{"id":"RLSA-2026:22120","summary":"Important: golang security update","details":"The golang packages provide the Go programming language compiler.\n\nSecurity Fix(es):\n\n* net/mail: golang: net/mail: Denial of Service via pathological email address parsing (CVE-2026-42499)\n\n* cmd/go: golang: Go command (cmd/go): Integrity bypass due to checksum validation flaw via malicious module proxy (CVE-2026-42501)\n\n* html/template: golang: Go html/template: Cross-Site Scripting via improper URL escaping in meta tag content (CVE-2026-39823)\n\n* cmd/go: golang: Go 'go bug' command: Arbitrary file overwrite via symlink attack (CVE-2026-39819)\n\n* net/http/internal/http2: golang: golang.org/x/net: Go HTTP/2: Denial of Service via malformed SETTINGS_MAX_FRAME_SIZE frame (CVE-2026-33814)\n\n* net/mail: golang: Go net/mail: Denial of Service via crafted email inputs (CVE-2026-39820)\n\n* net: golang: Go net package: Denial of Service via long CNAME response in LookupCNAME (CVE-2026-33811)\n\n* net/http/httputil: golang: net/http/httputil: ReverseProxy forwards hidden query parameters, potentially bypassing security controls (CVE-2026-39825)\n\n* cmd/go: golang: Go tool pack: Arbitrary file write via malicious archive extraction (CVE-2026-39817)\n\n* html/template: golang: html/template: Cross-site scripting due to incorrect script tag escaping (CVE-2026-39826)\n\n* net: golang: Go net package: Denial of Service via NUL byte in Dial and LookupPort on Windows (CVE-2026-39836)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","modified":"2026-08-26T00:30:03.326690986Z","published":"2026-08-26T00:08:24.047074Z","upstream":["CVE-2026-33811","CVE-2026-33814","CVE-2026-39817","CVE-2026-39819","CVE-2026-39820","CVE-2026-39823","CVE-2026-39825","CVE-2026-39826","CVE-2026-39836","CVE-2026-42499","CVE-2026-42501"],"database_specific":{"license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/","source_advisory":"RHSA-2026:22120"},"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2026:22120"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2467813"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2467825"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2467811"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2467820"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2467823"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2467815"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2467810"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2467809"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2467822"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2467826"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2467827"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:22120"}],"affected":[{"package":{"name":"golang","ecosystem":"Rocky Linux:10","purl":"pkg:rpm/rocky-linux/golang?distro=rocky-linux-10&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:1.26.3-4.el10_2"}],"database_specific":{"yum_repository":"AppStream"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2026:22120.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}],"credits":[{"name":"Rocky Enterprise Software Foundation"},{"name":"Red Hat"}]}