-1ubuntu2.1

3:5.2.4-1ubuntu2.2

3:5.2.4-1ubuntu2.3

3:5.2.4-1ubuntu2.4

3:5.2.4-1ubuntu2.5

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "3:5.2.4-1ubuntu2.5",
            "binary_name": "python3-django"
        }
    ],
    "priority_reason": "The Django developers have rated this issue as being low severity"
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-7666.json"

Ubuntu:26.04:LTS

python-django

Package

Name: python-django
Purl: pkg:deb/ubuntu/python-django?arch=source&distro=resolute

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

3:5.*

3:5.2.4-1ubuntu2

3:5.2.4-1ubuntu3

3:5.2.9-0ubuntu1

3:5.2.9-0ubuntu2

3:5.2.9-0ubuntu3

3:5.2.9-0ubuntu4

3:5.2.9-0ubuntu4.1

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "3:5.2.9-0ubuntu4.1",
            "binary_name": "python3-django"
        }
    ],
    "priority_reason": "The Django developers have rated this issue as being low severity"
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-7666.json"

Ubuntu:Pro:14.04:LTS

python-django

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.5.4-1ubuntu1

1.6-1

1.6.1-1

1.6.1-2

1.6.1-2ubuntu0.1

1.6.1-2ubuntu0.2

1.6.1-2ubuntu0.3

1.6.1-2ubuntu0.4

1.6.1-2ubuntu0.5

1.6.1-2ubuntu0.6

1.6.1-2ubuntu0.8

1.6.1-2ubuntu0.9

1.6.1-2ubuntu0.10

1.6.1-2ubuntu0.11

1.6.1-2ubuntu0.12

1.6.1-2ubuntu0.13

1.6.1-2ubuntu0.14

1.6.1-2ubuntu0.15

1.6.1-2ubuntu0.16

1.6.11-0ubuntu1

1.6.11-0ubuntu1.1

1.6.11-0ubuntu1.2

1.6.11-0ubuntu1.3

1.6.11-0ubuntu1.3+esm1

1.6.11-0ubuntu1.3+esm2

1.6.11-0ubuntu1.3+esm3

1.6.11-0ubuntu1.3+esm4

1.6.11-0ubuntu1.3+esm5

1.6.11-0ubuntu1.3+esm6

1.6.11-0ubuntu1.3+esm7

1.6.11-0ubuntu1.3+esm8

1.6.11-0ubuntu1.3+esm9

1.6.11-0ubuntu1.3+esm10

1.6.11-0ubuntu1.3+esm11

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "1.6.11-0ubuntu1.3+esm11",
            "binary_name": "python-django"
        }
    ],
    "priority_reason": "The Django developers have rated this issue as being low severity"
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-7666.json"

Ubuntu:Pro:16.04:LTS

python-django

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.7.9-1ubuntu5

1.8.5-2ubuntu1

1.8.7-1ubuntu1

1.8.7-1ubuntu2

1.8.7-1ubuntu3

1.8.7-1ubuntu4

1.8.7-1ubuntu5

1.8.7-1ubuntu5.1

1.8.7-1ubuntu5.2

1.8.7-1ubuntu5.4

1.8.7-1ubuntu5.5

1.8.7-1ubuntu5.6

1.8.7-1ubuntu5.7

1.8.7-1ubuntu5.8

1.8.7-1ubuntu5.9

1.8.7-1ubuntu5.10

1.8.7-1ubuntu5.11

1.8.7-1ubuntu5.12

1.8.7-1ubuntu5.13

1.8.7-1ubuntu5.14

1.8.7-1ubuntu5.15

1.8.7-1ubuntu5.15+esm1

1.8.7-1ubuntu5.15+esm3

1.8.7-1ubuntu5.15+esm4

1.8.7-1ubuntu5.15+esm5

1.8.7-1ubuntu5.15+esm6

1.8.7-1ubuntu5.15+esm7

1.8.7-1ubuntu5.15+esm8

1.8.7-1ubuntu5.15+esm9

1.8.7-1ubuntu5.15+esm10

1.8.7-1ubuntu5.15+esm11

1.8.7-1ubuntu5.15+esm12

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "1.8.7-1ubuntu5.15+esm12",
            "binary_name": "python-django"
        },
        {
            "binary_version": "1.8.7-1ubuntu5.15+esm12",
            "binary_name": "python-django-common"
        },
        {
            "binary_version": "1.8.7-1ubuntu5.15+esm12",
            "binary_name": "python3-django"
        }
    ],
    "priority_reason": "The Django developers have rated this issue as being low severity"
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-7666.json"

