{"id":"CVE-2026-23527","summary":"Request Smuggling (TE.TE) in h3 v1","details":"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.","aliases":["GHSA-mp2g-9vg9-f4cg"],"modified":"2026-04-10T05:40:35.573710Z","published":"2026-01-15T19:24:20.514Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23527.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-444"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23527.json"},{"type":"ADVISORY","url":"https://github.com/h3js/h3/security/advisories/GHSA-mp2g-9vg9-f4cg"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23527"},{"type":"FIX","url":"https://github.com/h3js/h3/commit/618ccf4f37b8b6148bea7f36040471af45bfb097"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/h3js/h3","events":[{"introduced":"0"},{"fixed":"24231b9c448aa852b15b889c53253a783f67a126"}]}],"versions":["v0.0.1","v0.0.10","v0.0.11","v0.0.12","v0.0.13","v0.0.14","v0.0.15","v0.0.2","v0.0.3","v0.0.4","v0.0.5","v0.0.6","v0.0.7","v0.0.8","v0.0.9","v0.2.0","v0.2.1","v0.2.10","v0.2.11","v0.2.12","v0.2.2","v0.2.3","v0.2.4","v0.2.5","v0.2.6","v0.2.7","v0.2.8","v0.2.9","v0.3.0","v0.3.1","v0.3.2","v0.3.3","v0.3.4","v0.3.5","v0.3.6","v0.3.7","v0.3.8","v0.3.9","v0.4.0","v0.4.1","v0.4.2","v0.5.0","v0.5.1","v0.5.2","v0.5.3","v0.5.4","v0.5.5","v0.5.6","v0.5.7","v0.6.0","v0.7.0","v0.7.1","v0.7.10","v0.7.11","v0.7.12","v0.7.13","v0.7.14","v0.7.15","v0.7.16","v0.7.17","v0.7.18","v0.7.19","v0.7.2","v0.7.20","v0.7.21","v0.7.3","v0.7.4","v0.7.5","v0.7.6","v0.7.7","v0.7.8","v0.7.9","v0.8.0","v0.8.1","v0.8.2","v0.8.3","v0.8.4","v0.8.5","v0.8.6","v1.0.0","v1.0.1","v1.0.2","v1.1.0","v1.10.0","v1.10.1","v1.10.2","v1.11.0","v1.11.1","v1.12.0","v1.13.0","v1.13.1","v1.14.0","v1.15.0","v1.15.1","v1.15.2","v1.15.4","v1.2.0","v1.2.1","v1.3.0","v1.4.0","v1.5.0","v1.6.0","v1.6.1","v1.6.2","v1.6.3","v1.6.4","v1.6.5","v1.6.6","v1.7.0","v1.7.1","v1.8.0","v1.8.0-rc.0","v1.8.0-rc.1","v1.8.0-rc.2","v1.8.0-rc.3","v1.8.1","v1.8.2","v1.9.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23527.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L"}]}