Is CVE-2026-39847 actively exploited?

No active exploitation of CVE-2026-39847 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-39847 be exploited remotely?

Yes. CVE-2026-39847 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-39847?

CVE-2026-39847 has a CVSS score of 9.1 (CRITICAL).

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CRITICAL

CVE-2026-39847

CWE-22Published: April 7, 2026· Updated: Apr 8, 2026

9.1

CVSS v3.1

EPSS:0.05%probability of exploitation in 30 daysPercentile:16.0th

Official 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.

NVD Source

Technical Analysis

CVE-2026-39847 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), availability disruption (denial of service), with a CVSS base score of 9.1.