Ubuntu:Pro:18.04:LTS

python-django

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1:1.*

1:1.11.4-1ubuntu1

1:1.11.6-1ubuntu1

1:1.11.9-1ubuntu1

1:1.11.11-1ubuntu1

1:1.11.11-1ubuntu1.1

1:1.11.11-1ubuntu1.2

1:1.11.11-1ubuntu1.3

1:1.11.11-1ubuntu1.4

1:1.11.11-1ubuntu1.5

1:1.11.11-1ubuntu1.6

1:1.11.11-1ubuntu1.7

1:1.11.11-1ubuntu1.8

1:1.11.11-1ubuntu1.9

1:1.11.11-1ubuntu1.10

1:1.11.11-1ubuntu1.11

1:1.11.11-1ubuntu1.12

1:1.11.11-1ubuntu1.13

1:1.11.11-1ubuntu1.14

1:1.11.11-1ubuntu1.15

1:1.11.11-1ubuntu1.16

1:1.11.11-1ubuntu1.17

1:1.11.11-1ubuntu1.18

1:1.11.11-1ubuntu1.19

1:1.11.11-1ubuntu1.20

1:1.11.11-1ubuntu1.21

1:1.11.11-1ubuntu1.21+esm1

1:1.11.11-1ubuntu1.21+esm2

1:1.11.11-1ubuntu1.21+esm3

1:1.11.11-1ubuntu1.21+esm4

1:1.11.11-1ubuntu1.21+esm5

1:1.11.11-1ubuntu1.21+esm6

1:1.11.11-1ubuntu1.21+esm7

1:1.11.11-1ubuntu1.21+esm8

1:1.11.11-1ubuntu1.21+esm9

1:1.11.11-1ubuntu1.21+esm10

1:1.11.11-1ubuntu1.21+esm11

1:1.11.11-1ubuntu1.21+esm12

1:1.11.11-1ubuntu1.21+esm13

1:1.11.11-1ubuntu1.21+esm14

1:1.11.11-1ubuntu1.21+esm15

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "1:1.11.11-1ubuntu1.21+esm15",
            "binary_name": "python-django"
        },
        {
            "binary_version": "1:1.11.11-1ubuntu1.21+esm15",
            "binary_name": "python-django-common"
        },
        {
            "binary_version": "1:1.11.11-1ubuntu1.21+esm15",
            "binary_name": "python3-django"
        }
    ],
    "priority_reason": "The Django developers have rated this issue as being low severity"
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-7666.json"

Ubuntu:Pro:20.04:LTS

python-django

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1:1.*

1:1.11.22-1ubuntu1

2:2.*

2:2.2.6-1ubuntu1

2:2.2.9-2ubuntu1

2:2.2.10-1

2:2.2.10-1ubuntu1

2:2.2.11-1

2:2.2.12-1

2:2.2.12-1ubuntu0.1

2:2.2.12-1ubuntu0.2

2:2.2.12-1ubuntu0.3

2:2.2.12-1ubuntu0.4

2:2.2.12-1ubuntu0.5

2:2.2.12-1ubuntu0.6

2:2.2.12-1ubuntu0.7

2:2.2.12-1ubuntu0.8

2:2.2.12-1ubuntu0.9

2:2.2.12-1ubuntu0.10

2:2.2.12-1ubuntu0.11

2:2.2.12-1ubuntu0.12

2:2.2.12-1ubuntu0.13

2:2.2.12-1ubuntu0.14

2:2.2.12-1ubuntu0.15

2:2.2.12-1ubuntu0.16

2:2.2.12-1ubuntu0.17

2:2.2.12-1ubuntu0.18

2:2.2.12-1ubuntu0.19

2:2.2.12-1ubuntu0.20

2:2.2.12-1ubuntu0.21

2:2.2.12-1ubuntu0.22

2:2.2.12-1ubuntu0.23

2:2.2.12-1ubuntu0.24

2:2.2.12-1ubuntu0.25

2:2.2.12-1ubuntu0.26

2:2.2.12-1ubuntu0.27

2:2.2.12-1ubuntu0.28

2:2.2.12-1ubuntu0.29

2:2.2.12-1ubuntu0.29+esm1

2:2.2.12-1ubuntu0.29+esm2

2:2.2.12-1ubuntu0.29+esm3

2:2.2.12-1ubuntu0.29+esm4

2:2.2.12-1ubuntu0.29+esm5

2:2.2.12-1ubuntu0.29+esm6

2:2.2.12-1ubuntu0.29+esm7

2:2.2.12-1ubuntu0.29+esm8

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "2:2.2.12-1ubuntu0.29+esm8",
            "binary_name": "python3-django"
        }
    ],
    "priority_reason": "The Django developers have rated this issue as being low severity"
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-7666.json"