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Title: fix(security): prefer IPv4 when pinning DB and 1Password connections by waleedlatif1 · Pull Request #5799 · simstudioai/sim · GitHub

Open Graph Title: fix(security): prefer IPv4 when pinning DB and 1Password connections by waleedlatif1 · Pull Request #5799 · simstudioai/sim

X Title: fix(security): prefer IPv4 when pinning DB and 1Password connections by waleedlatif1 · Pull Request #5799 · simstudioai/sim

Description: Summary Same class of bug fixed for MCP in #5798, applied to the other two pinned-resolution sites (flagged by both review passes on that PR). SSRF pinning forces each outbound connection to a single resolved IP, which strips Happy Eyeballs' IPv4 fallback. dns.lookup(verbatim) returns the IPv6 address first for dual-stack hosts, so a dual-stack database host or 1Password Connect server gets pinned to IPv6 — unreachable on IPv4-only egress (AWS NAT gateways) and hangs until timeout. validateDatabaseHost and validateConnectServerUrl now resolve all addresses ({ all: true, verbatim: true }) and prefer IPv4; IPv6-only hosts still pin their sole address. Safety SSRF unchanged: the selected (IPv4-preferred) address is the exact one that gets validated (isPrivateOrReservedIP / assertConnectIpAllowed) and pinned — never a "validate A, connect B" split. Equal-or-stricter than before (a private IPv4 is now caught where it was previously masked by an IPv6 pick). No signature/threading changes. Type of Change Bug fix Testing lib/core/security + all DB tool utils (postgresql/clickhouse/mysql) + onepassword suites green (617); tsc + biome clean. Added tests: dual-stack host prefers IPv4; IPv6-only host pins its sole address (onepassword). validateDatabaseHost uses the identical expression, covered by the domain-check test in #5798. Checklist Code follows project style guidelines Self-reviewed my changes Tests added/updated and passing No new warnings introduced I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

Open Graph Description: Summary Same class of bug fixed for MCP in #5798, applied to the other two pinned-resolution sites (flagged by both review passes on that PR). SSRF pinning forces each outbound connection to a sin...

X Description: Summary Same class of bug fixed for MCP in #5798, applied to the other two pinned-resolution sites (flagged by both review passes on that PR). SSRF pinning forces each outbound connection to a sin...

Opengraph URL: https://github.com/simstudioai/sim/pull/5799

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c0c41c0 fix(security): prefer IPv4 when pinning DB and 1Password connections waleedlatif1 Jul 21, 2026 https://github.com/simstudioai/sim/pull/5799/commits/c0c41c0186f93450ec4858cd7c5ade821cd321b7
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