{"schema":"threatline.record/2","record":{"id":"CVE-2026-56848","aliases":[],"summary":"A flaw in Node.js HTTP/2 handling allows `nghttp2_session_mem_send()` to be called re-entrantly while `nghttp2_session_mem_recv()` is executing, resulting in a heap-use-after-free.\r\n\r\nThis vulnerabili","details":"A flaw in Node.js HTTP/2 handling allows `nghttp2_session_mem_send()` to be called re-entrantly while `nghttp2_session_mem_recv()` is executing, resulting in a heap-use-after-free.\r\n\r\nThis vulnerability affects Node.js **26.x**, **24.x**, and **22.x**.","categories":["Runtimes & languages"],"product":"node","vendor":"nodejs","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-56848","source_modified_at":"2026-08-04T17:36:14.044Z","fetched_at":"2026-10-24T00:31:04.721601Z","product":"node","vendor":"nodejs","versions":[{"version":"26.5.0","status":"affected","lessThanOrEqual":"26.5.0","versionType":"semver"},{"version":"24.18.0","status":"affected","lessThanOrEqual":"24.18.0","versionType":"semver"},{"version":"22.23.1","status":"affected","lessThanOrEqual":"22.23.1","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":7.5,"severity":"High","kev":{"listed":false},"epss":{"probability":0.0049,"percentile":0.41246,"score_date":"2026-10-23"},"published_at":"2026-08-04T15:57:24.399Z","modified_at":"2026-08-04T17:36:14.044Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-56848","fetched_at":"2026-10-24T00:31:04.721601Z","source_modified_at":"2026-08-04T17:36:14.044Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-56848","fetched_at":"2026-10-24T00:31:04.721601Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://nodejs.org/en/blog/vulnerability/july-2026-security-releases"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"yes","technical_impact":"partial","assessed_at":"2026-08-04T17:35:44.952267Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"vendor and product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-08-04T17:36:14.044Z","content_hash":"8a829fba315e6643f6f8d66e1d4c4e8406f3315aab14f0bc97febe33c57d56ef"}}