CVE-2026-120455: rapidyaml through 0.16.0 Out-of-Bounds Write via ParseEngine::_add_annotation()

rapidyaml through 0.16.0 contains an out-of-bounds write vulnerability in ParseEngine::addannotation() that allows attackers to corrupt memory by supplying YAML with excess anchors or tags. Attackers can submit YAML with consecutive anchors or tags to overflow the fixed two-element annotation array in release builds, corrupting stack memory and crashing the process.