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Fix SSRF guard to allow private IPs for LAN ntfy servers (W5)

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Remove RFC 1918 blocks from _BLOCKED_NETWORKS — only block loopback
and link-local. Self-hosted ntfy servers are typically on the same LAN.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Kyle 2026-02-25 04:22:48 +08:00
parent 6ad6056125
commit 3268bfc5d5
1 changed files with 3 additions and 5 deletions
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8
backend/app/services/ntfy.py
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@ -17,15 +17,13 @@ logger = logging.getLogger(__name__)
NTFY_TIMEOUT = 8.0 # seconds — hard cap to prevent hung requests
# RFC 1918 + loopback + link-local ranges that must never be contacted
# Loopback + link-local only. Private IPs (RFC 1918) are intentionally allowed
# because UMBRA is self-hosted and the user's ntfy server is typically on the same LAN.
_BLOCKED_NETWORKS = [
ipaddress.ip_network("10.0.0.0/8"),
ipaddress.ip_network("172.16.0.0/12"),
ipaddress.ip_network("192.168.0.0/16"),
ipaddress.ip_network("127.0.0.0/8"),
ipaddress.ip_network("169.254.0.0/16"),
ipaddress.ip_network("::1/128"),
ipaddress.ip_network("fc00::/7"),
ipaddress.ip_network("fe80::/10"),
]