Django Channels 3.x before 3.0.3 allows remote attackers to obtain sensitive information…
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-200.
Summary
Django Channels 3.x before 3.0.3 allows remote attackers to obtain sensitive information from a different request scope. The legacy channels.http.AsgiHandler class, used for handling HTTP type requests in an ASGI environment prior to Django 3.0, did not correctly separate request scopes in Channels 3.0. In many cases this would result in a crash but, with correct timing, responses could be sent to the wrong client, resulting in potential leakage of session identifiers and other sensitive data. Note that this affects only the legacy Channels provided class, and not Django's similar ASGIHandler, available from Django 3.0.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | channels (PyPI) | 3.0.0 to before 3.0.3 | 3.0.3 | Patch available | GHSA-v542-8q9x-cffc |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- channels (PyPI) Vendor— Affected 3.0.0 to before 3.0.3 Fixed in 3.0.3 Patch available GHSA-v542-8q9x-cffc
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:djangoproject:channels:*:*:*:*:*:*:*:* | 3.0.0 to before 3.0.3 | Vulnerable | djangoproject |
- cpe:2.3:a:djangoproject:channels:*:*:*:*:*:*:*:* Versions 3.0.0 to before 3.0.3 Vulnerable ·djangoproject
Remediation
- Fix · GHSA-v542-8q9x-cffc channels (PyPI) Fixed in 3.0.3 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 1 product
- Red Hat Update Infrastructure 3 for Cloud Providers
Timeline
- 2026-10-02 Threatist record created from CVE-2020-35681
- 2026-10-03 Alias added: GHSA-v542-8q9x-cffc
References
Advisory 4
Sources
- CVE-2020-35681 · CVE Program
- CVE-2020-35681 · NVD
- FIRST EPSS
- GHSA-v542-8q9x-cffc · GitHub Advisory Database · CC BY 4.0
- CVE-2020-35681 · Red Hat security data · CC BY 4.0
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