Critical Severity Vulnerability
This vulnerability has been rated as Critical severity. Immediate action is recommended.
CVE-2026-39847
Critical
Low
Medium
High
Critical
9.1
CVSS Score
Vulnerability Description
Emmett is a full-stack Python web framework designed with simplicity. From 2.5.0 to before 2.8.1, the RSGI static handler for Emmett's internal assets (/__emmett__ paths) is vulnerable to path traversal attacks. An attacker can use ../ sequences (eg /__emmett__/../rsgi/handlers.py) to read arbitrary files outside the assets directory. This vulnerability is fixed in 2.8.1.
CVSS Metrics
Common Vulnerability Scoring System
Vector String:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Attack Vector
N
Attack Complexity
L
Privileges Required
N
User Interaction
N
Scope
U
Confidentiality
H
Integrity
N
Availability
H
Severity Details
9.1
out of 10.0
Critical
Weakness Type (CWE)
CWE-22
Top 25 #6
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
- Description
- The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can…
- Exploit Likelihood
- High
- Typical Severity
- High
- OWASP Top 10
- A01:2021-Broken Access Control
- Abstraction Level
- Base
Key Information
- Published Date
- April 07, 2026
