{"id":3956,"date":"2026-09-09T18:33:46","date_gmt":"2026-09-09T18:33:46","guid":{"rendered":"https:\/\/www.ucartz.com\/updates\/drupal-entity-share-websub-server-side-request-forgery-ssrf-vulnerability-cve-2026-73474-medium-severity\/"},"modified":"2026-09-09T18:33:49","modified_gmt":"2026-09-09T18:33:49","slug":"drupal-entity-share-websub-server-side-request-forgery-ssrf-vulnerability-cve-2026-73474-medium-severity","status":"publish","type":"post","link":"https:\/\/www.ucartz.com\/updates\/drupal-entity-share-websub-server-side-request-forgery-ssrf-vulnerability-cve-2026-73474-medium-severity\/","title":{"rendered":"Drupal Entity Share Websub Server-Side Request Forgery (SSRF) Vulnerability (CVE-2026-73474) \u2014 Medium Severity"},"content":{"rendered":"<p>A significant security concern has emerged for users of the Drupal Entity Share Websub module, a tool designed to facilitate content sharing between Drupal sites. Identified as CVE-2026-73474, this vulnerability involves a Server-Side Request Forgery (SSRF) flaw that could potentially allow attackers to trick the server into making unauthorized requests, posing a risk to the integrity and confidentiality of your web infrastructure.<\/p>\n<p>At its core, an SSRF vulnerability occurs when a web application is compelled to fetch a remote resource from a URL that is supplied by an attacker. Instead of accessing only the intended public resources, the server might be tricked into interacting with internal systems, querying sensitive local files, or communicating with other external services that it shouldn&#8217;t. This can have serious implications, potentially leading to the exposure of confidential information, bypassing firewall protections, or serving as a pivot point for further, more sophisticated attacks within your network environment.<\/p>\n<h2>CVE Details<\/h2>\n<p>The vulnerability directly impacts the Drupal Entity Share Websub module, which is used for web content syndication and sharing functionalities within the Drupal ecosystem.<\/p>\n<ul>\n<li><strong>Product:<\/strong> Drupal Entity Share Websub<\/li>\n<li><strong>Published Date:<\/strong> September 2, 2026<\/li>\n<li><strong>Severity:<\/strong> Medium (CVSS: 5.3)<\/li>\n<li><strong>Status:<\/strong> Analyzed<\/li>\n<\/ul>\n<h2>Affected Products<\/h2>\n<p>The Server-Side Request Forgery (SSRF) vulnerability, identified as CVE-2026-73474, specifically affects certain versions of the Drupal Entity Share Websub module. If you are leveraging this module for your content sharing needs, it&#8217;s critical to verify your installed version. The vulnerability is present in:<\/p>\n<ul>\n<li>Entity Share Websub versions from 0.0.0 up to and including 1.1.2.<\/li>\n<\/ul>\n<p>Any installations running within this version range are considered vulnerable and should be addressed promptly.<\/p>\n<h2>Current Status<\/h2>\n<p>As of September 9, 2026, this vulnerability has been officially &#8220;Analyzed.&#8221; This classification signifies that the details of the flaw have been thoroughly reviewed and confirmed by security experts. While the analysis is complete, users are strongly encouraged to proactively monitor the official Drupal security channels and the Entity Share Websub project page for any further announcements, especially regarding specific patch releases or updated versions that resolve this issue.<\/p>\n<h2>Severity Level<\/h2>\n<p>This SSRF vulnerability is rated with a &#8220;Medium&#8221; severity, indicated by a CVSS score of 5.3. A medium severity rating, while not at the highest tier of critical threats, still warrants immediate attention. The potential impact stems from an attacker&#8217;s ability to manipulate the server into making arbitrary requests. This could allow them to bypass internal firewalls, scan internal networks for other vulnerable systems, access sensitive data stored on the server, or even facilitate remote code execution in specific scenarios, depending on how the application handles the fetched resources. Therefore, neglecting this vulnerability could lead to significant compromise of your web application and underlying infrastructure.<\/p>\n<h2>Possible Solutions<\/h2>\n<p>Addressing an SSRF vulnerability like CVE-2026-73474 is paramount for maintaining the security posture of your Drupal installation. While specific patch details could not be retrieved directly from the primary reference at the time of writing, general and highly effective best practices for mitigating SSRF vulnerabilities include:<\/p>\n<ul>\n<li><strong>Immediate Module Update:<\/strong> The most crucial step is to diligently check the official Drupal.org security advisories for the Entity Share Websub module. As soon as a patched version is released, prioritize updating your module to eliminate the vulnerability. This is typically the most direct and effective solution.<\/li>\n<li><strong>Robust Input Validation:<\/strong> Implement rigorous validation and sanitization for all user-supplied URLs or any data that the application uses to construct requests to external resources. Ensure that only URLs conforming to strict, predefined patterns are ever processed.<\/li>\n<li><strong>Whitelist Approach:<\/strong> Configure your application to only allow outbound connections to a tightly controlled whitelist of trusted domains or IP addresses. This prevents the server from initiating connections to arbitrary, potentially malicious, internal or external endpoints.<\/li>\n<li><strong>Restrict Protocols:<\/strong> Limit the protocols the server can utilize for outgoing requests. If your application only needs to fetch resources via HTTP or HTTPS, disable or restrict access to other potentially dangerous protocols like <code>file:\/\/<\/code>, <code>gopher:\/\/<\/code>, or <code>ftp:\/\/<\/code>.<\/li>\n<li><strong>Network Segmentation and Least Privilege:<\/strong> Implement network segmentation to isolate the web server from sensitive internal systems. Additionally, ensure that the web application runs with the principle of least privilege, meaning it only has the necessary permissions to perform its intended functions, minimizing potential damage from a successful exploit.<\/li>\n<\/ul>\n<p>It is strongly recommended to regularly consult the official Drupal security advisories and the Entity Share Websub project page for the most accurate, module-specific remediation steps and to stay informed about any new security releases.<\/p>\n<h2>References<\/h2>\n<p>https:\/\/www.drupal.org\/sa-contrib-2026-097<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A significant security concern has emerged for users of the Drupal Entity Share Websub module, a tool designed to facilitate content sharing between Drupal sites. Identified as CVE-2026-73474, this vulnerability involves a Server-Side Request Forgery (SSRF) flaw that could potentially allow attackers to trick the server into making unauthorized requests, posing a risk to the [&hellip;]<\/p>\n","protected":false},"author":17,"featured_media":2546,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[691,1229,868,696,695],"class_list":["post-3956","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-security","tag-drupal","tag-entity-share-websub","tag-ssrf","tag-vulnerability","tag-web-security"],"blocksy_meta":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Drupal Entity Share Websub Server-Side Request Forgery (SSRF) Vulnerability (CVE-2026-73474) \u2014 Medium Severity - Web Hosting and IT Consultancy Services<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ucartz.com\/updates\/drupal-entity-share-websub-server-side-request-forgery-ssrf-vulnerability-cve-2026-73474-medium-severity\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Drupal Entity Share Websub Server-Side Request Forgery (SSRF) Vulnerability (CVE-2026-73474) \u2014 Medium Severity - Web Hosting and IT Consultancy Services\" \/>\n<meta property=\"og:description\" content=\"A significant security concern has emerged for users of the Drupal Entity Share Websub module, a tool designed to facilitate content sharing between Drupal sites. 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