CVE-2026-77360

CVE-2026-77360 · oRPC: Vary Header Injection in CORS Plugin leading to potential Cache/CORS Bypass

This page contains facts from public vulnerability sources. Check the original advisory before updating.

oRPC is an tool that helps build APIs that are end-to-end type-safe and adhere to OpenAPI standards. Prior to 1.14.8, the @orpc/server CORS plugin in packages/server/src/plugins/cors.ts copies a client's incoming Vary request header into the response instead of controlling Vary as a response-only header and using Origin for request-origin variation. In deployments behind a shared cache, CDN, or reverse proxy that keys responses using Vary, a client can inject arbitrary variation values, pollute cache keys, and cause inconsistent CORS enforcement for other clients. Default non-cached configurations have no established direct confidentiality, integrity, or availability impact. This issue is fixed in version 1.14.8.

CVSS 6.3 · Medium · EPSS 0.5% · Fix available

Published

2026-09-16T18:42:45.816Z

Updated

2026-09-16T19:40:51.991Z

Stack: node

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