security: bump openfga to v1.18.1, fixes GO-2026-5423#643
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github.com/openfga/openfga@v1.17.1 skips OIDC audience validation when --authn-oidc-audience is unset. We embed the FGA server in-process via server.WithDatastore and never wire its OIDC authn middleware, so the vulnerable path isn't reachable at runtime, but govulncheck flags it via static call-graph reachability and fails CI on every branch.
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Summary
govulncheckhas been failing onmainsince ~2026-06-29 (unrelated to any in-flight feature work):github.com/openfga/openfga@v1.17.1has a published advisory, GO-2026-5423 — OIDC audience validation is skipped when--authn-oidc-audienceis unset.We embed the FGA server in-process via
server.NewServerWithOpts(server.WithDatastore(ds))(internal/authorization/engine/openfga/openfga.go) and never wire its OIDC authn middleware or CLI flags, so the vulnerable code path isn't reachable at runtime.govulncheckstill flags it because the vulnerable symbols are statically reachable through theserverpackage's call graph — a false-positive from an exploitability standpoint, but a real CI gate failure.Change
Bump
github.com/openfga/openfgav1.17.1 → v1.18.1 (latest patch on top of the v1.18.0 fix version).Test plan
go build ./...cleango vet ./...cleanmake lint-go— 0 issuesTEST_DBS=sqlite go test -p 1 ./internal/authorization/... ./internal/service/...— passmake test-sqlite(full integration suite) — passgovulncheck ./...— no vulnerabilities found