HIGHCVSS 7.8Vulnerability
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 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.
Properties
- severity
- HIGH
- cvss_severity
- HIGH
- cvss_score
- 7.8
- retrieved_at
- 2026-09-25T15:10:02+00:00
- score
- 7.8
- last_source
- NVD
- cve_id
- CVE-2026-76833
- cvss_vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- signal_observed_at
- 2026-09-25T15:10:02+00:00
- vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- published_at
- 2026-08-20T14:18:00.137
- last_modified
- 2026-09-24T20:06:30.133
Related Entities (2)
HAS_WEAKNESS (1)
→[Weakness]Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')
DESCRIBED_BY (1)
→[Source]NVD
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