CVE-2026-39847
Critical
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.
SeverityCritical
CVSS9.1
Exploit probability—
ProductEmmett
PublishedApr 7, 2026
First seenApr 7, 2026
Weakness typeCWE-22Path traversal
How to fix
Update
- emmett emmett2.8.1 or later
- emmett2.8.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| emmett emmett | 2.5.0 ≤ v < 2.8.1 | 2.8.1 |
| emmettPyPI | 2.5.0 ≤ v < 2.8.1 | 2.8.1 |
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