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CVE-2026-76833

@cgauge/yaml npm Package Arbitrary Code Execution via eval() YAML Tag PUBLISHED

Description (CNA)

@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.

Affected (CNA)

Vendor / productVersions
cgauge / @cgauge/yamlaffected 0 through 0.27.0

CWE

CWE-95

References

ADP enrichment

CISA-ADP

No English description supplied.