Path Traversal in Ludwig You Quickwebp – Compress / Optimize Images &Amp; Convert Webp | Seo Friendly

CVE-2026-42756

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Ludwig You QuickWebP &#8211; Compress / Optimize Images &amp; Convert WebP | SEO Friendly quickwebp allows Path Traversal.This issue affects QuickWebP &#8211; Compress / Optimize Images &amp; Convert WebP | SEO Friendly: from n/a through <= 3.2.7.

Vulnerability class: Path Traversal (Directory Traversal)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (43.9th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 43.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-42756: held from 0.003 to 0.005.

EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-42756?
CVE-2026-42756 is a critical-severity vulnerability in Ludwig You Quickwebp &#8211; Compress / Optimize Images &Amp; Convert Webp | Seo Friendly, classified under Path Traversal. CVSS score: 9.9/10. Published 2026-05-27.
How severe is CVE-2026-42756?
Critical severity. CVSS v3 base score is 9.9 out of 10.