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CVE Vulnerability Details :
CVE-2026-42544
PUBLISHED
More InfoOfficial Page
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
View Known Exploited Vulnerability (KEV) details
Published At-12 May, 2026 | 21:46
Updated At-12 May, 2026 | 21:46
Rejected At-
▼CVE Numbering Authority (CNA)
Granian: Unauthenticated DoS via WebSocket subprotocol header panic

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.

Affected Products
Vendor
emmett-framework
Product
granian
Versions
Affected
  • >= 1.2.0, < 2.7.4
Problem Types
TypeCWE IDDescription
CWECWE-20CWE-20: Improper Input Validation
CWECWE-248CWE-248: Uncaught Exception
CWECWE-400CWE-400: Uncontrolled Resource Consumption
Type: CWE
CWE ID: CWE-20
Description: CWE-20: Improper Input Validation
Type: CWE
CWE ID: CWE-248
Description: CWE-248: Uncaught Exception
Type: CWE
CWE ID: CWE-400
Description: CWE-400: Uncontrolled Resource Consumption
Metrics
VersionBase scoreBase severityVector
3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/emmett-framework/granian/security/advisories/GHSA-vrg7-482j-p6f6
x_refsource_CONFIRM
Hyperlink: https://github.com/emmett-framework/granian/security/advisories/GHSA-vrg7-482j-p6f6
Resource:
x_refsource_CONFIRM
Details not found