PT-2026-39263

Name of the Vulnerable Software and Affected Versions MCP Registry versions prior to 1.7.7 Description The public catalogue UI served at the 'GET /' endpoint is subject to stored cross-site scripting. This occurs via the server.websiteUrl field of published server.json files. The server-side...

PT-2026-39292

Name of the Vulnerable Software and Affected Versions Mistune affected versions not specified Description The math plugin in Mistune fails to sanitize user-supplied content when rendering inline math $...$ and block math $$...$$. The plugin concatenates raw input directly into the HTML output,...

GHSA-3V85-FQVH-7RXF Ech0's RSS feed renders unescaped tag names and raw-HTML markdown, stored XSS against subscribers

Summary The public RSS/Atom feed at /rss renders two attacker-controlled surfaces without HTML escaping. Tag names flow through fmt.AppendfrenderedContent, "%s", tag.Name at internal/service/common/common.go:120, and the Markdown renderer at internal/util/md/md.go does not set the html.SkipHTML...

UBUNTU-CVE-2026-44742

Postorius through 1.3.13 does not escape HTML in the message subject when rendering it in the Held messages pop-up, as exploited in the wild in May 2026...

CVE-2026-44742

Postorius through 1.3.13 does not escape HTML in the message subject when rendering it in the Held messages pop-up, as exploited in the wild in May 2026...

VulnCheck KEV: CVE-2026-44742

Postorius through 1.3.13 does not escape HTML in the message subject when rendering it in the Held messages pop-up, as exploited in the wild in May 2026...

CVE-2026-44742

Postorius through 1.3.13 does not escape HTML in the message subject when rendering it in the Held messages pop-up, as exploited in the wild in May 2026...

CVE-2026-40296

PhpSpreadsheet is a pure PHP library for reading and writing spreadsheet files. The HTML writer skips htmlspecialchars escaping when a cell's formatted value differs from the original value. When a cell has a custom number format containing the text placeholder @ along with any additional literal...

EUVD-2026-28221

PhpSpreadsheet is a pure PHP library for reading and writing spreadsheet files. The HTML writer skips htmlspecialchars escaping when a cell's formatted value differs from the original value. When a cell has a custom number format containing the text placeholder @ along with any additional literal...

CVE-2026-40296

PhpSpreadsheet is a pure PHP library for reading and writing spreadsheet files. The HTML writer skips htmlspecialchars escaping when a cell's formatted value differs from the original value. When a cell has a custom number format containing the text placeholder @ along with any additional literal...

GHSA-V2V4-37R5-5V8G ip-address has XSS in Address6 HTML-emitting methods

Summary Address6.group and Address6.link do not HTML-escape attacker-controlled content before embedding it in the HTML strings they return, and AddressError.parseMessage emitted by the Address6 constructor for invalid input can contain unescaped attacker-controlled content in one branch. An...

PT-2026-37294

Name of the Vulnerable Software and Affected Versions AVideo versions prior to 29.1 Description An issue exists where the 'plugin/Meet/iframe.php' endpoint echoes the user and pass query parameters unescaped into a JavaScript double-quoted string literal within a block. This allows an attacker to...

PT-2026-37267

Name of the Vulnerable Software and Affected Versions ip-address versions prior to 10.1.1 Description The software fails to HTML-escape attacker-controlled content before embedding it in HTML strings. This occurs in the Address6.group and Address6.link functions, as well as within the...

CVE-2026-42090 Notesnook: RCE via stored XSS in note export rendering

Notesnook is a note-taking app focused on user privacy & ease of use. Prior to Notesnook Web/Desktop version 3.3.15 and prior to Notesnook iOS/Android version 3.3.20, a stored XSS vulnerability in the note export flow can be escalated to remote code execution in the desktop app. The root cause is...

PT-2026-35878

Name of the Vulnerable Software and Affected Versions PhpSpreadsheet affected versions not specified Description An HTML escaping bypass allows for Cross-Site Scripting XSS, a technique where malicious scripts are injected into otherwise trusted websites. Recommendations At the moment, there is n...

GHSA-GX2M-MCC2-R4P3 wlc: print_html outputs API data without HTML escaping

Impact The HTML output format in wlc embeds API response data into HTML without escaping, allowing cross-site scripting when the output is rendered in a browser. Patches https://github.com/WeblateOrg/wlc/pull/1327 Workarounds The only vulnerable code path is HTML output which is opt-in. Reference...

wlc: print_html outputs API data without HTML escaping

Impact The HTML output format in wlc embeds API response data into HTML without escaping, allowing cross-site scripting when the output is rendered in a browser. Patches https://github.com/WeblateOrg/wlc/pull/1327 Workarounds The only vulnerable code path is HTML output which is opt-in. Reference...

CVE-2026-41200

STIG Manager is an API and web client for managing Security Technical Implementation Guides STIG assessments of Information Systems. Versions 1.5.10 through 1.6.7 have a reflected Cross-Site Scripting XSS vulnerability in the OIDC authentication error handling code in src/init.js and...

EUVD-2026-25079

http.cookies.Morsel.jsoutput returns an inline snippet and only escapes " for JavaScript string context. It does not neutralize the HTML parser-sensitive sequence inside the generated script element. Mitigation base64-encodes the cookie value to disallow escaping using cookie value...

CVE-2026-40872

mailcow: dockerized is an open source groupware/email suite based on docker. In versions prior to 2026-03b, the admin dashboard's Autodiscover logs render the EMailAddress value logged as the "user" field without HTML escaping. By submitting an unauthenticated Autodiscover request with a crafted...