agent-router: MCP session resume does not verify the embedded anti-hijacking subject; default Helm seed makes session IDs forgeable

影響: go:github.com/envoyproxy/ai-gateway >= 0.4.0-rc1, < 1.2.0-rc1 → 1.2.0-rc1

The MCP proxy's client-facing session ID embeds the authenticated caller's subject (JWT sub claim) specifically as an anti-hijacking discriminator — matching the Model Context Protocol specification's documented session-hijacking guidance (https://modelcontextprotocol.io/specification/2025-06-18/basic/security_best_practices#session-hijacking). However, the session-resume path never checks that discriminator against the current caller's identity, so any client that obtains a session ID…

在 GitHub Advisory Database 阅读

2026/10/20 01:53，GitHub Advisory Database 发布了“agent-router: MCP session resume does not verify the embedded anti-hijacking subject; default Helm seed makes session IDs forgeable”（类型：漏洞公告）。严重程度为“中危”（medium）。相关技术：Go、GitHub。