CVE-2026-91966

AVideo through 29.0 contains an unauthenticated server-side request forgery vulnerability in the checksiteavailability function that accepts attacker-controlled HTTP Host headers. Attackers can send requests to submitIndex.php or ajax.php with arbitrary Host headers to probe internal network host...

CVE-2026-91966: Server-Side Request Forgery (SSRF)

AVideo through 29.0 contains an unauthenticated server-side request forgery vulnerability in the checksiteavailability function that accepts attacker-controlled HTTP Host headers. Attackers can send requests to submitIndex.php or ajax.php with arbitrary Host headers to probe internal network host...

Security update for python-h2

This update for python-h2 fixes the following issue: CVE-2026-71554: duplicate Host headers are accepted and forwarded to consuming applications, which can lead to request smuggling bsc1274386. Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST...

SUSE-SU-2026:3970-1 Security update for python-h2

This update for python-h2 fixes the following issue: - CVE-2026-71554: duplicate Host headers are accepted and forwarded to consuming applications, which can lead to request smuggling bsc1274386...

SUSE-SU-2026:23563-1 Security update for python-h2

This update for python-h2 fixes the following issue: - CVE-2026-71554: duplicate Host headers are accepted and forwarded to consuming applications, which can lead to request smuggling bsc1274386...

OPENSUSE-SU-2026:21693-1 Security update for python-h2

This update for python-h2 fixes the following issue: - CVE-2026-71554: duplicate Host headers are accepted and forwarded to consuming applications, which can lead to request smuggling bsc1274386...

CVE-2026-77087: Missing Authorization

Paperclip before 0.3.1 in default localtrusted mode fails to validate Host headers, allowing attackers to execute arbitrary commands via DNS rebinding. An attacker can craft a malicious webpage that, when visited by a developer running Paperclip locally, uses DNS rebinding to make authenticated A...

PYSEC-2026-3628 h2: Duplicate Host header could facilitate request smuggling

Impact h2 =4.4.0 accepts request header blocks containing more than one Host header, and forwards every Host header to the consuming application. Where the consumer downgrades HTTP/2 to HTTP/1.1, the resulting request carries two Host header lines, which is a request smuggling primitive CWE-444...

Linux Distros Unpatched Vulnerability : CVE-2026-71554

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - h2 is a pure-Python implementation of a HTTP/2 protocol stack. Versions up to and including 4.4.0 accept request header blocks containing more than one Host...

CVE-2026-71554

h2 is a pure-Python implementation of a HTTP/2 protocol stack. Versions up to and including 4.4.0 accept request header blocks containing more than one Host header, and forward every Host header to the consuming application. Where the consumer downgrades HTTP/2 to HTTP/1.1, the resulting request...

DEBIAN-CVE-2026-71554

h2 is a pure-Python implementation of a HTTP/2 protocol stack. Versions up to and including 4.4.0 accept request header blocks containing more than one Host header, and forward every Host header to the consuming application. Where the consumer downgrades HTTP/2 to HTTP/1.1, the resulting request...

UBUNTU-CVE-2026-71554

h2 is a pure-Python implementation of a HTTP/2 protocol stack. Versions up to and including 4.4.0 accept request header blocks containing more than one Host header, and forward every Host header to the consuming application. Where the consumer downgrades HTTP/2 to HTTP/1.1, the resulting request...

HTTP Request Smuggling

Overview h2 is a Pure-Python HTTP/2 protocol implementation Affected versions of this package are vulnerable to HTTP Request Smuggling via the processing of HTTP/2 request headers containing multiple Host headers. An attacker can interfere with downstream HTTP/1.1 applications by crafting request...

EUVD-2026-54177

h2 is a pure-Python implementation of a HTTP/2 protocol stack. Versions up to and including 4.4.0 accept request header blocks containing more than one Host header, and forward every Host header to the consuming application. Where the consumer downgrades HTTP/2 to HTTP/1.1, the resulting request...

CVE-2026-0516

A improper neutralization of HTTP Headers for Scripting Syntax vulnerability in SonicOS could allow a remote attacker to manipulate the Host header and redirect firewall management users to arbitrary web domains...

CVE-2026-63118 MCP Ruby SDK: Streamable HTTP transport lacks DNS-rebinding (Host/Origin) protection

MCP Ruby SDK is the official Ruby SDK for Model Context Protocol servers and clients. Prior to 0.23.0, MCP::Server::Transports::StreamableHTTPTransport in the mcp gem does not validate the HTTP Host or Origin request headers, which allows a malicious browser page to use DNS rebinding to reach a...

CVE-2026-64649: Server-Side Request Forgery (SSRF)

Next.js is a React framework for building full-stack web applications. In versions 14.1.1 through 15.5.20 and 16.0.0 through 16.2.10, when a Server Action forwards or redirects a request, an attacker can cause the server to send that outbound request to a malicious host Server-Side Request Forger...

Next.js Framework 14.1.1 < 15.5.21 / 16.x < 16.2.11 SSRF

The Next.js Framework on the remote host is affected by a server-side request forgery vulnerability: - When a Server Action forwards or redirects a request, an attacker can cause the server to send that outbound request to a malicious host Server-Side Request Forgery. This requires the attacker's...

Improper Handling Of Duplicate Host Headers

io.netty, netty-codec-http2 is vulnerable to Improper Handling of Duplicate Host Headers. The vulnerability is due to the HTTP/2-to-HTTP/1.x translation layer failing to deduplicate or validate Host headers when both the :authority pseudo-header and a literal Host header are present, which allows...

SUSE-SU-2026:3207-1 Security update for python-aiohttp

This update for python-aiohttp fixes the following issues - CVE-2026-22815: insufficient restrictions in header/trailer handling can cause uncapped memory usage and a denial of service bsc1261320. - CVE-2026-34513: unbounded DNS cache can cause a excessive memory usage and lead to a denial of...