CVE-2026-77360

Description

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.

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Weakness Type (CWE)

CWE-113 CWE-113

References

Other References

https://github.com/middleapi/orpc/commit/daabded122a89d323357c4c401e879701864cb2f https://github.com/middleapi/orpc/issues/1661 https://github.com/middleapi/orpc/pull/1662 https://github.com/middleapi/orpc/releases/tag/v1.14.8 https://github.com/middleapi/orpc/security/advisories/GHSA-j9v4-rhgr-4m5f https://github.com/middleapi/orpc/issues/1661

Frequently Asked Questions

What is CVE-2026-77360? +

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.

How do I check if I'm vulnerable to CVE-2026-77360? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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