CVE-2026-25540 Mastodon's signature-dependent ActivityPub collection responses cached under signature-independent keys (Web Cache Poisoning via `Rails.cache`)

Mastodon is a free, open-source social network server based on ActivityPub. Prior to versions 4.3.19, 4.4.13, 4.5.6, Mastodon is vulnerable to web cache poisoning via Rails.cache. When AUTHORIZEDFETCH is enabled, the ActivityPub endpoints for pinned posts and featured hashtags have contents that...

CVE-2024-51451 Multiple Vulnerabilities in IBM Concert Software

IBM Concert 1.0.0 through 2.1.0 is vulnerable to HTTP header injection, caused by improper validation of input by the HOST headers. This could allow an attacker to conduct various attacks against the vulnerable system, including cross-site scripting, cache poisoning or session hijacking...

CVE-2024-51451

IBM Concert 1.0.0 through 2.1.0 is vulnerable to HTTP header injection, caused by improper validation of input by the HOST headers. This could allow an attacker to conduct various attacks against the vulnerable system, including cross-site scripting, cache poisoning or session hijacking...

CVE-2024-51451 Multiple Vulnerabilities in IBM Concert Software

IBM Concert 1.0.0 through 2.1.0 is vulnerable to HTTP header injection, caused by improper validation of input by the HOST headers. This could allow an attacker to conduct various attacks against the vulnerable system, including cross-site scripting, cache poisoning or session hijacking...

CVE-2024-51451

CVE-2024-51451 affects IBM Concert Software 1.0.0–2.1.0. The issue is HTTP header injection caused by improper validation of HOST headers, enabling attacks such as cross-site scripting, cache poisoning, or session hijacking as described in IBM/NVD/Red Hat_ENISA entries. Remediation provided by IB...

Siemens SCALANCE and RUGGEDCOM Generation of Predictable Numbers or Identifiers (CVE-2025-10148)

curl's websocket code did not update the 32 bit mask pattern for each new outgoing frame as the specification says. Instead it used a fixed mask that persisted and was used throughout the entire connection. A predictable mask pattern allows for a malicious server to induce traffic between the two...

PT-2026-5868

Name of the Vulnerable Software and Affected Versions IBM Concert versions 1.0.0 through 2.1.0 Description IBM Concert is susceptible to HTTP header injection due to inadequate validation of the HOST headers. This issue could enable an attacker to perform various attacks against the system,...

PT-2026-6319

Name of the Vulnerable Software and Affected Versions Mastodon versions prior to 4.3.19 Mastodon versions prior to 4.4.13 Mastodon versions prior to 4.5.6 Description Mastodon, a free, open-source social network server based on ActivityPub, contains a flaw related to web cache poisoning. When the...

Mastodon 安全漏洞

Mastodon is an open-source social networking server based on ActivityPub. Versions of Mastodon prior to 4.3.19, 4.4.13, and 4.5.6 have security vulnerabilities. These vulnerabilities stem from web cache poisoning, which may lead to incorrect reuse of cached content...

CLSA-2026-1769687040 libsoup: Fix of CVE-2025-14523

CVE-2025-14523: reject duplicate Host headers to prevent request smuggling, cache poisoning, and host-based access control bypass attacks...

EulerOS 2.0 SP13 : bind (EulerOS-SA-2026-1217)

According to the versions of the bind packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : In specific circumstances, due to a weakness in the Pseudo Random Number Generator PRNG that is used, it is possible for an attacker to predict the...

EulerOS 2.0 SP13 : bind (EulerOS-SA-2026-1205)

According to the versions of the bind packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : In specific circumstances, due to a weakness in the Pseudo Random Number Generator PRNG that is used, it is possible for an attacker to predict the...

EulerOS Virtualization 2.10.1 : bind (EulerOS-SA-2026-1104)

According to the versions of the bind packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : Under certain circumstances, BIND is too lenient when accepting records from answers, allowing an attacker to inject forged data into...

libsoup: libsoup: Duplicate Host Header Handling Causes Host-Parsing Discrepancy (First- vs Last-Value Wins)

A flaw in libsoup’s HTTP header handling allows multiple Host: headers in a request and returns the last occurrence for server-side processing. Common front proxies often honor the first Host: header, so this mismatch can cause vhost confusion where a proxy routes a request to one backend but the...

libsoup: libsoup: Duplicate Host Header Handling Causes Host-Parsing Discrepancy (First- vs Last-Value Wins)

A flaw in libsoup’s HTTP header handling allows multiple Host: headers in a request and returns the last occurrence for server-side processing. Common front proxies often honor the first Host: header, so this mismatch can cause vhost confusion where a proxy routes a request to one backend but the...

libsoup: libsoup: Duplicate Host Header Handling Causes Host-Parsing Discrepancy (First- vs Last-Value Wins)

A flaw in libsoup’s HTTP header handling allows multiple Host: headers in a request and returns the last occurrence for server-side processing. Common front proxies often honor the first Host: header, so this mismatch can cause vhost confusion where a proxy routes a request to one backend but the...

CLSA-2026-1769598900 libsoup: Fix of CVE-2025-14523

CVE-2025-14523: reject duplicate Host headers to prevent request smuggling, cache poisoning, and host-based access control bypass attacks...

CLSA-2026-1769598671 libsoup: Fix of CVE-2025-14523

CVE-2025-14523: reject duplicate Host headers to prevent request smuggling, cache poisoning, and host-based access control bypass attacks...

Gakido vulnerable to HTTP Header Injection (CRLF Injection)

A vulnerability was discovered in Gakido that allowed HTTP Header Injection through CRLF Carriage Return Line Feed sequences in user-supplied header values and names. When making HTTP requests with user-controlled header values containing \r\n CRLF, \n LF, or \x00 null byte characters, an attacke...

CVE-2025-41082

Illegal HTTP request traffic vulnerability CL.0 in Altitude Communication Server, caused by inconsistent analysis of multiple HTTP requests over a single Keep-Alive connection using Content-Length headers. This can cause a desynchronization of requests between frontend and backend servers, which...