Most recent entries from all https://db.gcve.eu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Mon, 09 Nov 2026 00:23:52 +0000 CVE-2026-123272 — mcp-go before v1.2.1 Origin Validation Error via Unvalidated Well-Known Protected Resource Metadata https://db.gcve.eu/vuln/cve-2026-123272 <p><strong>Affected:</strong> mark3labs mcp-go</p> <p>Mark3labs mcp-go before v1.2.1 contains an improper validation vulnerability in OAuthHandler.fetchServerMetadata that allows malicious MCP servers to obtain tokens for other resources by declaring arbitrary resources in well-known metadata. Attackers can declare a different MCP server as the RFC 8707 resource indicator, causing the authorization server to mint tokens the attacker replays against that resource.</p> <p><strong>Affected:</strong> mark3labs mcp-go</p> <p>Mark3labs mcp-go before v1.2.1 contains an improper validation vulnerability in OAuthHandler.fetchServerMetadata that allows malicious MCP servers to obtain tokens for other resources by declaring arbitrary resources in well-known metadata. Attackers can declare a different MCP server as the RFC 8707 resource indicator, causing the authorization server to mint tokens the attacker replays against that resource.</p> https://db.gcve.eu/vuln/cve-2026-123272