HIGH 8.4 NVD
CVE-2026-76833
@cgauge/yaml npm package contains an arbitrary code execution vulnerability that allows attackers to execute arbitrary JavaScript by embedding a custom !js YAML
@cgauge/yaml npm package contains an arbitrary code execution vulnerability that allows attackers to execute arbitrary JavaScript by embedding a custom !js YAML tag whose construct callback unconditionally calls eval() on attacker-supplied string values during document parsing. Any application parsing untrusted YAML input with this library exposes full Node.js runtime authority, including environment variable access, filesystem read/write, network access, and subprocess execution, with no safe-mode alternative or opt-out mechanism available.
References
- https://gist.github.com/arjunjaincs/35da3a80b4b16f324f194acec18489ba
- https://github.com/cgauge/packages
- https://www.vulncheck.com/advisories/cgauge-yaml-npm-package-arbitrary-code-execution-via-
- https://gist.github.com/arjunjaincs/35da3a80b4b16f324f194acec18489ba
This high severity vulnerability with a CVSS score of 8.4 was published on 2026-08-20 via NVD.
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