Cyber Resilience

CVE-2026-42756

Critical

Published: 27 May 2026

Published
27 May 2026
Modified
27 May 2026
KEV Added
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Patch
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CVSS Score v3.1 9.9 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS Score 0.0034 25.5th percentile
Risk Priority 70 floored blend · peak EPSS

Summary

CVE-2026-42756 is a critical-severity Path Traversal (CWE-22) vulnerability. Its CVSS base score is 9.9 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 25.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

OWASP Top 10 for Web (2025)

A01:2025 Broken Access Control

EU & UK References

Vulnerability details

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Ludwig You QuickWebP – Compress / Optimize Images & Convert WebP | SEO Friendly quickwebp allows Path Traversal.This issue affects QuickWebP – Compress / Optimize Images &…

more

Convert WebP | SEO Friendly: from n/a through <= 3.2.7.

CWE(s)
CWE-22

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
Why these techniques?

Path traversal in a public-facing web plugin (WordPress) directly enables remote exploitation of the application.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2025-2505Shared CWE-22
CVE-2026-5841Shared CWE-22
CVE-2026-33242Shared CWE-22
CVE-2026-33292Shared CWE-22
CVE-2026-35605Shared CWE-22
CVE-2025-53632Shared CWE-22
CVE-2025-8110Shared CWE-22
CVE-2026-8757Shared CWE-22
CVE-2025-7712Shared CWE-22
CVE-2026-31817Shared CWE-22

Affected Assets

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-10 Information Input Validation
addresses: CWE-22

Validates pathnames and filenames to prevent traversal outside intended directories.

References