CVE-2026-25540

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

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-2026-25540

Mastodon prior to versions 4.3.19, 4.4.13, and 4.5.6 is vulnerable to web cache poisoning in Rails.cache when AUTHORIZED_FETCH is enabled. The ActivityPub endpoints for pinned posts and featured hashtags cache responses that depend on the signer’s account, but the internal cache reuse does not re...

EUVD-2026-5329

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-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-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-2026-25540

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-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...

CVE-2026-25518

cert-manager adds certificates and certificate issuers as resource types in Kubernetes clusters, and simplifies the process of obtaining, renewing and using those certificates. In versions from 1.18.0 to before 1.18.5 and from 1.19.0 to before 1.19.3, the cert-manager-controller performs DNS...

Microsoft Develops Scanner to Detect Backdoors in Open-Weight Large Language Models

Microsoft on Wednesday said it built a lightweight scanner that it said can detect backdoors in open-weight large language models LLMs and improve the overall trust in artificial intelligence AI systems. The tech giant's AI Security team said the scanner leverages three observable signals that ca...

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,...

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...

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...

CVE-2025-69207

Khoj is a self-hostable artificial intelligence app. Prior to 2.0.0-beta.23, an IDOR in the Notion OAuth callback allows an attacker to hijack any user's Notion integration by manipulating the state parameter. The callback endpoint accepts any user UUID without verifying the OAuth flow was...