{"type":"post","id":"cve-2026-62863-moling-mcp-server-sse-mode-56514d","slug":"cve-2026-62863-moling-mcp-server-sse-mode-56514d","title":"CVE-2026-62863: MoLing MCP server SSE mode lets any web page hijack sessions and call tools (fixed in 0.5.0)","description":"MoLing fixed CVE-2026-62863 in version 0.5.0, a critical flaw in its SSE transport that could let a malicious website take over a local MCP session.","retrieval_nugget":"MoLing fixed CVE-2026-62863 in version 0.5.0, a critical flaw in its SSE transport that could let a malicious website take over a local MCP session. For teams exposing agent tools over localhost HTTP, the important lesson is that loopback binding alone does not prevent a browser tab from becoming an attacker-controlled client.","published_at":"2026-10-31","updated_at":"2026-10-31","record_date":"2026-10-31","date_kind":"published_at","topics":["mcp"],"entities":["MoLing","MCP","mcp-go","CVE-2026-62863"],"related_patterns":["agent-security-moves-to-runtime-boundaries","agent-protocols-become-interoperability-layer"],"novelty_label":"new_fact","what_changed":"This reports a distinct MoLing vulnerability; none of the archive documents covers the same product or incident.","prior_refs":[],"source_url":"https://github.com/gojue/moling/security/advisories/GHSA-qpgh-hp5g-4vwp","source_urls":["https://github.com/gojue/moling/security/advisories/GHSA-qpgh-hp5g-4vwp"],"schema_version":"newruntime-agent-readable-v0.2","stable_id":"post:cve-2026-62863-moling-mcp-server-sse-mode-56514d","status":"published","visuals":[],"editor":{"role":"editor","name":"Andrey Reshetnikov","profile":"https://newruntime.com/owner-profile.md","profile_json":"https://newruntime.com/owner-profile.json","same_as":["https://www.linkedin.com/in/reshetnikov1/","https://t.me/lapetuse"]},"routes":{"html":"https://newruntime.com/posts/cve-2026-62863-moling-mcp-server-sse-mode-56514d/","markdown":"https://newruntime.com/posts/cve-2026-62863-moling-mcp-server-sse-mode-56514d.md","json":"https://newruntime.com/posts/cve-2026-62863-moling-mcp-server-sse-mode-56514d.json"},"next_reads":[{"type":"topic","path":"/topics/mcp/","url":"https://newruntime.com/topics/mcp/","title":"Mcp","reason":"Explore the mcp topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/mcp.md","json_url":"https://newruntime.com/topics/mcp.json"},{"type":"collection","path":"/posts/","url":"https://newruntime.com/posts/","title":"Field Notes","reason":"Open the latest editorial analysis.","media_type":"text/html","json_url":"https://newruntime.com/posts.json"},{"type":"collection","path":"/source-ledger.json","url":"https://newruntime.com/source-ledger.json","title":"Source Ledger","reason":"Inspect the public source evidence graph.","media_type":"application/json"}]}