CVE-2026-23527

{"id": "CVE-2026-23527", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.9, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 2.2}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}]}, "published": "2026-01-15T20:16:05.620", "references": [{"url": "https://github.com/h3js/h3/commit/618ccf4f37b8b6148bea7f36040471af45bfb097", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/h3js/h3/releases/tag/v1.15.5", "source": "security-advisories@github.com"}, {"url": "https://github.com/h3js/h3/security/advisories/GHSA-mp2g-9vg9-f4cg", "tags": ["Exploit", "Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://simonkoeck.com/writeups/h3-transfer-encoding-request-smuggling", "source": "security-advisories@github.com"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-444"}]}], "descriptions": [{"lang": "en", "value": "H3 is a minimal H(TTP) framework built for high performance and portability. Prior to 1.15.5, there is a critical HTTP Request Smuggling vulnerability. readRawBody is doing a strict case-sensitive check for the Transfer-Encoding header. It explicitly looks for \"chunked\", but per the RFC, this header should be case-insensitive. This vulnerability is fixed in 1.15.5."}, {"lang": "es", "value": "H3 es un framework H(TTP) m\u00ednimo dise\u00f1ado para alto rendimiento y portabilidad. Antes de 1.15.5, existe una vulnerabilidad cr\u00edtica de contrabando de solicitudes HTTP. readRawBody realiza una comprobaci\u00f3n estricta sensible a may\u00fasculas y min\u00fasculas para el encabezado Transfer-Encoding. Busca expl\u00edcitamente 'chunked', pero seg\u00fan la RFC, este encabezado deber\u00eda ser insensible a may\u00fasculas y min\u00fasculas. Esta vulnerabilidad est\u00e1 corregida en 1.15.5."}], "lastModified": "2026-04-13T17:16:27.900", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:h3:h3:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "8AEE0C29-3BA5-4765-82CB-0CE73ACCEB77", "versionEndExcluding": "1.15.5"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}