CVSS 4.0
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се по мрежата, без особени условия, само при определена конфигурация или състояние на системата, без вход и след действие от потребителя.
- Експлоатация: има публичен пример за експлоатация
- Атаката не може да се автоматизира
Описание
Оригинално описание
Origin Validation Error vulnerability in ash-project ash_ai allows a malicious web page to bypass the MCP server's DNS-rebinding protection and issue cross-site requests to a user's local MCP server with that user's actor. In AshAi.Mcp.Server, with the default allowed_origins: nil, origin_allowed?/3 accepts an origin when uri.host == conn.host and the forwarded scheme is https. Both values are attacker-controlled: conn.host comes from the Host header and the scheme is read from the raw x-forwarded-proto header with no trusted-proxy check. Under DNS rebinding the browser sends the attacker's origin and a matching host, and page JavaScript may set X-Forwarded-Proto: https, so the check passes with no TLS or proxy involved. The fix trusts only localhost origins by default; other origins require an explicit allowed_origins allowlist. This issue affects ash_ai: from 0.8.0 before 1.0.0.
Засегнати продукти
- ash-project ash_ai: 0.8.0 преди 1.0.0
- ash-project ash_ai: c94f0b17fbe252f68755ba512678586164ba6139 преди 28af68d73134df0b8fb3aa6ab03e8fd795b07c21
Вид слабост
История
- 31 август 2026 Публикувано
Други уязвимости в ash-project ash_ai
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-81315
- https://nvd.nist.gov/vuln/detail/CVE-2026-81315
- https://github.com/ash-project/ash_ai/security/advisories/GHSA-c92r-f3rr-q49h
- https://cna.erlef.org/cves/CVE-2026-81315.html
- https://osv.dev/vulnerability/EEF-CVE-2026-81315
- https://github.com/ash-project/ash_ai/commit/28af68d73134df0b8fb3aa6ab03e8fd795b07c21