CVE-2026-91123: Improper Limitation of a Pathname to a Restricted Directory

Discourse is an open-source discussion platform. Prior to 2026.1.8, 2026.6.3, 2026.7.2, and 2026.8.0, the iframe src traversal guard did not treat literal backslashes as path separators after decoded dot segments. A crafted source could therefore pass an allowediframes subpath check while browser...

CVE-2026-91134: Improper Input Validation

Discourse is an open-source discussion platform. Prior to 2026.1.8, 2026.6.3, 2026.7.2, and 2026.8.0, the Discourse post sanitizer allowed a stored cross-origin iframe to bypass the allowediframes prefix policy when the iframe src contained encoded userinfo. The sanitizer validated a decoded form...

PT-2026-98161

Name of the Vulnerable Software and Affected Versions Discourse versions prior to 2026.1.8 Discourse versions prior to 2026.6.3 Discourse versions prior to 2026.7.2 Discourse versions prior to 2026.8.0 Description Sites using wildcard patterns in the allowed iframes setting may accept a crafted...

CVE-2026-91132: Origin Validation Error

Discourse is an open-source discussion platform. Prior to 2026.1.8, 2026.6.3, 2026.7.2, and 2026.8.0, sites using wildcard patterns in the allowediframes setting could accept a crafted iframe URL whose allowlisted suffix appeared after a URL authority separator. The wildcard origin check matched...

PT-2026-97711

Name of the Vulnerable Software and Affected Versions The Post Grid versions prior to 7.9.5 Description The plugin fails to limit the expansion of the WordPress allowed-HTML list to its own markup, applying the change site-wide. This allows users with the Contributor role and above to store ifram...

PT-2026-98154

Name of the Vulnerable Software and Affected Versions Discourse versions prior to 2026.1.8 Discourse versions prior to 2026.6.3 Discourse versions prior to 2026.7.2 Discourse versions prior to 2026.8.0 Description The post sanitizer allows a stored cross-origin iframe to bypass the allowed iframe...

CVE-2026-61823: Improper Neutralization of Input During Web Page Generation

code16 Sharp is a Laravel-based framework for building content-management and administrative interfaces. Versions before 9.22.5 contain a stored cross-site scripting vulnerability in the rich-text editor because the HTML sanitizer permits the srcdoc attribute on iframe elements. Although markup...

CVE-2026-94291

A flaw was found in Epiphany GNOME Web. The ephy-reader and view-source URI schemes are not registered as display-isolated, allowing a remote attacker to frame them from web content via iframes. This can be exploited to exfiltrate local files when a user visits a malicious website...

webkitgtk: Maliciously crafted web content may violate iframe sandboxing policy

A flaw was found in WebKitGTK. Processing malicious web content can violate the iframe sandboxing policy due to improper validation...

MAL-2026-16333 Malicious code in homestack-cheer (npm)

--- -= Per source details. Do not edit below this line.=- Source: amazon-inspector f475cd8b8a3e1dd4563ca0b20d85fde83576ed78c27eb91ca1cd77fbebe0d142 The package is published as homestack-cheer with description 'JS lib support cheerleading', but the README and the UMD build dist/my-lib.umd.js prese...

CVE-2026-63671: Improper Neutralization of Input During Web Page Generation

MDC is a tool to take regular Markdown and write documents interacting deeply with a Vue component. Prior to 0.22.1, @nuxtjs/mdc uses parseMarkdown with allowDangerousHtml enabled by default and relies on validateProps, validateProp, and unsafeLinkPrefix to remove executable URLs from untrusted...

CVE-2026-55692 EmbedVideo Extension: Stored XSS via malformed src url with $wgEmbedVideoRequireConsent enabled

The EmbedVideo Extension is a MediaWiki extension which adds a parser function called ev and various parser tags for embedding video clips from various video sharing services. Prior to 4.1.0, with the default $wgEmbedVideoRequireConsent configuration enabled,...

EUVD-2026-78205

Concrete CMS before 9.5.3 applied only trim to the YouTube block's stored width and height values and printed them into iframe HTML attributes without escaping or integer casting, resulting in stored cross-site scripting. A user with editblock permission could inject an event handler that execute...

CVE-2026-81900 Concrete CMS before 9.5.3 is vulnerable to Stored XSS in the YouTube block (vWidth/vHeight)

Concrete CMS before 9.5.3 applied only trim to the YouTube block's stored width and height values and printed them into iframe HTML attributes without escaping or integer casting, resulting in stored cross-site scripting. A user with editblock permission could inject an event handler that execute...

CVE-2026-81900 Concrete CMS before 9.5.3 is vulnerable to Stored XSS in the YouTube block (vWidth/vHeight)

Concrete CMS before 9.5.3 applied only trim to the YouTube block's stored width and height values and printed them into iframe HTML attributes without escaping or integer casting, resulting in stored cross-site scripting. A user with editblock permission could inject an event handler that execute...

Astra Linux – Vulnerability in WebKit2GTK

This issue has been addressed through improved enforcement of iframe sandboxing policies. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, watchOS 7.3, tvOS 14.4, iOS 14.4, and iPadOS 14.4. Maliciously crafted web content may violate...

Astra Linux – Vulnerability in Firefox and Thunderbird

It was possible to create specific XSLT markup that could bypass the iframe sandbox. This vulnerability affects Firefox ESR versions prior to 91.5, Firefox versions prior to 96, and Thunderbird versions prior to 91.5...

Astra Linux – Vulnerability in Chromium

In COOP mode in Google Chrome prior to version 98.0.4758.80, it was possible for a remote attacker to bypass the iframe sandbox through a crafted HTML page...

Astra Linux – Vulnerability in Firefox and Thunderbird

Due to a layout change, the contents of iframes might be rendered outside of their borders. This could lead to user confusion or spoofing attacks. This vulnerability affects Thunderbird 91.8, Firefox 99, and Firefox ESR 91.8...

Astra Linux – Vulnerability in Firefox and Thunderbird

When exiting fullscreen mode, an iframe could mislead the browser regarding the current state of fullscreen, potentially causing confusion for users or leading to spoofing attacks. This vulnerability affects Thunderbird 91.10, Firefox 101, and Firefox ESR 91.10...