CVE-2025-12999

UrlUtil.getBaseUrl builds the absolute URLs in a response — download links, icons, asset and API URLs — from the X-Forwarded-Host, X-Forwarded-Proto and X-Forwarded-Prefix request headers, with no check on whether the sender was a trusted proxy, falling back to the client-supplied Host header...

EUVD-2025-210973

UrlUtil.getBaseUrl builds the absolute URLs in a response — download links, icons, asset and API URLs — from the X-Forwarded-Host, X-Forwarded-Proto and X-Forwarded-Prefix request headers, with no check on whether the sender was a trusted proxy, falling back to the client-supplied Host header...

CVE-2025-12999

UrlUtil.getBaseUrl builds the absolute URLs in a response — download links, icons, asset and API URLs — from the X-Forwarded-Host, X-Forwarded-Proto and X-Forwarded-Prefix request headers, with no check on whether the sender was a trusted proxy, falling back to the client-supplied Host header...

CVE-2025-12999

UrlUtil.getBaseUrl builds the absolute URLs in a response — download links, icons, asset and API URLs — from the X-Forwarded-Host, X-Forwarded-Proto and X-Forwarded-Prefix request headers, with no check on whether the sender was a trusted proxy, falling back to the client-supplied Host header...

CVE-2025-12999

Open VSX is vulnerable to cache poisoning via UrlUtil.getBaseUrl , which constructs absolute URLs (download links, signatures, public keys) from X-Forwarded-Host , X-Forwarded-Proto , and X-Forwarded-Prefix headers without verifying the sender is a trusted proxy. A single unauthenticated request ...

CVE-2025-12999

UrlUtil.getBaseUrl builds the absolute URLs in a response — download links, icons, asset and API URLs — from the X-Forwarded-Host, X-Forwarded-Proto and X-Forwarded-Prefix request headers, with no check on whether the sender was a trusted proxy, falling back to the client-supplied Host header...

CVE-2025-12999: Insufficient Verification of Data Authenticity

UrlUtil.getBaseUrl builds the absolute URLs in a response — download links, icons, asset and API URLs — from the X-Forwarded-Host, X-Forwarded-Proto and X-Forwarded-Prefix request headers, with no check on whether the sender was a trusted proxy, falling back to the client-supplied Host header...

EUVD-2026-77328

Publishing limits the compressed size of a VSIX ovsx.publishing.max-content-size, 512 MB by default but nothing limited how large an entry becomes when opened. On the first request to /vscode/unpkg/namespace/extension/version/path, WebResourceService opened the entry with ZipFile.getInputStream a...

CVE-2026-89321

Publishing limits the compressed size of a VSIX ovsx.publishing.max-content-size, 512 MB by default but nothing limited how large an entry becomes when opened. On the first request to /vscode/unpkg/namespace/extension/version/path, WebResourceService opened the entry with ZipFile.getInputStream a...

CVE-2026-89321

Publishing limits the compressed size of a VSIX ovsx.publishing.max-content-size, 512 MB by default but nothing limited how large an entry becomes when opened. On the first request to /vscode/unpkg/namespace/extension/version/path, WebResourceService opened the entry with ZipFile.getInputStream a...

CVE-2026-89321: Improper Handling of Highly Compressed Data (Data Amplification)

Publishing limits the compressed size of a VSIX ovsx.publishing.max-content-size, 512 MB by default but nothing limited how large an entry becomes when opened. On the first request to /vscode/unpkg/namespace/extension/version/path, WebResourceService opened the entry with ZipFile.getInputStream a...

PT-2026-91116

Publishing limits the compressed size of a VSIX ovsx.publishing.max-content-size, 512 MB by default but nothing limited how large an entry becomes when opened. On the first request to /vscode/unpkg/namespace/extension/version/path, WebResourceService opened the entry with ZipFile.getInputStream a...

CVE-2026-13323

In Open VSX Registry before 1.0.2, the /vscode/unpkg/ endpoint serves user-supplied HTML files with Content-Type: text/html and without a Content-Security-Policy or Content-Disposition: attachment response header. An unauthenticated attacker can register a publisher account, upload a VSIX...

CVE-2026-13323

In Open VSX Registry before 1.0.2, the /vscode/unpkg/ endpoint serves user-supplied HTML files with Content-Type: text/html and without a Content-Security-Policy or Content-Disposition: attachment response header. An unauthenticated attacker can register a publisher account, upload a VSIX...

CVE-2026-25046 [Kimi VS Code] Command Injection in publish scripts vsix-publish.js and ovsx-publish.js

Kimi Agent SDK is a set of libraries that expose the Kimi Code Kimi CLI agent runtime in applications. The vsix-publish.js and ovsx-publish.js scripts pass filenames to execSync as shell command strings. Prior to version 0.1.6, filenames containing shell metacharacters like $cmd could execute...

CVE-2026-25046: Improper Neutralization of Special Elements used in a Command

Kimi Agent SDK is a set of libraries that expose the Kimi Code Kimi CLI agent runtime in applications. The vsix-publish.js and ovsx-publish.js scripts pass filenames to execSync as shell command strings. Prior to version 0.1.6, filenames containing shell metacharacters like $cmd could execute...

Visual Studio Code Execution

This module requires Metasploit: https://metasploit.com/download Current source: https://github.com/rapid7/metasploit-framework class MetasploitModule 'Visual Studio vsix Extension Exec', 'Description' = %q Creates a vsix file which can be installed in Visual Studio Code as an extension. At...

Researchers Uncover Publisher Spoofing Bug in Microsoft Visual Studio Installer

Security researchers have warned about an "easily exploitable" flaw in the Microsoft Visual Studio installer that could be abused by a malicious actor to impersonate a legitimate publisher and distribute malicious extensions. "A threat actor could impersonate a popular publisher and issue a...

Microsoft Visual Studio VSIX Auto Update Deserialization of Untrusted Data Privilege Escalation Vulnerability

This vulnerability allows local attackers to escalate privileges on affected installations of Microsoft Visual Studio. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the VSIX Aut...