{"id":"CVE-2026-59896","state":"PUBLISHED","title":"hono/jsx does not isolate context per request, leading to cross-request data disclosure","description":"Hono is a Web application framework that provides support for any JavaScript runtime. From 4.11.8 before 4.12.27, hono/jsx did not isolate context values per request during server-side rendering, allowing createContext, useContext, jsxRenderer, or useRequestContext data from a different in-flight request to be used after an await in an async component. This issue is fixed in version 4.12.27.","publishedAt":"2026-07-08T16:08:07.975Z","updatedAt":"2026-07-08T16:59:09.169Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["honojs hono"],"affected":[{"vendor":"honojs","product":"hono","versions":[{"version":">= 4.11.8, < 4.12.27","status":"affected"}]}],"references":["https://github.com/honojs/hono/security/advisories/GHSA-hvrm-45r6-mjfj","https://github.com/honojs/hono/commit/fab3b13639339cbd5ba1166a5b23d9ac30c5f64f","https://github.com/honojs/hono/releases/tag/v4.12.27"],"weaknesses":["CWE-362"],"ingestedAt":"2026-10-29T20:12:32.778Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/59xxx/CVE-2026-59896.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-59896","state":"PUBLISHED","datePublished":"2026-07-08T16:08:07.975Z","dateUpdated":"2026-07-08T16:59:09.169Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-07-07T16:40:07.984Z"},"containers":{"cna":{"title":"hono/jsx does not isolate context per request, leading to cross-request data disclosure","descriptions":[{"lang":"en","value":"Hono is a Web application framework that provides support for any JavaScript runtime. From 4.11.8 before 4.12.27, hono/jsx did not isolate context values per request during server-side rendering, allowing createContext, useContext, jsxRenderer, or useRequestContext data from a different in-flight request to be used after an await in an async component. This issue is fixed in version 4.12.27."}],"affected":[{"vendor":"honojs","product":"hono","versions":[{"version":">= 4.11.8, < 4.12.27","status":"affected"}]}],"references":[{"url":"https://github.com/honojs/hono/security/advisories/GHSA-hvrm-45r6-mjfj","name":"https://github.com/honojs/hono/security/advisories/GHSA-hvrm-45r6-mjfj","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/honojs/hono/commit/fab3b13639339cbd5ba1166a5b23d9ac30c5f64f","name":"https://github.com/honojs/hono/commit/fab3b13639339cbd5ba1166a5b23d9ac30c5f64f","tags":["x_refsource_MISC"]},{"url":"https://github.com/honojs/hono/releases/tag/v4.12.27","name":"https://github.com/honojs/hono/releases/tag/v4.12.27","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-362","lang":"en","description":"CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-07-08T16:08:07.975Z"},"source":{"advisory":"GHSA-hvrm-45r6-mjfj","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-08T16:49:50.977740Z","id":"CVE-2026-59896","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-08T16:59:09.169Z"}}]}}}