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CVE-2026-44962 is a critical XPath injection vulnerability in Plesk for Linux affecting the APS Application Catalog search functionality. The flaw is caused by user-supplied search input being interpolated into XPath queries against XML-backed APS Catalog data without proper sanitization. An authenticated low-privileged user can abuse the vulnerable search feature to inject crafted XPath expressions that reach backend processing paths and ultimately trigger arbitrary operating system command execution on the underlying server. Because the affected backend operations execute with higher privileges than the initiating user, successful exploitation results in local privilege escalation, up to root-level command execution. Affected versions include Plesk Obsidian 18.0.75 before 18.0.75.1 and 18.0.76 before 18.0.76.2; more broadly, installations prior to 18.0.77 are exposed when APS Catalog remains enabled.
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A vulnerability in Plesk's APS Catalog affecting Plesk for Linux versions prior to 18.0.75.1 and 18.0.76.2.
A critical authenticated command execution vulnerability in Plesk's APS Application Catalog component caused by an XPath injection flaw in the APS Catalog search functionality, allowing low-privileged users to escalate privileges and execute arbitrary OS commands.
A critical Plesk vulnerability affecting Linux installations in which an XPath injection in the APS Application Catalog search functionality allows an authenticated low-privileged user to execute arbitrary operating system commands and escalate privileges to administrative access.
An XPath injection vulnerability in Plesk APS Application Catalog search functionality that can allow an authenticated low-privileged user to execute arbitrary OS commands on the server and achieve local privilege escalation.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.