The net/http package improperly accepts a bare LF as a line terminator in chunked data chunk-size lines. This can permit request smuggling if a net/http server is used in conjunction with a server that incorrectly accepts a bare LF as part of a chunk-ext.
https://github.com/sachinlalms/sach-cve-checker
https://github.com/shane-snyder/ocp-cve-fixes
https://www.cisa.gov/news-events/ics-advisories/icsa-26-134-14
https://cert-portal.siemens.com/productcert/html/ssa-783943.html
https://pkg.go.dev/vuln/GO-2025-3563
https://groups.google.com/g/golang-announce/c/Y2uBTVKjBQk
Published: 2025-04-08
Updated: 2026-05-12
Named Vulnerability: GO-2025-3563Named Vulnerability: GHSA-g9pc-8g42-g6vq
Base Score: 9.4
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N
Severity: High
Base Score: 9.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Severity: Critical
EPSS: 0.00842