GHSA-mm6v-q8q9-pgcf

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

Summary

Django fails to prevent reuse of a partially-initialized connection after a failed `STARTTLS` handshake

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.

Database specific

{
    "cwe_ids":  [
        "CWE-319"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-07-13T17:26:39Z",
    "nvd_published_at":  "2026-06-03T14:16:47Z",
    "severity":  "LOW"
}

References

Affected packages

PyPI / django

Package

Name: django; View open source insights on deps.dev
Purl: pkg:pypi/django

Affected ranges

Type: ECOSYSTEM
Events: Introduced

5.2

Fixed

5.2.15

Affected versions

5.*

5.2

5.2.1

5.2.2

5.2.3

5.2.4

5.2.5

5.2.6

5.2.7

5.2.8

5.2.9

5.2.10

5.2.11

5.2.12

5.2.13

5.2.14

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-mm6v-q8q9-pgcf/GHSA-mm6v-q8q9-pgcf.json"

PyPI / django

Package

Name: django; View open source insights on deps.dev
Purl: pkg:pypi/django

Affected ranges

Type: ECOSYSTEM
Events: Introduced

6.0

Fixed

6.0.6

Affected versions

6.*

6.0

6.0.1

6.0.2

6.0.3

6.0.4

6.0.5

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-mm6v-q8q9-pgcf/GHSA-mm6v-q8q9-pgcf.json"