CVE-2026-24530 in WebP Conversion Plugin
Summary
by MITRE • 01/23/2026
Missing Authorization vulnerability in sheepfish WebP Conversion webp-conversion allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects WebP Conversion: from n/a through <= 2.1.
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Analysis
by VulDB Data Team • 01/23/2026
The CVE-2026-24530 vulnerability represents a critical missing authorization flaw within the sheepfish WebP Conversion webp-conversion component that directly impacts access control security configurations. This vulnerability stems from incorrectly configured security levels that fail to properly validate user permissions before granting access to sensitive conversion functionalities. The affected version range indicates that all installations from the initial release through version 2.1 contain this security weakness, suggesting a long-standing issue that has not been adequately addressed in the software lifecycle.
The technical implementation of this vulnerability manifests through improper access control validation mechanisms that should enforce authorization checks before allowing users to perform webp conversion operations. Attackers can exploit this weakness by bypassing the intended security boundaries that would normally restrict access to conversion features based on user roles or permissions. This misconfiguration creates a scenario where unauthorized users can potentially access conversion functionalities that should be restricted to authenticated administrators or authorized personnel, effectively undermining the principle of least privilege and proper access control enforcement.
The operational impact of this vulnerability extends beyond simple unauthorized access to encompass potential data integrity and confidentiality risks. When attackers can bypass access controls, they may gain the ability to process, convert, or manipulate webp images without proper authorization, potentially leading to unauthorized content modification, data exfiltration, or system compromise through the exploitation of additional vulnerabilities that may exist within the conversion process. The vulnerability particularly affects webp-conversion functionality where the security controls are not properly enforced during the conversion workflow, creating potential attack vectors for malicious actors seeking to abuse the system.
From a cybersecurity perspective, this vulnerability aligns with CWE-285, which specifically addresses improper authorization issues in software systems, and represents a clear violation of the access control principles outlined in the NIST Cybersecurity Framework. The ATT&CK framework would categorize this vulnerability under privilege escalation and unauthorized access techniques, where adversaries can leverage misconfigured access controls to gain elevated privileges or access to restricted resources. Organizations should implement immediate mitigations including thorough access control reviews, proper role-based access control implementations, and comprehensive security testing to identify and remediate similar configuration issues across their software environments.
The remediation approach should focus on implementing proper authorization checks at multiple points within the webp-conversion process, ensuring that all access attempts are validated against appropriate user permissions and roles. Security configurations must be audited to verify that access control mechanisms are properly enforced, and that the software correctly implements authentication and authorization protocols. Regular security assessments and penetration testing should be conducted to identify potential access control misconfigurations, while proper logging and monitoring should be implemented to detect unauthorized access attempts and conversion activities that may indicate exploitation of this vulnerability.