CVE-2026-1698
MediumCVSS 6.1Exploitation Probability (EPSS)
Low risk11th percentile - higher than 11% of all known CVEs
Summary
An HTTP Host header attack vulnerability in PcVue WebClient and WebScheduler web apps (versions 15.0.0 through 16.3.3) allows a remote attacker to inject harmful payloads that manipulate server-side behavior. The issue affects specific endpoints: /Authentication/ExternalLogin, /Authentication/AuthorizationCodeCallback, and /Authentication/Logout.
Risk Assessment
An attacker can exploit this vulnerability to hijack authentication sessions, potentially leading to unauthorized access to the system and sensitive organizational data.
Recommendation
Immediately update PcVue to a version later than 16.3.3 that includes the fix. Until then, restrict access to the affected endpoints and implement server-side Host header validation.
Original NVD description (English source)
A HTTP Host header attack vulnerability affects WebClient and the WebScheduler web apps of PcVue in version 15.0.0 through 16.3.3 included, allowing a remote attacker to inject harmful payloads that manipulate server-side behavior. This vulnerability only affects the endpoints /Authentication/ExternalLogin, /Authentication/AuthorizationCodeCallback and /Authentication/Logout of the WebClient and WebScheduler web apps.