CVE catalog
CVE-2026-44545
daphne before 4.2.2 did not pass maxFramePayloadSize or maxMessagePayloadSize to Autobahn's WebSocketServerFactory. Because Autobahn defaults both values to 0 (unlimited), an unauthenticated remote at
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.33% · Oct 27, 2026
daphne before 4.2.2 did not pass maxFramePayloadSize or maxMessagePayloadSize to Autobahn's WebSocketServerFactory. Because Autobahn defaults both values to 0 (unlimited), an unauthenticated remote attacker could send arbitrarily large WebSocket messages or frames, causing excessive memory consumption and a denial of service.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | python-daphne | sid | 4.2.3-1 | fixed |
| Debian | python-daphne | forky | 4.2.3-1 | fixed |
| Debian | python-daphne | trixie | 4.1.2-2+deb13u1 | fixed |
| Debian | python-daphne | bookworm | 4.0.0-1 | vulnerable |
| Cpe | python-daphne | Not reported | Not reported | vulnerable |
| Cpe | daphne | Not reported | 4.2.2 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | python-daphne | source | sid | 4.2.2-0.1 | not yet assigned | Not reported | [1138864] |
| Debian | python-daphne | source | forky | 4.2.2-0.1 | not yet assigned | Not reported | [1138864] |
| Debian | python-daphne | source | trixie | 4.1.2-2+deb13u1 | not yet assigned | Not reported | [1138864] |
| Debian | python-daphne | source | bookworm | (unfixed) | not yet assigned | Not reported | [1138864] |
| Cpe | daphne | cpe | Not reported | 4.2.2 | Not reported | Not reported | Not reported |
Notes
[bookworm] python-daphne: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [daphne]Affected
Source package: [python-daphne]
Details (2)
4.0.0-1· all · bookwormAffected
nvd · python-daphne · debian · bookworm; nvd · python-daphne · debian · 12
4.0.0-1· all · bookwormAffected
nvd · python-daphne · debian · bookworm; nvd · python-daphne · debian · 12
- [python3-daphne]Affected
Source package: [python-daphne]
Details (2)
4.0.0-1· all · bookwormAffected
nvd · python-daphne · debian · bookworm; nvd · python-daphne · debian · 12
4.0.0-1· all · bookwormAffected
nvd · python-daphne · debian · bookworm; nvd · python-daphne · debian · 12
[Debian 13 (Trixie)]
- [daphne]Fixed
Source package: [python-daphne]
Details (2)
4.1.2-2+deb13u1· all · trixieFixed · Fixed:
4.1.2-2+deb13u1nvd · python-daphne · debian · 13
4.1.2-2+deb13u1· all · trixieFixed · Fixed:
4.1.2-2+deb13u1nvd · python-daphne · debian · 13
- [python3-daphne]Fixed
Source package: [python-daphne]
Details (2)
4.1.2-2+deb13u1· all · trixieFixed · Fixed:
4.1.2-2+deb13u1nvd · python-daphne · debian · 13
4.1.2-2+deb13u1· all · trixieFixed · Fixed:
4.1.2-2+deb13u1nvd · python-daphne · debian · 13
Observed:
References
- [https://access.redhat.com/errata/RHSA-2026:50357]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-44545]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-44545]
- [https://security-tracker.debian.org/tracker/CVE-2026-44545]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]