CVE-2026-12882 Mattermost Markdown autolink parsing denial of service

Mattermost versions 11.9.x = 11.9.0, 11.8.x = 11.8.4, 11.7.x = 11.7.7, 10.11.x = 10.11.22 fail to parse Markdown autolinks with unmatched trailing closing parentheses in linear time, which allows an authenticated user with permission to create posts to cause excessive server CPU consumption and...

CVE-2026-12882 Mattermost Markdown autolink parsing denial of service

Mattermost versions 11.9.x = 11.9.0, 11.8.x = 11.8.4, 11.7.x = 11.7.7, 10.11.x = 10.11.22 fail to parse Markdown autolinks with unmatched trailing closing parentheses in linear time, which allows an authenticated user with permission to create posts to cause excessive server CPU consumption and...

EUVD-2026-77363

Mattermost versions 11.9.x = 11.9.0, 11.8.x = 11.8.4, 11.7.x = 11.7.7, 10.11.x = 10.11.22 fail to parse Markdown autolinks with unmatched trailing closing parentheses in linear time, which allows an authenticated user with permission to create posts to cause excessive server CPU consumption and...

CLSA-2026-1789374715 TuxCare security update for markdown-it (1 CVE)

TuxCare rebuilt markdown-it to address 1 CVE. Fixed in 4.4.0-tuxcare.1...

CVE-2026-12882: Inefficient Algorithmic Complexity

Mattermost versions 11.9.x = 11.9.0, 11.8.x = 11.8.4, 11.7.x = 11.7.7, 10.11.x = 10.11.22 fail to parse Markdown autolinks with unmatched trailing closing parentheses in linear time, which allows an authenticated user with permission to create posts to cause excessive server CPU consumption and...

Important: python-mistune

Issue Overview: Mistune is a Python Markdown parser with renderers and plugins. Versions 3.3.0 through 3.3.2 are vulnerable to DoS through deeply nested tokens. HTML rendering creates deeply nested emphasis tokens from consecutive asterisk characters, and recursive rendering in...

PT-2026-91239

Mattermost versions 11.9.x = 11.9.0, 11.8.x = 11.8.4, 11.7.x = 11.7.8, 10.11.x = 10.11.22 fail to limit the nesting depth in the server-side Markdown parser which allows an authenticated attacker to cause a denial of service CPU resource exhaustion via a crafted post containing deeply nested...

PT-2026-91142

Mattermost versions 11.9.x = 11.9.0, 11.8.x = 11.8.4, 11.7.x = 11.7.7, 10.11.x = 10.11.22 fail to parse Markdown autolinks with unmatched trailing closing parentheses in linear time, which allows an authenticated user with permission to create posts to cause excessive server CPU consumption and...

CVE-2026-86349: Inefficient Algorithmic Complexity

Mattermost versions 11.9.x = 11.9.0, 11.8.x = 11.8.4, 11.7.x = 11.7.8, 10.11.x = 10.11.22 fail to limit the nesting depth in the server-side Markdown parser which allows an authenticated attacker to cause a denial of service CPU resource exhaustion via a crafted post containing deeply nested...

Amazon Linux 2023 : python3-mistune (ALAS2023-2026-2148)

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-2148 advisory. Mistune is a Python Markdown parser with renderers and plugins. Versions 3.3.0 through 3.3.2 are vulnerable to DoS through deeply nested tokens. HTML rendering creates deeply nested emphasis tokens fro...

Linux Distros Unpatched Vulnerability : CVE-2024-58382

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - league/commonmark versions before 2.6.0 contain polynomial time complexity vulnerabilities in Markdown parsing that allow attackers to cause denial of service...

CVE-2026-49865

Kimai is an open-source time tracking application. Versions prior to 2.58.0 contain a server-side request forgery vulnerability in their invoice PDF preview and generation workflow. If an attacker can control Markdown content that is later rendered into an invoice PDF, such as Customer.invoiceTex...

CVE-2026-49865 Kimai has Server-Side Request Forgery in Invoice PDF Rendering via Markdown Image URLs

Kimai is an open-source time tracking application. Versions prior to 2.58.0 contain a server-side request forgery vulnerability in their invoice PDF preview and generation workflow. If an attacker can control Markdown content that is later rendered into an invoice PDF, such as Customer.invoiceTex...

CVE-2026-49865

Kimai , an open-source time tracking application, versions prior to 2.58.0 are affected by a Server-Side Request Forgery (SSRF) in the invoice PDF preview and generation workflow. The root cause is that user-controlled Markdown fields (e.g., Customer.invoiceText) pass through an md2html filter in...

CVE-2026-49865 Kimai has Server-Side Request Forgery in Invoice PDF Rendering via Markdown Image URLs

Kimai is an open-source time tracking application. Versions prior to 2.58.0 contain a server-side request forgery vulnerability in their invoice PDF preview and generation workflow. If an attacker can control Markdown content that is later rendered into an invoice PDF, such as Customer.invoiceTex...

CVE-2026-49865 Kimai has Server-Side Request Forgery in Invoice PDF Rendering via Markdown Image URLs

Kimai is an open-source time tracking application. Versions prior to 2.58.0 contain a server-side request forgery vulnerability in their invoice PDF preview and generation workflow. If an attacker can control Markdown content that is later rendered into an invoice PDF, such as Customer.invoiceTex...

EUVD-2026-76765

Kimai is an open-source time tracking application. Versions prior to 2.58.0 contain a server-side request forgery vulnerability in their invoice PDF preview and generation workflow. If an attacker can control Markdown content that is later rendered into an invoice PDF, such as Customer.invoiceTex...

Security Bulletin: IBM Cognos Analytics 12.0.4 and 12.1.3 versions are affected by security vulnerabilities

Summary There are vulnerabilities identified in Cognos Analytics application and its open source components. These vulnerabilties has been resolved and the remediation versions is provided below. Vulnerability Details CVEID:CVE-2024-56344 DESCRIPTION: IBM Cognos Analytics could allow a remote...

CVE-2026-49865: Server-Side Request Forgery (SSRF)

Kimai is an open-source time tracking application. Versions prior to 2.58.0 contain a server-side request forgery vulnerability in their invoice PDF preview and generation workflow. If an attacker can control Markdown content that is later rendered into an invoice PDF, such as Customer.invoiceTex...

Trestle has Server-Side Template Injection (SSTI) via Recursive Template Re-evaluation of Untrusted Data

ImpactA Server-Side Template Injection SSTI vulnerability exists in multiple locations of trestle's Jinja2 rendering pipeline due to a systemic pattern: untrusted data is re-parsed as Jinja2 template source code without sandboxing. This advisory tracks the root cause across all affected code...