Vulnerability Description
@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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://gist.github.com/arjunjaincs/35da3a80b4b16f324f194acec18489ba
- https://github.com/cgauge/packages
- https://www.vulncheck.com/advisories/cgauge-yaml-npm-package-arbitrary-code-exec
- https://gist.github.com/arjunjaincs/35da3a80b4b16f324f194acec18489ba
FAQ
What is CVE-2026-76833?
CVE-2026-76833 is a vulnerability with a CVSS score of 7.8 (HIGH). @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 unconditio...
How severe is CVE-2026-76833?
CVE-2026-76833 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-76833?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.