{"affected":[{"defaultStatus":"unaffected","product":"rapidyaml","source":"CNA: VulnCheck","vendor":"biojppm","versions":[{"lessThanOrEqual":"0.16.0","status":"affected","version":"0","versionType":"semver"}]}],"cveId":"CVE-2026-120455","cwes":["CWE-787"],"description":"rapidyaml through 0.16.0 contains an out-of-bounds write vulnerability in ParseEngine::_add_annotation() 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.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":6.9,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","version":"4.0"},{"score":6.1,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H","version":"3.1"}],"modifiedAt":1793629752335,"publishedAt":1793629752335,"references":[{"source":"CNA: VulnCheck","tags":["issue-tracking"],"url":"https://github.com/biojppm/rapidyaml/issues/680"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/biojppm/rapidyaml/blob/v0.16.0/src/c4/yml/parse_engine.def.hpp#L4307-L4351"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/biojppm/rapidyaml/blob/v0.16.0/src/c4/yml/parse_engine.def.hpp#L5524-L5535"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/biojppm/rapidyaml/blob/v0.16.0/src/c4/yml/parse_engine.hpp#L249-L260"},{"source":"CNA: VulnCheck","tags":["release-notes"],"url":"https://github.com/biojppm/rapidyaml/releases/tag/v0.16.0"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://hackmd.io/@haindpwn/rapidyaml-parser-annotation-oob-write"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/rapidyaml-through-0.16.0-out-of-bounds-write-via-parseengine-add-annotation"}],"remediation":[],"revision":"e50a82c48ffc9371b0d34eb6ba57f123576df9599a465b3f5c2177e5664cc748","sources":[{"modifiedAt":1793629752335,"name":"CNA: VulnCheck","retrievedAt":1793632134652,"url":"https://www.cve.org/CVERecord?id=CVE-2026-120455"}],"ssvc":null,"status":"published","title":"rapidyaml through 0.16.0 Out-of-Bounds Write via ParseEngine::_add_annotation()","updatedAt":1793632134652}