EEF-CVE-2026-53427 Cross-site scripting in MDEx via unescaped highlight_lines_class code-fence attribute

Summary Improper Neutralization of Input During Web Page Generation 'Cross-site Scripting' vulnerability in leandrocp MDEx allows stored or reflected cross-site scripting via attacker-controlled Markdown. When syntax highlighting and full info-string forwarding render: \full\info\string: true\ ar...

CVE-2026-12856

A flaw was found in the vscode-java extension, which provides Java language support for Visual Studio Code. The extension incorrectly trusts all Markdown content in JavaDoc hovers, allowing a malicious Java file to include hidden commands. If a user clicks a specially crafted link within a JavaDo...

EUVD-2026-40084

A flaw was found in the vscode-java extension, which provides Java language support for Visual Studio Code. The extension incorrectly trusts all Markdown content in JavaDoc hovers, allowing a malicious Java file to include hidden commands. If a user clicks a specially crafted link within a JavaDo...

CVE-2026-12856

A flaw was found in the vscode-java extension, which provides Java language support for Visual Studio Code. The extension incorrectly trusts all Markdown content in JavaDoc hovers, allowing a malicious Java file to include hidden commands. If a user clicks a specially crafted link within a JavaDo...

CVE-2026-12856 Vscode-java: vscode: command injection vulnerability in the javadoc hover provider of the vscode-java extension

A flaw was found in the vscode-java extension, which provides Java language support for Visual Studio Code. The extension incorrectly trusts all Markdown content in JavaDoc hovers, allowing a malicious Java file to include hidden commands. If a user clicks a specially crafted link within a JavaDo...

CVE-2026-12856 Vscode-java: vscode: command injection vulnerability in the javadoc hover provider of the vscode-java extension

A flaw was found in the vscode-java extension, which provides Java language support for Visual Studio Code. The extension incorrectly trusts all Markdown content in JavaDoc hovers, allowing a malicious Java file to include hidden commands. If a user clicks a specially crafted link within a JavaDo...

PT-2026-53687

Name of the Vulnerable Software and Affected Versions leandrocp mdex versions 0.8.3 through 0.13.1 Description Improper neutralization of input during web page generation allows cross-site scripting XSS via unsanitized URL schemes in Quill Delta output. The function to delta/2 converts Markdown...

PT-2026-53259

Name of the Vulnerable Software and Affected Versions vscode-java affected versions not specified Description The vscode-java extension, which provides Java language support for Visual Studio Code, incorrectly trusts all Markdown content in JavaDoc hovers. This allows a malicious Java file to...

[SECURITY] Fedora 43 Update: python-mistune-3.2.1-1.fc43

The fastest markdown parser in pure Python, inspired by marked...

[SECURITY] Fedora 44 Update: python-mistune-3.2.1-1.fc44

The fastest markdown parser in pure Python, inspired by marked...

CVE-2026-48801

creationtimestamp| type| source ---|---|--- 2026-06-26 22:35:32+00:00| published-proof-of-concept| https://github.com/markdown-it/linkify-it/security/advisories/GHSA-22p9-wv53-3rq4 2026-07-14 23:48:48+00:00| seen| https://bsky.app/profile/cve.skyfleet.blue/post/3mqnfglsj4s2w 2026-07-27...

GHSA-22P9-WV53-3RQ4 LinkifyIt#match scan loop has quadratic algorithmic complexity

Summary LinkifyIt.prototype.match — the package's primary public API — has ON² algorithmic complexity for inputs containing many fuzzy links or emails. This is not a regex backtrack bug; it's a structural issue in the JS-level scan loop that re-slices the input and re-runs unanchored regex search...

LinkifyIt#match scan loop has quadratic algorithmic complexity

Summary LinkifyIt.prototype.match — the package's primary public API — has ON² algorithmic complexity for inputs containing many fuzzy links or emails. This is not a regex backtrack bug; it's a structural issue in the JS-level scan loop that re-slices the input and re-runs unanchored regex search...

EUVD-2026-39775

Mattermost versions 10.11.x = 10.11.18, 11.6.x = 11.6.3, 11.5.x = 11.5.6 fail to properly apply markdown image rendering restrictions to AI bot tool result posts, which allows an authenticated attacker to exfiltrate data to an attacker-controlled server via injecting markdown image syntax into to...

CVE-2026-3472

Mattermost versions 10.11.x = 10.11.18, 11.6.x = 11.6.3, 11.5.x = 11.5.6 fail to properly apply markdown image rendering restrictions to AI bot tool result posts, which allows an authenticated attacker to exfiltrate data to an attacker-controlled server via injecting markdown image syntax into to...

CVE-2026-3472

CVE-2026-3472 affects Mattermost where specific versions (10.11.x <= 10.11.18, 11.6.x <= 11.6.3, 11.5.x

CVE-2026-3472 Markdown image rendering bypass in AI bot tool result posts in Mattermost

Mattermost versions 10.11.x = 10.11.18, 11.6.x = 11.6.3, 11.5.x = 11.5.6 fail to properly apply markdown image rendering restrictions to AI bot tool result posts, which allows an authenticated attacker to exfiltrate data to an attacker-controlled server via injecting markdown image syntax into to...

OPENSUSE-SU-2026:21063-1 Security update for python-Markdown, python-joblib, python-handy-archives, python-apache-libcloud, python-WebOb, python-PyGithub, python-soupsieve

This update for python-Markdown, python-joblib, python-handy-archives, python-apache-libcloud, python-WebOb, python-PyGithub, python-soupsieve fixes the following issues: Changes in python-Markdown: - Fix tests with latest python version bsc1268243 Changes in python-joblib: - Update to 1.5.2:...

SUSE-SU-2026:22370-1 Security update for python-Markdown, python-joblib, python-handy-archives, python-apache-libcloud, python-WebOb, python-PyGithub, python-soupsieve

This update for python-Markdown, python-joblib, python-handy-archives, python-apache-libcloud, python-WebOb, python-PyGithub, python-soupsieve fixes the following issues: Changes in python-Markdown: - Fix tests with latest python version bsc1268243 Changes in python-joblib: - Update to 1.5.2:...

CVE-2026-8661

Server-Side Request Forgery in the markdowntopdf action of Rapid7 InsightConnect Markdown Plugin on Linux in versions prior to 4.0.2 allows remote attackers to make arbitrary outbound HTTP requests via unsanitized resource-loading HTML elements img/src, CSS url, @import embedded in Markdown input...