PraisonAI: Origin-validation bypass (startswith prefix match) enables unauthenticated cross-site request forgery against the PraisonAI MCP HTTP server

SummaryThe PraisonAI MCP server exposes an HTTP-stream transport praisonai mcp serve --transport http-stream that binds to localhost and, by default, has no API key. Its only access control for browser-originated requests is an Origin allowlist, which the code implements as required by the MCP...

PYSEC-2026-3886 PraisonAI has a Browser Server WebSocket origin validation bypass via unanchored regex (patch bypass of CVE-2026-40289 / GHSA-8x8f-54wf-vv92)

Summary praisonai/browser/server.py validates incoming WebSocket connections using a Chrome extension Origin check. The regex chrome-extension://a-z0-932 is applied with re.match, which only anchors at the start of the string, not the end. Any Origin header with more than 32 alphanumeric characte...

PYSEC-2026-3892 PraisonAI: Origin-validation bypass (startswith prefix match) enables unauthenticated cross-site request forgery against the PraisonAI MCP HTTP server

Summary The PraisonAI MCP server exposes an HTTP-stream transport praisonai mcp serve --transport http-stream that binds to localhost and, by default, has no API key. Its only access control for browser-originated requests is an Origin allowlist, which the code implements as required by the MCP...

PraisonAI has a Browser Server WebSocket origin validation bypass via unanchored regex (patch bypass of CVE-2026-40289 / GHSA-8x8f-54wf-vv92)

Summarypraisonai/browser/server.py validates incoming WebSocket connections using a Chromeextension Origin check. The regex chrome-extension://a-z0-932 is applied withre.match, which only anchors at the start of the string, not the end. Any Originheader with more than 32 alphanumeric characters...

PraisonAI has an origin validation bypass in MCP HTTP Stream transport that allows browser-mediated unauthenticated tool execution on local MCP server

SummaryPraisonAI's MCP HTTP Stream transport uses an unsafe prefix match when validating the Origin header. The default localhost allowlist includes origins such as http://localhost, and the validation accepts any origin that starts with an allowed value.As a result, an attacker-controlled origin...

PYSEC-2026-3896 PraisonAI has an origin validation bypass in MCP HTTP Stream transport that allows browser-mediated unauthenticated tool execution on local MCP server

Summary PraisonAI's MCP HTTP Stream transport uses an unsafe prefix match when validating the Origin header. The default localhost allowlist includes origins such as http://localhost, and the validation accepts any origin that starts with an allowed value. As a result, an attacker-controlled orig...

USN-8740-1 dotnet8, dotnet10 vulnerabilities

Weeraphat Srisutham discovered that the .NET watch BrowserRefreshServer did not properly validate cross-origin WebSocket connections. An attacker could possibly use this issue to expose sensitive information. CVE-2026-58649 Rajesh Chada discovered that the .NET watch AspireServerService improperl...

USN-8740-1: .NET vulnerabilities

Weeraphat Srisutham discovered that the .NET watch BrowserRefreshServer did not properly validate cross-origin WebSocket connections. An attacker could possibly use this issue to expose sensitive information. CVE-2026-58649 Rajesh Chada discovered that the .NET watch AspireServerService improperl...

SUSE CVE-2026-87434

Missing authorization in CORS in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process to bypass web origin policy via a crafted HTML page. Chromium security severity: Medium...

SUSE CVE-2026-87436

Incomplete cleanup in Browser in Google Chrome prior to 153.0.8010.36 allowed a remote attacker leveraging social engineering to bypass web origin policy via a crafted Chrome extension. Chromium security severity: Medium...

SUSE CVE-2026-87442

Confused deputy in Prerender in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process to potentially bypass web origin policy via a crafted HTML page. Chromium security severity: Medium...

SUSE CVE-2026-87447

Incorrect authorization in Network in Google Chrome prior to 153.0.8010.36 allowed a remote attacker leveraging social engineering to bypass web origin policy via a crafted Chrome extension. Chromium security severity: High...

SUSE CVE-2026-87449

Cross-site request forgery in DeviceBoundSessionCredentials in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to bypass web origin policy via a crafted HTML page. Chromium security severity: Medium...

SUSE CVE-2026-87451

Information leak in Downloads in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process to obtain cross-origin data via a crafted HTML page. Chromium security severity: Medium...

SUSE CVE-2026-87452

Incorrect authorization in GPU in Google Chrome on on Mac prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process to potentially obtain cross-origin data via a crafted HTML page. Chromium security severity: Medium...

SUSE CVE-2026-87461

Information leak in Core in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to leak cross-origin data via a crafted Chrome extension. Chromium security severity: Low...

SUSE CVE-2026-87466

Incorrect authorization in Workers in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to bypass web origin policy via a crafted HTML page. Chromium security severity: Medium...

SUSE CVE-2026-87469

Improper input validation in Extensions in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to bypass web origin policy into a privileged page via crafted network traffic. Chromium security severity: Low...

SUSE CVE-2026-87485

Incorrect authorization in CORS in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process to bypass web origin policy via a crafted HTML page. Chromium security severity: Medium...

SUSE CVE-2026-87495

Information leak in Scroll in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process to leak cross-origin data via a crafted HTML page. Chromium security severity: Medium...