CVE-2026-21762
HCL DevOps Loop is affected by missing HTTP security headers. Missing security headers may reduce browser protections against common web-bas
CVSS
3.7
Low
EPSS
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KEV
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Exploit Today
0
0-100
Published: Jul 17, 2026 · Last modified: Jul 17, 2026 · CWE-644
Not enough EPSS history yet.
HCL DevOps Loop is affected by missing HTTP security headers. Missing security headers may reduce browser protections against common web-based attacks such as clickjacking, MIME-type sniffing, and cross-site scripting.
CVECVSSEPSSKEVRExploitTitleMod.
CVE-2026-338058.6 HIG35.7%
——11@fastify/reply-from v12.6.1 and earlier and @fastify/http-proxy v11.4.3 and earlier process the client's Connection header after the proxy has added its own headers via rewriteRequestHeaders. This allows attackers to retroactively strip proxy-added headers from upstream requests by listing them in the Connection header value. Any header added by the proxy for routing, access control, or security purposes can be selectively removed by a client. @fastify/http-proxy is also affected as it delegates to @fastify/reply-from.
Upgrade to @fastify/reply-from v12.6.2 or @fastify/http-proxy v11.4.4 or later.3dCVE-2026-55791—25.2%
——8Craft CMS is a content management system (CMS). Versions 4.0.0-RC1 and above, prior to 4.18.0 and 5.0.0-RC1, and above, prior to 5.10.0, are vulnerable to Server-Side Request Forgery (SSRF) and Arbitrary JavaScript Injection through the /actions/app/resource-js endpoint. By exploiting the default permissive trustedHosts configuration, an attacker can poison the Host or X-Forwarded-Host header to manipulate the application’s $baseUrl. This bypasses the endpoint’s internal URL validation, forcing the backend Guzzle client to fetch a malicious payload from an attacker-controlled server and reflect it to the client with a Content-Type: application/javascript header. The vulnerability manifests when assetManager.cacheSourcePaths is set to false. This issue has been fixed in versions 4.18.0 and 5.10.0.16dCVE-2026-544775.4 MED14.8%
——4The admin panel lacks standard security headers, enabling clickjacking and cross-site scripting attacks.12dCVE-2026-16986.1 MED10.8%
——3A 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.9d