QwikSec

Security Database

CVE

CWE

Training

CVE Database
/

CVE-2026-42544

Back to search

CVE-2026-42544

Published: May 12, 2026

Modified: May 18, 2026

PUBLISHED

CVSS v3.1

7.5

HIGH

Description

Granian is a Rust HTTP server for Python applications. From 1.2.0 to 2.7.4, Granian aborts a worker process when an unauthenticated client sends a WebSocket upgrade request whose Sec-WebSocket-Protocol header contains non-ASCII bytes. The crash happens in Granian's WebSocket scope construction path, before the ASGI application is invoked. This vulnerability is fixed in 2.7.4.

VendorProductVersions

emmett-framework

granian

affected
>= 1.2.0, < 2.7.4

Weaknesses (CWE)

CWE-20
CWE-248
CWE-400

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

References

Security Training

Train your team to recognize and prevent security threats with our comprehensive security awareness program.

Start Training

Vulnerability Scanning

Discover vulnerabilities in your applications and infrastructure before attackers do.

Scan Now