What is CVE-2026-39847?

CVE-2026-39847 is a critical-severity vulnerability in Emmett-framework Emmett, classified under Path Traversal. CVSS score: 9.1/10. Published 2026-04-07.

How severe is CVE-2026-39847?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Path Traversal in Emmett-framework Emmett

CVE-2026-39847

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 ../ seq…

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.000 (5.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

Affected products

Emmett-framework Emmett — versions >= 2.5.0, < 2.8.1

Weakness classification (CWE)

CWE-22 — Path Traversal

References

https://github.com/emmett-framework/emmett/security/advisories/GHSA-pr46-2v3c-5356 (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-39847?: CVE-2026-39847 is a critical-severity vulnerability in Emmett-framework Emmett, classified under Path Traversal. CVSS score: 9.1/10. Published 2026-04-07.
How severe is CVE-2026-39847?: Critical severity. CVSS v3 base score is 9.1 out of 10.