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Low

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

  • Disclosed: 03.06.2026
  • Updated: 11.10.2026 15:17

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.

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
Python (PyPI) django >= 5.2, < 5.2.15, >= 6.0, < 6.0.6 5.2.15, 6.0.6

References

CVSS score 3.1/10
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
Weakness (CWE)
CWE-319
Platform
Python (PyPI)
Package
django
Disclosed
03.06.2026
Updated
11.10.2026 15:17

Sources and licenses

OSV / GitHub Advisory Database - PYSEC-2026-200 - PyPA Advisory Database; CC BY 4.0

OSV / GitHub Advisory Database - GHSA-mm6v-q8q9-pgcf - CC BY 4.0

Vulnerability history: django

All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (162) in the archive
Total entries
162
First → latest
10.2007 08.2026
Without a fix
1
Exploited in attacks
0

Severity breakdown

  • Critical 16
  • High 65
  • Medium 63
  • Low 18

Disclosures per year

earlier: 56

Severity:
  1. Django GeoDjango spatial lookups allow file writes and outbound requests through GDAL raster parsing
    High · 8.8 CVE-2026-15307 < 5.2.17, >= 6.0a1, < 6.0.8 5.2.17, 6.0.8
  2. Django fails to prevent reuse of a partially-initialized connection after a failed `STARTTLS` handshake this entry
    Low · 3.1 CVE-2026-7666 >= 5.2, < 5.2.15, >= 6.0, < 6.0.6 5.2.15, 6.0.6
  3. Django vulnerable to ASGI header spoofing via underscore/hyphen conflation
    High · 7.5 CVE-2026-3902 >= 6.0, < 6.0.4, >= 5.2, < 5.2.13, >= 4.2, < 4.2.30 6.0.4, 5.2.13, 4.2.30
  4. Django: SGI requests with a missing or understated `Content-Length` header could bypass the `DATA_UPLOAD_MAX_MEMORY_SIZE` limit
    High · 7.5 CVE-2026-33034 >= 6.0, < 6.0.4, >= 5.2, < 5.2.13, >= 4.2, < 4.2.30 6.0.4, 5.2.13, 4.2.30
  5. Django vulnerable to Uncontrolled Resource Consumption
    High · 7.5 CVE-2026-25673 >= 6.0, < 6.0.3, >= 5.2, < 5.2.12, >= 4.2, < 4.2.29 6.0.3, 5.2.12, 4.2.29
  6. Django has an SQL Injection issue
    High CVE-2026-1287 >= 6.0a1, < 6.0.2, >= 5.2a1, < 5.2.11, >= 4.2a1, < 4.2.28 6.0.2, 5.2.11, 4.2.28
  7. Django has an SQL Injection issue
    High CVE-2026-1207 >= 6.0a1, < 6.0.2, >= 5.2a1, < 5.2.11, >= 4.2a1, < 4.2.28 6.0.2, 5.2.11, 4.2.28
  8. An issue was discovered in 5.1 before 5.1.14, 4.2 before 4.2.26, and 5.2 before 5.2.8.
    Critical · 9.1 CVE-2025-64459 >= 4.2, < 4.2.26, >= 5.1, < 5.1.14, >= 5.2, < 5.2.8 4.2.26, 5.1.14, 5.2.8
  9. Django has a denial-of-service vulnerability in HttpResponseRedirect and HttpResponsePermanentRedirect on Windows
    High · 7.5 CVE-2025-64458 >= 5.2a1, < 5.2.8, >= 5.0a1, < 5.1.14, < 4.2.26 5.2.8, 5.1.14, 4.2.26
  10. Django vulnerable to SQL injection in column aliases
    High · 7.1 CVE-2025-59681 >= 4.2, < 4.2.25, >= 5.1, < 5.1.13, >= 5.2, < 5.2.7 4.2.25, 5.1.13, 5.2.7
  11. Django is subject to SQL injection through its column aliases
    High · 7.1 CVE-2025-57833 < 4.2.24, >= 5.0a1, < 5.1.12, >= 5.2a1, < 5.2.6 4.2.24, 5.1.12, 5.2.6
  12. Django SQL injection in HasKey(lhs, rhs) on Oracle
    High · 9.8 CVE-2024-53908 >= 5.0.0, < 5.0.10, >= 5.1.0, < 5.1.4, >= 4.2.0, < 4.2.17, >= 5.1, < 5.1.4, >= 5.0, < 5.0.10, >= 4.2, < 4.2.17 5.0.10, 5.1.4, 4.2.17
  13. An issue was discovered in Django 5.0 before 5.0.8 and 4.2 before 4.2.15. QuerySet.values() and values_list() methods on models with a JSONField are subject to SQL injection in column aliases via a cr
    Critical · 9.1 CVE-2024-42005 >= 5.0, < 5.0.8, >= 4.2, < 4.2.15 5.0.8, 4.2.15
  14. Django vulnerable to Denial of Service
    High · 7.5 CVE-2024-39614 >= 5.0, < 5.0.7, >= 4.2, < 4.2.14 5.0.7, 4.2.14
  15. Django Path Traversal vulnerability
    High · 7.5 CVE-2024-39330 >= 5.0, < 5.0.7, >= 4.2, < 4.2.14 5.0.7, 4.2.14
  16. Django vulnerable to Denial of Service
    High · 7.5 CVE-2024-38875 >= 4.2, < 4.2.14, >= 5.0, < 5.0.7 4.2.14, 5.0.7
  17. Django denial-of-service attack in the intcomma template filter
    High · 5.9 CVE-2024-24680 >= 3.2, < 3.2.24, >= 4.2, < 4.2.10, >= 5.0, < 5.0.2 3.2.24, 4.2.10, 5.0.2
  18. In Django 3.2 before 3.2.22, 4.1 before 4.1.12, and 4.2 before 4.2.6, the django.utils.text.Truncator chars() and words() methods (when used with html=True) are subject to a potential DoS (denial of s
    High · 5.9 CVE-2023-43665 >= 3.2, < 3.2.22, >= 4.1, < 4.1.12, >= 4.2, < 4.2.6 3.2.22, 4.1.12, 4.2.6
  19. An issue was discovered in Django 3.2 before 3.2.23, 4.1 before 4.1.13, and 4.2 before 4.2.7. The NFKC normalization is slow on Windows. As a consequence, django.contrib.auth.forms.UsernameField is su
    High · 7.5 CVE-2023-46695 >= 3.2, < 3.2.23, >= 4.1, < 4.1.13, >= 4.2, < 4.2.7 3.2.23, 4.1.13, 4.2.7
  20. In Django 3.2 before 3.2.20, 4 before 4.1.10, and 4.2 before 4.2.3, EmailValidator and URLValidator are subject to a potential ReDoS (regular expression denial of service) attack via a very large numb
    High · 7.5 CVE-2023-36053 >= 4.2, < 4.2.3, >= 4.0, < 4.1.10, >= 3.2, < 3.2.20 4.2.3, 4.1.10, 3.2.20
Show more (20) Showing 20 of 82

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