CVE-2026-7666Disclosure(djangoproject / django)

LOWCVSS 2.3 · LOW

Signal is active with 1 mentions in latest observed window

Immediate actions

Patch djangoproject django systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD 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.

djangoproject CVEs Back to dashboard

0.5/ 10 priority

Sources & remediation

Patch / fix

Other references

https://groups.google.com/g/django-announce

Weakness type (CWE)

CWE-319

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

django

Threat summary

Patch or workaround signal is available
3 mentions across 3 observed days
Momentum state: stable

What's happening

Patch or workaround mentioned in 1 signal
Technical details provided in 3 signals
Disclosure: 2 classified signals
Peaked 2d ago at 1 mentions (2026-06-03); latest day: 1
3 total mentions across 3 days

Affected systems

Vendors

djangoproject

Products

django

Deep dive

Activity timeline3 mentions / 3d

Signal classification2 categories

Disclosure

266.7%

Patch

133.3%

Referenced assets3 URLs

By indicator

Classification over time

Date	Total	Labels

2026-06-03	1	Disclosure1
2026-06-05	1	Patch1
2026-06-06	1	Disclosure1

Full discourse3 posts

Open Source Security mailing list@oss_security134d
Disclosure
5 CVEs in Django https://www.openwall.com/lists/oss-security/2026/06/03/10 CVE-2026-6873: Signed cookie salt namespace collision in django.http.HttpRequest.get_signed_cookie CVE-2026-7666: Potential unencrypted email transmission via STARTTLS in the SMTP backend + next tweet
Post summary
The tweet announces five Django CVEs with concise technical details, but offers no evidence of PoC, exploitation, or remediation.
120611.4K
4.7K followersView on X
BnSnK@BunSnack135d
Patch
June Django security release: 4 CVEs spanning cache middleware (CVE-2026-8404, CVE-2026-48587), STARTTLS downgrade in EmailBackend (CVE-2026-7666), signed cookie salt collision (CVE-2026-6873). Fix the STARTTLS one first. https://www.djangoproject.com/weblog/2026/jun/03/security-releases/
Post summary
The post announces Django’s June security release, lists four CVEs—including a STARTTLS downgrade in EmailBackend—and advises to address the STARTTLS issue first, providing a link to the vendor’s patch advisory.
000209
6 followersView on X
Vulmon Vulnerability Feed@VulmonFeeds137d
Disclosure
CVE-2026-7666 Cleartext Email Interception in Django SMTP Backend After Failed STARTTLS https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-7666
Post summary
The text announces CVE-2026-7666, specifying a Django SMTP backend flaw that allows cleartext interception when STARTTLS fails, providing technical details but no PoC, exploit, patch, or active exploitation evidence.
0000048
4.0K followersView on X

CPE platform detail1 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

1 of 1 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	djangoproject	django	-	-	-

Explore more

Back to dashboard djangoproject CVEs django vulnerabilities