CVE-2026-120455

    Dashboard / Vulnerabilities / CVE-2026-120455

    CVE-2026-120455

    Published: 2 Nov 2026Last Modified: 4 Nov 2026

    Summary: rapidyaml through 0.16.0 Out-of-Bounds Write via ParseEngine::_add_annotation()

    Details: 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.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/120xxx/CVE-2026-120455.json, https://github.com/biojppm/rapidyaml/releases/tag/v0.16.0, https://nvd.nist.gov/vuln/detail/CVE-2026-120455, https://www.vulncheck.com/advisories/rapidyaml-through-0.16.0-out-of-bounds-write-via-parseengine-add-annotation, https://github.com/biojppm/rapidyaml/issues/680, https://github.com/biojppm/rapidyaml, https://github.com/biojppm/rapidyaml/blob/v0.16.0/src/c4/yml/parse_engine.def.hpp#L4307-L4351, https://github.com/biojppm/rapidyaml/blob/v0.16.0/src/c4/yml/parse_engine.def.hpp#L5524-L5535, https://github.com/biojppm/rapidyaml/blob/v0.16.0/src/c4/yml/parse_engine.hpp#L249-L260, https://hackmd.io/@haindpwn/rapidyaml-parser-annotation-oob-write

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -f8ac8dd50f4f7916579d55a05ebf9c6488e52670

    Affected versions

    v0.15.2
    v0.15.1
    v0.15.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-120455 | CVE-DB