CVE-2026-46636

A flaw was found in Twig, a template language for PHP. The SecurityPolicy::checkMethodAllowed function unconditionally whitelists all method calls on instances of Twig\Markup and its subclasses. This allows an attacker, by passing an object of a Markup-derived class into a sandboxed template, to...

CVE-2026-49400

October System provides the system module for October Content Management System. Prior to versions 3.7.17 and 4.2.21, the backend SessionMaker trait stored widget session state as base64serialize... and consumed it with unserialize without an allowedclasses restriction. Any code path that could...

October CMS: Incomplete Scheme Validation in Image Resizer

The image resizer classified external sources by testing whether the source string began with the substring http, and the string-source branch in ResizeImageItem::fromObject accepted any value containing :// as a URL. As a result, non-https PHP stream wrappers such as phar://, file:// and ftp://...

GHSA-2XMM-M4WV-3FJH October CMS: Incomplete Scheme Validation in Image Resizer

The image resizer classified external sources by testing whether the source string began with the substring http, and the string-source branch in ResizeImageItem::fromObject accepted any value containing :// as a URL. As a result, non-https PHP stream wrappers such as phar://, file:// and ftp://...

CVE-2026-49400

October CMS (System module) prior to v3.7.17 and v4.2.21 is affected by a PHP object injection vulnerability in the backend SessionMaker trait, which stored widget session state as base64(serialize(...)) and deserialized it with unserialize() without an allowed_classes restriction. Exploitation r...

CVE-2026-49400 October CMS: PHP Object Injection via Backend Widget Session Storage

October System provides the system module for October Content Management System. Prior to versions 3.7.17 and 4.2.21, the backend SessionMaker trait stored widget session state as base64serialize... and consumed it with unserialize without an allowedclasses restriction. Any code path that could...

EUVD-2026-77682

October System provides the system module for October Content Management System. Prior to versions 3.7.17 and 4.2.21, the backend SessionMaker trait stored widget session state as base64serialize... and consumed it with unserialize without an allowedclasses restriction. Any code path that could...

CVE-2026-49400 October CMS: PHP Object Injection via Backend Widget Session Storage

October System provides the system module for October Content Management System. Prior to versions 3.7.17 and 4.2.21, the backend SessionMaker trait stored widget session state as base64serialize... and consumed it with unserialize without an allowedclasses restriction. Any code path that could...

October CMS: PHP Object Injection via Backend Widget Session Storage

The backend SessionMaker trait stored widget session state as base64serialize... and consumed it with unserialize without an allowedclasses restriction. Any code path that could write to a widget. session key with attacker-controlled bytes could trigger PHP object injection the next time the widg...

Deserialization of Untrusted Data

Overview october/system is a System module for October CMS. Affected versions of this package are vulnerable to Deserialization of Untrusted Data in the SessionMaker process. An attacker can execute arbitrary PHP code by injecting a crafted serialized payload into the widget. session key, which i...

GHSA-2FF2-MX52-Q8WP October CMS: PHP Object Injection via Backend Widget Session Storage

The backend SessionMaker trait stored widget session state as base64serialize... and consumed it with unserialize without an allowedclasses restriction. Any code path that could write to a widget. session key with attacker-controlled bytes could trigger PHP object injection the next time the widg...

Wordfence Argus Identifies Two Critical Unauthenticated Vulnerability Chains Leading to Remote Code Execution in The Events Calendar Plugin

On August 21 and August 22, 2026, Wordfence Argus, created by the Wordfence Threat Intelligence team, identified two independent critical vulnerability chains in The Events Calendar, a WordPress plugin active on more than 600,000 websites. Both chains begin in the plugin's widget-rendering pipeli...

EUVD-2026-77617

Laravel MagicLink creates links for authentication without a password or for accessing private content. From 2.0.0 until 2.25.1, MagicLink stores serialized action objects in the magiclinks.action database column and deserializes them through src/MagicLink.php and src/Actions/ResponseAction.php...

Astra Linux – Vulnerability in PHP 8.1, PHP 7.3

In PHP versions 8.1. before 8.1.31, 8.2. before 8.2.26, and 8.3. before 8.3.14, uncontrolled long string inputs to the ldapescape function on 32-bit systems can lead to an integer overflow, resulting in an out-of-bounds write...

Astra Linux – Vulnerability in PHP 7.3

In PHP versions 7.3.x below 7.3.26, 7.4.x below 7.4.14, and 8.0.0, when validating URLs using functions like filtervar$url, FILTERVALIDATEURL, PHP will accept a URL with an invalid password as a valid URL. This may cause functions that rely on the validity of URLs to misinterpret the URL and...

Astra Linux – Vulnerability in PHP 7.3

In PHP 8.0.X before 8.0.28, 8.1.X before 8.1.16, and 8.2.X before 8.2.3, an excessive number of parts in HTTP form uploads can lead to high resource consumption and an excessive number of log entries. This can cause a denial of service on the affected server by exhausting CPU resources or disk...

Astra Linux – Vulnerability in PHP 7.3

In PHP versions 7.4.x below 7.4.30, 8.0.x below 8.0.20, and 8.1.x below 8.1.7, when the pdomysql extension with the mysqlnd driver is used, if the third-party provider is allowed to provide the host and the connection password, an excessively long password can trigger a buffer overflow in PHP,...

Astra Linux – Vulnerability in PHP 8.1, PHP 7.3

In PHP versions starting from 8.1. up to 8.1.32, and from 8.2. up to 8.2.28, and from 8.3. up to 8.3.19, as well as in PHP versions starting from 8.4. up to 8.4.5, there is a limitation on the size of the location parameter due to the limited size of the location buffer, which is set to 1024...

Astra Linux – Vulnerability in PHP 8.1, PHP 7.3

In PHP versions 8.1. before 8.1.34, 8.2. before 8.2.30, 8.3. before 8.3.29, 8.4. before 8.4.16, 8.5. before 8.5.1, a heap buffer overflow occurs in the arrayMerge function when the total number of elements in packed arrays exceeds 32-bit limits or HTMAXSIZE. This issue is caused by an integer...

Astra Linux – Vulnerability in PHP 8.1, PHP 7.3

In PHP versions 8.1. before 8.1.33, 8.2. before 8.2.29, 8.3. before 8.3.23, and 8.4. before 8.4.10, when parsing XML data in SOAP extensions, overly large 2Gb XML namespace prefixes may lead to null pointer dereferencing. This can result in crashes and affect the availability of the target server...