CVE-2026-54025 LibreChat: Stored XSS via unescaped image alt text in markdown artifact preview

LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, there is a vulnerability in LibreChat's markdown artifact preview pipeline. The marked library v15.0.12 does not HTML-escape double-quote characters in image alt text when a custom renderer falls throu...

CVE-2026-48942

Affected software: K2 extension for Joomla (getk2.com), version constraint listed as K2 ≤ 2.26. Vulnerability: two templates render the database column __#k2_users.image directly into HTML src attributes without HTML escaping, revealing a stored-XSS risk. Root cause: lack of escaping when injecti...

CVE-2026-48942 Joomla Extension - getk2.org - Stored-XSS in K2 extension for Joomla < 2.26

K2 ≤ 2.26 renders the k2users.image column directly into HTML src attributes via two distinct templates, in both cases without HTML escaping...

CVE-2026-48942

K2 ≤ 2.26 renders the k2users.image column directly into HTML src attributes via two distinct templates, in both cases without HTML escaping...

CVE-2026-48942

K2 ≤ 2.26 renders the k2users.image column directly into HTML src attributes via two distinct templates, in both cases without HTML escaping...

Cross-site Scripting (XSS)

Astro is vulnerable to Cross-Site Scripting XSS. The vulnerability is due to improper HTML escaping of named slot content inserted into the data-astro-template attribute when using client: directives, which allows an attacker to break out of the attribute context and inject arbitrary HTML or...

PT-2026-49739

Name of the Vulnerable Software and Affected Versions Astro versions prior to 6.4.6 Description The spreadAttributes function in the server-side rendering pipeline iterates over object keys and passes them to the addAttribute function, which interpolates the key into the HTML output without...

CVE-2026-54395

CVE-2026-54395 affects MISP (UiBeta event index view) with a reflected XSS in the advanced filter popup. The urlparams value is inserted into an inline JavaScript handler inside a single-quoted string; browsers HTML-decode attribute values before JS parsing, enabling an attacker to craft a URL th...

EUVD-2026-36581

A stored cross-site scripting vulnerability exists in MISP when the Overmind theme is used. The setHomePage endpoint previously saved the user-controlled path value through setSettingInternal, bypassing the normal setSetting validation logic, including validatehomepage, which requires homepage...

PT-2026-48997

Name of the Vulnerable Software and Affected Versions MISP affected versions not specified Description A reflected cross-site scripting issue exists in the UiBeta event index view. The urlparams value is inserted into an inline JavaScript handler using HTML escaping within a single-quoted...

PT-2026-48995

A stored cross-site scripting vulnerability exists in MISP when the Overmind theme is used. The setHomePage endpoint previously saved the user-controlled path value through setSettingInternal, bypassing the normal setSetting validation logic, including validate homepage, which requires homepage...

CVE-2026-53693 MISP BSimVis stored cross-site scripting in tag and cluster rendering paths via unescaped tag metadata and UI labels

A stored cross-site scripting vulnerability existed in MISP BSimVis tag rendering code. Several client-side rendering paths interpolated tag names, collection names, entity identifiers, cluster names, and tag metadata directly into HTML, HTML attributes, inline JavaScript event handlers, and CSS...

CVE-2026-53693

CVE-2026-53693 (MISP BSimVis) describes a stored cross-site scripting vulnerability in BSimVis tag rendering paths. Several client-side routes interpolated tag names, collection names, entity identifiers, cluster names, and tag metadata directly into HTML, HTML attributes, inline JavaScript, and ...

PT-2026-48470

A stored cross-site scripting vulnerability existed in MISP BSimVis tag rendering code. Several client-side rendering paths interpolated tag names, collection names, entity identifiers, cluster names, and tag metadata directly into HTML, HTML attributes, inline JavaScript event handlers, and CSS...

Twig: XSS in profiler HtmlDumper via unescaped template and profile names

Description Twig\Profiler\Dumper\HtmlDumper writes Profile::getTemplate and Profile::getName straight into its HTML output without escaping: php protected function formatTemplateProfile $profile, $prefix: string return \sprintf'%s└ %s', $prefix, self::$colors'template', $profile-getTemplate; The...

CVE-2026-9309

Firefox for iOS Reader View did not properly escape HTML tags in JSON-LD metadata. A malicious page could inject markup that changed Reader View behavior and leaked sensitive URL parameters. These parameters could then be used to access internal pages, potentially resulting in arbitrary JavaScrip...

CVE-2026-43979

Local Deep Research is an AI-powered research assistant for deep, iterative research. Prior to 1.6.0, PDFService.markdowntohtml constructs an HTML document by interpolating user-controlled values — specifically title sourced from research.title or research.query and metadata key-value pairs —...

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...

CVE-2026-44903

Prometheus is an open-source monitoring system and time series database. From 2.49.0 to before 3.5.3 and 3.11.3, in the Prometheus server's legacy web UI enabled via the command-line flag --enable-feature=old-ui, the histogram heatmap chart view does not escape le label values when inserting them...

CVE-2026-42197

RELATE is a web-based courseware package. Versions prior to commit 555f0efb1c5bd7531c07cd73724d7e566a81f620 have a stored cross-site scripting vulnerability that allows any enrolled student to execute arbitrary JavaScript in an administrator's browser session, potentially leading to full admin...