Header injection via WebSocket upgrade parser differential allows ASGI scope header spoofing
Published Jun 3, 2026
5.3
MEDIUMCVSS 3.1
EPSS 0.29%
Description
daphne before 4.2.2 reconstructs a raw HTTP request from Twisted's parsed headers and feeds it to autobahn for WebSocket handshake processing. Twisted does not treat \x0b, \x0c, \x1c, \x1d, \x1e, or \x85 as header line separators, but autobahn decodes header values to str and calls splitlines(). An attacker can exploit this parser differential to inject additional headers into the ASGI scope passed to the application. daphne now rejects requests with these bytes in any header value with a 400 response.
Affected products
-
- Version 4.2.0StatusaffectedConstraints<=4.2.1
- Version 4.2.2StatusunaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Djangoproject | Daphne | unaffected |
|
- < 4.2.2
No data.
Red Hat Ansible Automation Platform 2
ansible-automation-platform-25/lightspeed-rhel8
Fix deferred
Red Hat Ansible Automation Platform 2
ansible-automation-platform-26/controller-rhel9
Fix deferred
Red Hat Ansible Automation Platform 2
ansible-automation-platform-26/eda-controller-rhel9
Fix deferred
Red Hat Ansible Automation Platform 2
ansible-automation-platform-26/lightspeed-rhel9
Fix deferred
Red Hat Ansible Automation Platform 2
ansible-automation-platform-27/controller-rhel9
Fix deferred
Red Hat Ansible Automation Platform 2
ansible-automation-platform-27/eda-controller-rhel9
Fix deferred
Red Hat Ansible Automation Platform 2
ansible-automation-platform-27/lightspeed-rhel9
Fix deferred
Red Hat Ansible Automation Platform 2
automation-controller
Fix deferred
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Ansible Automation Platform 2 | ansible-automation-platform-25/lightspeed-rhel8 | Fix deferred | n/a |
| Red Hat Ansible Automation Platform 2 | ansible-automation-platform-26/controller-rhel9 | Fix deferred | n/a |
| Red Hat Ansible Automation Platform 2 | ansible-automation-platform-26/eda-controller-rhel9 | Fix deferred | n/a |
| Red Hat Ansible Automation Platform 2 | ansible-automation-platform-26/lightspeed-rhel9 | Fix deferred | n/a |
| Red Hat Ansible Automation Platform 2 | ansible-automation-platform-27/controller-rhel9 | Fix deferred | n/a |
| Red Hat Ansible Automation Platform 2 | ansible-automation-platform-27/eda-controller-rhel9 | Fix deferred | n/a |
| Red Hat Ansible Automation Platform 2 | ansible-automation-platform-27/lightspeed-rhel9 | Fix deferred | n/a |
| Red Hat Ansible Automation Platform 2 | automation-controller | Fix deferred | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
References (7)
- https://access.redhat.com/security/cve/CVE-2026-44546 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2484368 Issue Tracking
- https://github.com/advisories/GHSA-xh68-hfp5-5x5m Advisory
- https://github.com/django/daphne/blob/main/CHANGELOG.txt release-notesRelease Notes
- https://github.com/pypa/advisory-database/tree/main/vulns/daphne/PYSEC-2026-214.yaml
- https://nvd.nist.gov/vuln/detail/CVE-2026-44546
- https://www.cve.org/CVERecord?id=CVE-2026-44546
Change history (0)
No recorded changes yet.