PT-2026-36770

Name of the Vulnerable Software and Affected Versions phpBB versions prior to 3.3.16 Description Host Header Injection occurs when force server vars is disabled, allowing the server's hostname to be extracted from the HTTP Host header to generate password reset link URLs. An attacker capable of...

OESA-2026-2194 python-aiohttp security update

Async http client/server framework asyncio. Security Fixes: Insufficient restrictions in header/trailer handling could cause uncapped memory usage.CVE-2026-22815 An unbounded DNS cache could result in excessive memory usage possibly resulting in a DoS situation.CVE-2026-34513 An attacker who...

OESA-2026-2192 python-aiohttp security update

Async http client/server framework asyncio. Security Fixes: Insufficient restrictions in header/trailer handling could cause uncapped memory usage.CVE-2026-22815 An unbounded DNS cache could result in excessive memory usage possibly resulting in a DoS situation.CVE-2026-34513 An attacker who...

curl: libcurl: Information disclosure due to cookie leak when reusing connections with custom Host headers

A flaw was found in libcurl. This vulnerability allows for information disclosure when a custom Host: header is used in an initial HTTP request, and a subsequent request reuses the same connection without specifying a new Host: header. This can lead to libcurl incorrectly sending cookies intended...

libcurl 7.71.0 < 8.20.0 Cookie Leak via Stale Host Header

The version of libcurl installed on the remote host is 7.71.0 prior to 8.20.0. It is, therefore, affected by a cookie leak vulnerability: - When using the same connection handle for multiple HTTP requests, if a custom Host: header is removed in a subsequent request, the second request would use...

PT-2026-36293

Name of the Vulnerable Software and Affected Versions Totolink NR1800X version 9.1.0u.6279 B20210910 Description A stack-based buffer overflow exists in the lighttpd component. This issue occurs when the find host ip function improperly handles the Host argument, allowing a remote attacker to...

tomcat: Client certificate verification bypass due to virtual host mapping

A certificate validation flaw has been found in Apache Tomcat. omcat did not validate that the host name provided via the SNI extension was the same as the host name provided in the HTTP host header field. If Tomcat was configured with more than one virtual host and the TLS configuration for one ...

CVE-2026-6276

A flaw was found in libcurl. This vulnerability allows for information disclosure when a custom Host: header is used in an initial HTTP request, and a subsequent request reuses the same connection without specifying a new Host: header. This can lead to libcurl incorrectly sending cookies intended...

Improper Access Control

Caddy is vulnerable to Improper Access Control. The vulnerability is due to incorrect case-insensitive matching in the HTTP host request matcher when large host lists are configured, allowing attackers to modify the casing of the Host header and bypass host-based routing or associated access...

CVE-2026-6276

Using libcurl, when a custom Host: header is first set for an HTTP request and a second request is subsequently done using the same easy handle but without the custom Host: header set, the second request would use stale information and pass on cookies meant for the first host in the second reques...

UBUNTU-CVE-2026-6276

Using libcurl, when a custom Host: header is first set for an HTTP request and a second request is subsequently done using the same easy handle but without the custom Host: header set, the second request would use stale information and pass on cookies meant for the first host in the second reques...

RUSTSEC-2026-0189 DNS rebinding vulnerability in rmcp Streamable HTTP server transport

Prior to version 1.4.0, the rmcp crate's Streamable HTTP server transport did not validate the incoming Host header. This allowed a malicious public website, via a DNS rebinding attack, to send requests to an MCP server running on the victim's loopback or private-network interface. An attacker wh...

DNS rebinding vulnerability in rmcp Streamable HTTP server transport

Prior to version 1.4.0, the rmcp crate's Streamable HTTP server transport did not validate the incoming Host header. This allowed a malicious public website, via a DNS rebinding attack, to send requests to an MCP server running on the victim's loopback or private-network interface. An attacker wh...

CURL-CVE-2026-6276 stale custom cookie host causes cookie leak

Using libcurl, when a custom Host: header is first set for an HTTP request and a second request is subsequently done using the same easy handle but without the custom Host: header set, the second request would use stale information and pass on cookies meant for the first host in the second reques...

stale custom cookie host causes cookie leak

Using libcurl, when a custom Host: header is first set for an HTTP request and a second request is subsequently done using the same easy handle but without the custom Host: header set, the second request would use stale information and pass on cookies meant for the first host in the second reques...

PT-2026-35895

Name of the Vulnerable Software and Affected Versions curl affected versions not specified Description When using libcurl, a flaw exists where a custom Host: header set for an initial HTTP request can cause subsequent requests using the same easy handle to use stale information. If the second...

Origin Validation Error

Overview Affected versions of this package are vulnerable to Origin Validation Error via the reuse of an easy handle in HTTP requests when a custom Host: header is set for the initial request and omitted in a subsequent one. An attacker can obtain cookies intended for a different host by exploiti...

DNS Rebinding

Overview copilot-api is a Turn GitHub Copilot into OpenAI/Anthropic API compatible server. Usable with Claude Code! Affected versions of this package are vulnerable to DNS Rebinding in ericc-ch copilot-api up to 0.7.0. This impacts an unknown function of the file /token of the component Header...

Security Bulletin: Vulnerability in libsoup affects IBM Netezza Appliance

Summary The libsoup package is used by IBM Netezza Appliance . IBM Netezza Appliance has addressed the applicable CVECVE-2025-14523 Vulnerability Details CVEID:CVE-2025-14523 DESCRIPTION: A flaw in libsoup’s HTTP header handling allows multiple Host: headers in a request and returns the last...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: tomcat (UTSA-2026-014281)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-014281 advisory. Improper Input Validation vulnerability. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.14, from 10.1.0-M1 through 10.1.49, from 9.0.0-M1 through...