FreeBSD -- pf silently ignores certain rules

Problem Description: A regression in the way hashes were calculated caused rules containing the address range syntax x.x.x.x - y.y.y.y that only differ in the address ranges involved to be silently dropped as duplicates. Only the first of such rules is actually loaded into pf. Ranges expressed...

Linux kernel 安全漏洞

The Linux kernel is the kernel used by the Linux operating system developed by the Linux Foundation in the United States. There is a security vulnerability in the Linux kernel, which stems from unvalidated overlap of open intervals, potentially allowing bypasses in the validation of collection...

Kibana 8.x < 8.19.12 / 9.x < 9.2.6 / 9.3.x < 9.3.1 Missing Authorization (ESA-2026-19)

The version of Kibana installed on the remote host is prior to 8.19.12, 9.2.6, or 9.3.1. It is, therefore, affected by a vulnerability as referenced in the ESA-2026-19 advisory. - Missing Authorization CWE-862 in Kibana's server-side Detection Rule Management can lead to Unauthorized Endpoint...

WordPress User Registration & Membership plugin <= 5.1.4 - Missing Authorization to Authenticated (Contributor+) Content Access Rule Manipulation vulnerability

Missing Authorization to Authenticated Contributor+ Content Access Rule Manipulation vulnerability discovered by darkmode in WordPress Plugin User Registration versions = 5.1.4...

Auditing MCP Servers for Over-Privileged Tool Capabilities

The Model Context Protocol MCP has emerged as a standard for connecting Large Language Models LLMs to external tools and data. However, MCP servers often expose privileged capabilities, such as file system access, network requests, and command execution that can be exploited if not properly...

SUSE CVE-2026-23274

In the Linux kernel, the following vulnerability has been resolved: netfilter: xtIDLETIMER: reject rev0 reuse of ALARM timer labels IDLETIMER revision 0 rules reuse existing timers by label and always call modtimer on timer-timer. If the label was created first by revision 1 with XTIDLETIMERALARM...

CTI-REALM: A new benchmark for end-to-end detection rule generation with AI agents

Excerpt: CTI-REALM is Microsoft’s open-source benchmark for evaluating AI agents on real-world detection engineering—turning cyber threat intelligence CTI into validated detections. Instead of measuring “CTI trivia,” CTI-REALM tests end-to-end workflows: reading threat reports, exploring telemetr...

CVE-2026-26939

A flaw was found in Kibana. An authenticated attacker with rule management privileges could exploit a missing authorization vulnerability in the server-side Detection Rule Management. This allows the attacker to configure unauthorized endpoint response actions, such as host isolation, process...

EUVD-2026-13610

In the Linux kernel, the following vulnerability has been resolved: netfilter: xtIDLETIMER: reject rev0 reuse of ALARM timer labels IDLETIMER revision 0 rules reuse existing timers by label and always call modtimer on timer-timer. If the label was created first by revision 1 with XTIDLETIMERALARM...

UBUNTU-CVE-2026-23274

In the Linux kernel, the following vulnerability has been resolved: netfilter: xtIDLETIMER: reject rev0 reuse of ALARM timer labels IDLETIMER revision 0 rules reuse existing timers by label and always call modtimer on timer-timer. If the label was created first by revision 1 with XTIDLETIMERALARM...

CVE-2026-32811 Heimdall: Path received via Envoy gRPC corrupted when containing query string

Heimdall is a cloud native Identity Aware Proxy and Access Control Decision service. When using Heimdall in envoy gRPC decision API mode with versions 0.7.0-alpha through 0.17.10, wrong encoding of the query URL string allows rules with non-wildcard path expressions to be bypassed. Envoy splits t...

CVE-2026-32811

This CVE affects Heimdall (cloud-native Identity Aware Proxy/Access Control). In envoy gRPC decision API mode, versions 0.7.0-alpha through 0.17.10 suffer from incorrect encoding of the URL query string when constructing the Path, causing parameters like /mypath?foo=bar to be escaped to /mypath%3...

CVE-2026-32811 Heimdall: Path received via Envoy gRPC corrupted when containing query string

Heimdall is a cloud native Identity Aware Proxy and Access Control Decision service. When using Heimdall in envoy gRPC decision API mode with versions 0.7.0-alpha through 0.17.10, wrong encoding of the query URL string allows rules with non-wildcard path expressions to be bypassed. Envoy splits t...

PT-2026-26778

Name of the Vulnerable Software and Affected Versions Ory Oathkeeper affected versions not specified Description Ory Oathkeeper is susceptible to an authorization bypass due to a path traversal issue. An attacker can potentially bypass security checks by crafting URLs with path traversal sequence...

EUVD-2026-13143

Missing Authorization CWE-862 in Kibana’s server-side Detection Rule Management can lead to Unauthorized Endpoint Response Action Configuration host isolation, process termination, and process suspension via CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs. This requires an...

CVE-2026-26939

Missing Authorization CWE-862 in Kibana’s server-side Detection Rule Management can lead to Unauthorized Endpoint Response Action Configuration host isolation, process termination, and process suspension via CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs. This requires an...

You have to invite them in

Welcome to this week's edition of the Threat Source newsletter. I found myself watching the Oscars ceremony in its entirety for the first time in a few years. I'm in the U.K., so I watched it the following day. With next week's Year in Review launch looming and several pieces of content still to...

Missing Authorization

Overview kibana is an open source Apache Licensed, browser-based analytics and search dashboard for Elasticsearch. Affected versions of this package are vulnerable to Missing Authorization in the Detection Rule Management. An attacker can perform unauthorized system actions, such as host isolatio...

CVE-2026-26939 Missing Authorization in Kibana Leading to Unauthorized Endpoint Response Action Configuration

Missing Authorization CWE-862 in Kibana’s server-side Detection Rule Management can lead to Unauthorized Endpoint Response Action Configuration host isolation, process termination, and process suspension via CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs. This requires an...

CVE-2026-26939 Missing Authorization in Kibana Leading to Unauthorized Endpoint Response Action Configuration

Missing Authorization CWE-862 in Kibana’s server-side Detection Rule Management can lead to Unauthorized Endpoint Response Action Configuration host isolation, process termination, and process suspension via CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs. This requires an...