Cross-site Scripting (XSS)

Overview ci4-cms-erp/ci4ms is a composer create-project ci4-cms-erp/ci4ms Affected versions of this package are vulnerable to Cross-site Scripting XSS through the filename field in the backup management module. An attacker can gain unauthorized access to user accounts and escalate privileges by...

CVE-2026-3254

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.11 before 18.11.1 that under certain conditions could have allowed an authenticated user to load unauthorized content into another user's browser due to improper input validation in the Mermaid sandbox...

CVE-2026-5816

CVE-2026-5816 affects GitLab CE/EE prior to 18.10.4 and prior to 18.11.1, with an issue in path validation that could allow an unauthenticated user to execute arbitrary JavaScript in a user’s browser session. GitLab has released patches in versions 18.10.4 and 18.11.1 to remediate this. The vulne...

CVE-2026-5816

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.10 before 18.10.4 and 18.11 before 18.11.1 that could have allowed an unauthenticated user to execute arbitrary JavaScript in a user's browser session due to improper path validation under certain conditions...

python: Python: Command-line option injection in webbrowser.open() via crafted URLs

A flaw was found in Python. The webbrowser.open API, used to launch web browsers, does not properly sanitize input. This allows a remote attacker to craft a malicious URL containing leading dashes. When such a URL is opened, certain web browsers may interpret these dashes as command-line options,...

Malicious trading website drops malware that hands your browser to attackers

During our threat hunting, we found a campaign using the same malware loader from our previous research to deliver a different threat: Needle Stealer , data-stealing malware designed to quietly harvest sensitive information from infected devices, including browser data, login sessions, and...

CVE-2026-6848

A flaw was found in Red Hat Quay. When Red Hat Quay requests password re-verification for sensitive operations, such as token generation or robot account creation, the re-authentication prompt can be bypassed. This allows a user with a timed-out session, or an attacker with access to an idle...

DeepL Chrome browser extension vulnerable to cross-site scripting

Overview DeepL Chrome browser extension contains the following vulnerability. Cross-site scripting CWE-79 - CVE-2026-40451 This vulnerability was reported by the researchers below and JPCERT/CC coordinated with the developer. Junki Yuasa of Cybozu, Inc. reported this vulnerability to JPCERT/CC...

CVE-2026-40451

DeepL Chrome browser extension versions from v1.22.0 to v.1.23.0 contain a cross-site scripting vulnerability, which allows an attacker to execute arbitrary script in a user's browser, and inject malicious HTML into web pages viewed by the user...

CVE-2026-6755

A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Mitigation bypass in the DOM: postMessage component...

CVE-2026-6779

A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Other issue in the JavaScript Engine component...

PT-2026-34522

Name of the Vulnerable Software and Affected Versions GitLab CE/EE versions 18.11 through 18.11.0 Description Improper input validation in the Mermaid sandbox could allow an authenticated user to load unauthorized content into another user's browser. Recommendations Update to version 18.11.1...

Stable Channel Update for ChromeOS / ChromeOS Flex

The ChromeOS Stable channel is being updated to OS version 16610.44.0 Browser version 147.0.7727.115 for most ChromeOS devices. If you find new issues, please let us know one of the following ways: 1. File a bug 2. Visit our ChromeOS communities 1. General: Chromebook Help Community 2. Beta...

PT-2026-34520

Name of the Vulnerable Software and Affected Versions GitLab CE/EE versions 18.10 through 18.10.3 GitLab CE/EE versions 18.11 through 18.11.0 Description An issue exists where improper path validation under certain conditions could allow an unauthenticated user to execute arbitrary JavaScript in ...

PT-2026-36880

Name of the Vulnerable Software and Affected Versions OpenC3 COSMOS versions prior to 7.0.0 Description The Command Sender UI uses an unsafe eval function on array-like command parameters. This allows a user-supplied payload to execute in the browser when sending a command, creating a self-XSS...

PT-2026-34541

Beghelli Sicuro24 SicuroWeb does not enforce a Content Security Policy, allowing unrestricted loading of external JavaScript resources from attacker-controlled origins. When chained with the template injection and sandbox escape vulnerabilities present in the same application, the absence of CSP...

OpenC3 COSMOS is Vulnerable to Self-XSS Through the Command Sender

Summary The Command Sender UI uses an unsafe eval function on array-like command parameters, which allows a user-supplied payload to execute in the browser when sending a command. This creates a self-XSS risk because an attacker can trigger their own script execution in the victim’s session, if...

EUVD-2026-24255

mailcow: dockerized is an open source groupware/email suite based on docker. In versions prior to 2026-03b, the Quarantine details modal injects attachment filenames into HTML without escaping, allowing arbitrary HTML/JS execution. An attacker can deliver an email with a crafted attachment name s...

Cross-site Scripting (XSS)

Overview Affected versions of this package are vulnerable to Cross-site Scripting XSS via the DataTable widget when a query parameter is rendered without proper output escaping. An attacker can execute arbitrary scripts in the context of the user's browser by tricking a user into visiting a craft...

python: Python: Command-line option injection in webbrowser.open() via crafted URLs

A flaw was found in Python. The webbrowser.open API, used to launch web browsers, does not properly sanitize input. This allows a remote attacker to craft a malicious URL containing leading dashes. When such a URL is opened, certain web browsers may interpret these dashes as command-line options,...