CVE-2026-7666

June 4, 2026, 3:21 p.m.

2.3
Low

Description

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.

Product(s) Impacted

Vendor Product Versions
Djangoproject
  • Django
  • 6.0, 5.2, <5.2.15, <6.0.6, 5.0, 4.1, 3.2

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-319
Cleartext Transmission of Sensitive Information
The product transmits sensitive or security-critical data in cleartext in a communication channel that can be sniffed by unauthorized actors.

*CPE(s)

Affected systems and software identified for this CVE.

Type Vendor Product Version Update Edition Language Software Edition Target Software Target Hardware Other Information
a djangoproject django 6.0 / / / / / / /
a djangoproject django 5.2 / / / / / / /
a djangoproject django <5.2.15 / / / / / / /
a djangoproject django <6.0.6 / / / / / / /
a djangoproject django 5.0 / / / / / / /
a djangoproject django 4.1 / / / / / / /
a djangoproject django 3.2 / / / / / / /

References

https://docs.djangoproject.com/en/dev/releases/security/
https://groups.google.com/g/django-announce
https://www.djangoproject.com/weblog/2026/jun/03/security-releases/

Tags

CWE-319
6a34fbeb-21d4-45e7-8e0a-62b95bc12c92
2026-06-03
CVE-2026-7666

CVSS Score

2.3 / 10

CVSS Data - 4.0

  • Attack Vector: NETWORK
  • Attack Complexity: HIGH
  • Attack Requirements: PRESENT
  • Privileges Required: NONE
  • User Interaction: PASSIVE
  • Scope:
  • Confidentiality Impact: LOW
  • Integrity Impact: NONE
  • Availability Impact: NONE
  • Exploit Maturity: NOT_DEFINED

    • 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

    View Vector String

Timeline

Published: June 3, 2026, 2:16 p.m.
Last Modified: June 4, 2026, 3:21 p.m.

Status : Undergoing Analysis

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

6a34fbeb-21d4-45e7-8e0a-62b95bc12c92

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.