GHSA-458G-Q4FH-MJ6R Serendipity has a Host Header Injection allows SMTP header injection via unvalidated HTTP_HOST in Message-ID email header

Summary Serendipity inserts $SERVER'HTTPHOST' directly into the Message-ID SMTP header without any validation beyond CRLF stripping. An attacker who can control the Host header during an email-triggering action can inject arbitrary SMTP headers into outgoing emails, enabling spam relay, BCC...

Reliance on Cookies without Validation and Integrity Checking

Overview Affected versions of this package are vulnerable to Reliance on Cookies without Validation and Integrity Checking via the serendipitysetCookie function. An attacker can cause authentication cookies, including session and auto-login tokens, to be scoped to an attacker-controlled domain by...

GHSA-4M6C-649P-F6GF Serendipity has a Host Header Injection allows authentication cookie scoping to attacker-controlled domain in functions_config.inc.php

Summary The serendipitysetCookie function uses $SERVER'HTTPHOST' without validation as the domain parameter of setcookie. An attacker can force authentication cookies — including session tokens and auto-login tokens — to be scoped to an attacker-controlled domain, facilitating session hijacking...

EUVD-2026-22809

Serendipity has a Host Header Injection allows authentication cookie scoping to attacker-controlled domain in functionsconfig.inc.php...

Serendipity has a Host Header Injection allows authentication cookie scoping to attacker-controlled domain in functions_config.inc.php

Summary The serendipitysetCookie function uses $SERVER'HTTPHOST' without validation as the domain parameter of setcookie. An attacker can force authentication cookies — including session tokens and auto-login tokens — to be scoped to an attacker-controlled domain, facilitating session hijacking...

SUSE CVE-2026-1502

CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host...

curl: CVE-2026-6276: stale custom cookie host causes cookie leak

Summary: libcurl keeps a stale data-state.aptr.cookiehost after a request that uses a custom Host: header. On later requests on the same easy handle, when no custom Host: is used, libcurl still reuses that stale value for outgoing cookie selection lib/http.c:2560-2563 and incoming Set-Cookie...

PT-2026-32967

Summary Serendipity inserts $ SERVER'HTTP HOST' directly into the Message-ID SMTP header without any validation beyond CRLF stripping. An attacker who can control the Host header during an email-triggering action can inject arbitrary SMTP headers into outgoing emails, enabling spam relay, BCC...

PT-2026-32966

Summary The serendipity setCookie function uses $ SERVER'HTTP HOST' without validation as the domain parameter of setcookie. An attacker can force authentication cookies — including session tokens and auto-login tokens — to be scoped to an attacker-controlled domain, facilitating session hijackin...

CVE-2026-35577

Apollo MCP Server is a Model Context Protocol server that exposes GraphQL operations as MCP tools. Prior to version 1.7.0, the Apollo MCP Server did not validate the Host header on incoming HTTP requests when using StreamableHTTP transport. In configurations where an HTTP-based MCP server is run ...

Exploit for Server-Side Request Forgery in Vercel Next.Js

CVE-2024-34351 Demo Minimal Next.js 14.0.0 application for de...

EUVD-2026-21519

CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host...

ALPINE-CVE-2026-1502

CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host...

CVE-2026-1502

CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host...

UBUNTU-CVE-2026-1502

CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host...

CVE-2026-1502

CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host...

CVE-2026-1502

CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host...

CVE-2026-1502

The CVE-2026-1502 entry concerns CR/LF bytes not being rejected by HTTP client proxy tunnel headers or host, as described in both the CVE record and the CVE-List entry. The connected documents indicate this is related to HTTP client proxy tunnel header validation, without providing specific affec...

PSF-2026-15

CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host...

CRLF Injection

Overview Affected versions of this package are vulnerable to CRLF Injection via improper validation of HTTP client proxy tunnel headers or host fields. An attacker can inject arbitrary HTTP headers. Remediation A fix was pushed into the master branch but not yet published. References - GitHub...