{"api_version":"1","generated_at":"2026-08-04T20:52:47+00:00","cve":"CVE-2026-56848","urls":{"html":"https://cve.report/CVE-2026-56848","api":"https://cve.report/api/cve/CVE-2026-56848.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-56848","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-56848"},"summary":{"title":"CVE-2026-56848","description":"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**.","state":"PUBLISHED","assigner":"hackerone","published_at":"2026-08-04 17:16:56","updated_at":"2026-08-04 18:16:53"},"problem_types":["CWE-416","CWE-416 CWE-416 Use After Free"],"metrics":[{"version":"3.0","source":"support@hackerone.com","type":"Secondary","score":"7.5","severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","data":{"version":"3.0","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}},{"version":"3.0","source":"CNA","type":"DECLARED","score":"7.5","severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","data":{"baseScore":7.5,"baseSeverity":"HIGH","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.0"}}],"references":[{"url":"https://nodejs.org/en/blog/vulnerability/july-2026-security-releases","name":"https://nodejs.org/en/blog/vulnerability/july-2026-security-releases","refsource":"support@hackerone.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-56848","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56848","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"nodejs","product":"node","version":"affected 26.5.0 26.5.0 semver","platforms":[]},{"source":"CNA","vendor":"nodejs","product":"node","version":"affected 24.18.0 24.18.0 semver","platforms":[]},{"source":"CNA","vendor":"nodejs","product":"node","version":"affected 22.23.1 22.23.1 semver","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2026-56848","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-08-04T17:35:44.952267Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-08-04T17:36:14.044Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"defaultStatus":"unaffected","product":"node","vendor":"nodejs","versions":[{"lessThanOrEqual":"26.5.0","status":"affected","version":"26.5.0","versionType":"semver"},{"lessThanOrEqual":"24.18.0","status":"affected","version":"24.18.0","versionType":"semver"},{"lessThanOrEqual":"22.23.1","status":"affected","version":"22.23.1","versionType":"semver"}]}],"descriptions":[{"lang":"en","value":"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**."}],"metrics":[{"cvssV3_0":{"baseScore":7.5,"baseSeverity":"HIGH","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-416","description":"CWE-416 Use After Free","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-08-04T15:57:24.399Z","orgId":"36234546-b8fa-4601-9d6f-f4e334aa8ea1","shortName":"hackerone"},"references":[{"url":"https://nodejs.org/en/blog/vulnerability/july-2026-security-releases"}]}},"cveMetadata":{"assignerOrgId":"36234546-b8fa-4601-9d6f-f4e334aa8ea1","assignerShortName":"hackerone","cveId":"CVE-2026-56848","datePublished":"2026-08-04T15:57:24.399Z","dateReserved":"2026-06-23T15:00:03.632Z","dateUpdated":"2026-08-04T17:36:14.044Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-04 17:16:56","lastModifiedDate":"2026-08-04 18:16:53","problem_types":["CWE-416","CWE-416 CWE-416 Use After Free"],"metrics":{"cvssMetricV30":[{"source":"support@hackerone.com","type":"Secondary","cvssData":{"version":"3.0","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-08-04T17:35:44.952267Z","id":"CVE-2026-56848","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"56848","Ordinal":"1","Title":"CVE-2026-56848","CVE":"CVE-2026-56848","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"56848","Ordinal":"1","NoteData":"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**.","Type":"Description","Title":"CVE-2026-56848"}]}}}