{"id":"CVE-2026-77360","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-77360","generatedAt":"2026-10-28T01:44:57.530Z","title":"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.","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.","published":"2026-09-16T19:17:38.000Z","lastModified":"2026-09-30T17:51:56.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"4.0","score":6.3,"severity":"MEDIUM","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-113"],"affected":[],"epss":{"score":0.00543,"percentile":0.4534,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.54%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/middleapi/orpc/commit/daabded122a89d323357c4c401e879701864cb2f","source":"security-advisories@github.com"},{"url":"https://github.com/middleapi/orpc/issues/1661","source":"security-advisories@github.com"},{"url":"https://github.com/middleapi/orpc/pull/1662","source":"security-advisories@github.com"},{"url":"https://github.com/middleapi/orpc/releases/tag/v1.14.8","source":"security-advisories@github.com"},{"url":"https://github.com/middleapi/orpc/security/advisories/GHSA-j9v4-rhgr-4m5f","source":"security-advisories@github.com"},{"url":"https://github.com/middleapi/orpc/issues/1661","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-77360","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}