What is CVE-2026-40491?

CVE-2026-40491 is a medium-severity vulnerability in Wkentaro Gdown, classified under Path Traversal. CVSS score: 6.5/10. Published 2026-04-18.

How severe is CVE-2026-40491?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Path Traversal in Wkentaro Gdown

CVE-2026-40491

gdown is a Google Drive public file/folder downloader. Versions prior to 5.2.2 are vulnerable to a Path Traversal attack within the extractall functionality. When extracting a maliciously crafted ZIP or TAR archive, the library fails to sa…

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.001 (23.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.

Affected products

Wkentaro Gdown — versions < 5.2.2

Weakness classification (CWE)

CWE-22 — Path Traversal

References

https://github.com/wkentaro/gdown/security/advisories/GHSA-76hw-p97h-883f (x_refsource_CONFIRM, Exploit, Vendor Advisory)
https://github.com/wkentaro/gdown/commit/af569fc6ed300b7974dee66dc51e9f01b57b4dff (Patch, x_refsource_MISC)
https://github.com/wkentaro/gdown/releases/tag/v5.2.2 (x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2026-40491?: CVE-2026-40491 is a medium-severity vulnerability in Wkentaro Gdown, classified under Path Traversal. CVSS score: 6.5/10. Published 2026-04-18.
How severe is CVE-2026-40491?: Medium severity. CVSS v3 base score is 6.5 out of 10.