{"cve":"CVE-2026-7666","nvd":{"published":"2026-06-03T14:16:47.087","modified":"2026-07-21T19:10:00.107","status":"Analyzed","description":"An issue was discovered in Django 6.0 before 6.0.6 and 5.2 before 5.2.15.\n`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.\nEarlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected.\nDjango would like to thank Kasper Dupont for reporting this issue.","cvss_v4":{"vector":"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","score":2.3},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N","score":3.1},"cwes":["CWE-319"],"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/"],"products":["djangoproject:django"],"source":"nvd","synced_at":"2026-10-19T22:37:48.043517290+00:00"},"epss":{"cve":"CVE-2026-7666","score":0.0015,"percentile":0.04174,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-mm6v-q8q9-pgcf","url":"https://osv.dev/vulnerability/GHSA-mm6v-q8q9-pgcf","summary":"Django fails to prevent reuse of a partially-initialized connection after a failed `STARTTLS` handshake","modified":"2026-09-10T03:51:08.992400956Z","packages":[{"ecosystem":"PyPI","name":"django","purl":"pkg:pypi/django","ranges":[">=5.2 <5.2.15"],"fixed":["5.2.15"]},{"ecosystem":"PyPI","name":"django","purl":"pkg:pypi/django","ranges":[">=6.0 <6.0.6"],"fixed":["6.0.6"]}]},{"id":"PYSEC-2026-200","url":"https://osv.dev/vulnerability/PYSEC-2026-200","summary":"","modified":"2026-07-23T15:00:11.066347895Z","packages":[{"ecosystem":"PyPI","name":"django","purl":"pkg:pypi/django","ranges":[">=5.2 <5.2.15",">=6.0 <6.0.6"],"fixed":["5.2.15","6.0.6"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}