Vulnerability · Published Feb 26, 2026 · Assigned by arcinfo

CVE-2026-1698HTTP Host header vulnerability in WebClient and WebScheduler web apps

Medium 5.3

In plain English

A medium-severity security flaw in PcVue from arcinfo. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities).

Severity (CVSS 4.0)5.3Medium

Exploit odds (30 days)0.2%top 84.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
arcinfo	PcVue	16.0.0 – through 16.3.315.0.0 – through 15.2.13

Weakness: CWE-644 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:L/SI:L/SA:N/AU:Y/R:U/RE:M/U:Clear

References

https://www.pcvue.com/security/#SB2026-2 vendor-advisory