CVE-2026-100725 http4k before 6.48.0.0 Cookie Scoping Bypass via BasicCookieStorage

http4k Maven artifact org.http4k:http4k-core before 6.48.0.0, 5.42.0.0, and 4.51.0.0 ships a BasicCookieStorage client-side cookie store used by ClientFilters.Cookies that does not enforce RFC 6265 scoping rules for the cookie domain, path, and Secure attributes. When a single BasicCookieStorage...

CVE-2026-100725 http4k before 6.48.0.0 Cookie Scoping Bypass via BasicCookieStorage

http4k Maven artifact org.http4k:http4k-core before 6.48.0.0, 5.42.0.0, and 4.51.0.0 ships a BasicCookieStorage client-side cookie store used by ClientFilters.Cookies that does not enforce RFC 6265 scoping rules for the cookie domain, path, and Secure attributes. When a single BasicCookieStorage...

CVE-2026-100725

The http4k library (Maven artifact org.http4k:http4k-core) versions before 6.48.0.0 , 5.42.0.0 , and 4.51.0.0 contains a Cookie Scoping Bypass within the BasicCookieStorage component. The vulnerability stems from a failure to enforce RFC 6265 scoping rules for cookie domains, paths, and Secure at...

CVE-2026-100725 http4k before 6.48.0.0 Cookie Scoping Bypass via BasicCookieStorage

http4k Maven artifact org.http4k:http4k-core before 6.48.0.0, 5.42.0.0, and 4.51.0.0 ships a BasicCookieStorage client-side cookie store used by ClientFilters.Cookies that does not enforce RFC 6265 scoping rules for the cookie domain, path, and Secure attributes. When a single BasicCookieStorage...

CVE-2026-39963: Reliance on Cookies without Validation and Integrity Checking

Serendipity is a PHP-powered weblog engine. In versions 2.6-beta2 and below, the serendipitysetCookie function in include/functionsconfig.inc.php uses $SERVER'HTTPHOST' without validation as the domain parameter of setcookie. An attacker who can influence the Host header at login time, such as vi...

CVE-2026-39963

The CVE describes a vulnerability in Serendipity (PHP weblog engine) where the function serendipity_setCookie() in include/functions_config.inc.php uses $_SERVER['HTTP_HOST'] as the cookie domain without validation for versions 2.6-beta2 and earlier. An attacker who can influence the Host header ...

CVE-2026-39963 Serendipity: Host Header Injection enables authentication cookie scoping to an attacker-controlled domain

Serendipity is a PHP-powered weblog engine. In versions 2.6-beta2 and below, the serendipitysetCookie function in include/functionsconfig.inc.php uses $SERVER'HTTPHOST' without validation as the domain parameter of setcookie. An attacker who can influence the Host header at login time, such as vi...

CVE-2025-27794

Summary: CVE-2025-27794 affects Flarum versions prior to 1.8.10, where an attacker-controlled authoritative subdomain can set cookies for the parent domain, potentially enabling session hijacking on sibling subdomains. What is affected: Flarum core (pre-1.8.10) with cookies scoped to a parent dom...

CVE-2025-27794: Improper Neutralization of Special Elements in Output Used by a Downstream Component

Flarum is open-source forum software. A session hijacking vulnerability exists in versions prior to 1.8.10 when an attacker-controlled authoritative subdomain under a parent domain e.g., subdomain.host.com sets cookies scoped to the parent domain .host.com. This allows session token replacement f...