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Prior to 1.83.1, the xDS RBAC HTTP filter in internal/xds/httpfilter/rbac/rbac.go does not lowercase header matcher names in normalizeHeaderMatcher even though incoming metadata keys are lowercase. A DENY policy using a mixed-case name such as X-Role or User-Agent therefore does not match and fails open, allowing requests that should be rejected. The same case mismatch permits :Scheme or Grpc-Status to evade gRFC A41 validation and prevents Host from being rewritten to :authority. This issue is fixed in version 1.83.1.","title":"CVE description"}],"product_status":{"recommended":["openSUSE Tumbleweed:golang-github-v2fly-v2ray-core-0:5.54.2-1.1.aarch64","openSUSE Tumbleweed:golang-github-v2fly-v2ray-core-0:5.54.2-1.1.ppc64le","openSUSE Tumbleweed:golang-github-v2fly-v2ray-core-0:5.54.2-1.1.s390x","openSUSE Tumbleweed:golang-github-v2fly-v2ray-core-0:5.54.2-1.1.x86_64","openSUSE Tumbleweed:v2ray-core-0:5.54.2-1.1.aarch64","openSUSE Tumbleweed:v2ray-core-0:5.54.2-1.1.ppc64le","openSUSE Tumbleweed:v2ray-core-0:5.54.2-1.1.s390x","openSUSE Tumbleweed:v2ray-core-0:5.54.2-1.1.x86_64"]},"references":[{"category":"external","summary":"CVE-2026-84303","url":"https://www.suse.com/security/cve/CVE-2026-84303"},{"category":"external","summary":"SUSE Bug 1278268 for CVE-2026-84303","url":"https://bugzilla.suse.com/1278268"},{"category":"external","summary":"SUSE Bug 1280553 for CVE-2026-84303","url":"https://bugzilla.suse.com/1280553"}],"remediations":[{"category":"vendor_fix","details":"To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n","product_ids":["openSUSE Tumbleweed:golang-github-v2fly-v2ray-core-0:5.54.2-1.1.aarch64","openSUSE Tumbleweed:golang-github-v2fly-v2ray-core-0:5.54.2-1.1.ppc64le","openSUSE Tumbleweed:golang-github-v2fly-v2ray-core-0:5.54.2-1.1.s390x","openSUSE Tumbleweed:golang-github-v2fly-v2ray-core-0:5.54.2-1.1.x86_64","openSUSE Tumbleweed:v2ray-core-0:5.54.2-1.1.aarch64","openSUSE Tumbleweed:v2ray-core-0:5.54.2-1.1.ppc64le","openSUSE Tumbleweed:v2ray-core-0:5.54.2-1.1.s390x","openSUSE Tumbleweed:v2ray-core-0:5.54.2-1.1.x86_64"]}],"scores":[{"cvss_v3":{"baseScore":9.1,"baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"products":["openSUSE Tumbleweed:golang-github-v2fly-v2ray-core-0:5.54.2-1.1.aarch64","openSUSE Tumbleweed:golang-github-v2fly-v2ray-core-0:5.54.2-1.1.ppc64le","openSUSE Tumbleweed:golang-github-v2fly-v2ray-core-0:5.54.2-1.1.s390x","openSUSE Tumbleweed:golang-github-v2fly-v2ray-core-0:5.54.2-1.1.x86_64","openSUSE Tumbleweed:v2ray-core-0:5.54.2-1.1.aarch64","openSUSE Tumbleweed:v2ray-core-0:5.54.2-1.1.ppc64le","openSUSE Tumbleweed:v2ray-core-0:5.54.2-1.1.s390x","openSUSE Tumbleweed:v2ray-core-0:5.54.2-1.1.x86_64"]}],"threats":[{"category":"impact","date":"2026-09-22T00:00:00Z","details":"critical"}],"title":"CVE-2026-84303"}]}