CVE-2026-44545

FAUCET Score

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.

First published: Jun 3, 2026Last modified: Jun 3, 2026

Impacted Technologies

Vendor	Product	Version(s)	CPE
		>= 4.2.0, <= 4.2.1CPE match	cpe:2.3:a:djangoproject:daphne::::::::
		< 4.2.2CPE matchmatch criteria	cpe:2.3:a:djangoproject:daphne::::::::

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

LOW

Exploitability Score

3.9

Impact Score

1.4

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.33%

Probability of exploitation in next 30 days

EPSS Percentile

25.2%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.0033 is in the 7th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

pippatch availablevia ghsa

Product: daphneFixed in: 4.2.2

Vendor Advisories (1)

pipGHSA-rrc9-mx66-ffcmmedium

daphne: Unauthenticated attackers can cause excessive memory consumption by sending arbitrarily large WebSocket messages/frames

Jun 3, 2026

References

github.com / django/daphne/blob/main/CHANGELOG.txt

Release Notes