Vulnerability Details CVE-2026-25586
SandboxJS is a JavaScript sandboxing library. Prior to 0.8.29, a sandbox escape is possible by shadowing hasOwnProperty on a sandbox object, which disables prototype whitelist enforcement in the property-access path. This permits direct access to __proto__ and other blocked prototype properties, enabling host Object.prototype pollution and persistent cross-sandbox impact. This vulnerability is fixed in 0.8.29.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 5.7%
CVSS Severity
CVSS v3 Score 10.0
References
Products affected by CVE-2026-25586
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cpe:2.3:a:nyariv:sandboxjs:0.1.0
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cpe:2.3:a:nyariv:sandboxjs:0.1.1
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cpe:2.3:a:nyariv:sandboxjs:0.2.0
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cpe:2.3:a:nyariv:sandboxjs:0.2.1
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cpe:2.3:a:nyariv:sandboxjs:0.2.2
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cpe:2.3:a:nyariv:sandboxjs:0.2.3
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cpe:2.3:a:nyariv:sandboxjs:0.3.0
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cpe:2.3:a:nyariv:sandboxjs:0.3.1
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cpe:2.3:a:nyariv:sandboxjs:0.3.10
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cpe:2.3:a:nyariv:sandboxjs:0.3.11
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cpe:2.3:a:nyariv:sandboxjs:0.3.12
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cpe:2.3:a:nyariv:sandboxjs:0.3.13
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cpe:2.3:a:nyariv:sandboxjs:0.3.14
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cpe:2.3:a:nyariv:sandboxjs:0.3.15
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cpe:2.3:a:nyariv:sandboxjs:0.3.16
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cpe:2.3:a:nyariv:sandboxjs:0.3.17
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cpe:2.3:a:nyariv:sandboxjs:0.3.18
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cpe:2.3:a:nyariv:sandboxjs:0.3.2
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cpe:2.3:a:nyariv:sandboxjs:0.3.3
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cpe:2.3:a:nyariv:sandboxjs:0.3.4
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cpe:2.3:a:nyariv:sandboxjs:0.3.5
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cpe:2.3:a:nyariv:sandboxjs:0.3.6
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cpe:2.3:a:nyariv:sandboxjs:0.3.7
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cpe:2.3:a:nyariv:sandboxjs:0.3.8
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cpe:2.3:a:nyariv:sandboxjs:0.3.9
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cpe:2.3:a:nyariv:sandboxjs:0.4.0
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cpe:2.3:a:nyariv:sandboxjs:0.5.0
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cpe:2.3:a:nyariv:sandboxjs:0.5.2
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cpe:2.3:a:nyariv:sandboxjs:0.5.3
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cpe:2.3:a:nyariv:sandboxjs:0.6.0
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cpe:2.3:a:nyariv:sandboxjs:0.6.1
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cpe:2.3:a:nyariv:sandboxjs:0.6.2
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cpe:2.3:a:nyariv:sandboxjs:0.7.0
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cpe:2.3:a:nyariv:sandboxjs:0.7.1
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cpe:2.3:a:nyariv:sandboxjs:0.8.0
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cpe:2.3:a:nyariv:sandboxjs:0.8.1
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cpe:2.3:a:nyariv:sandboxjs:0.8.10
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cpe:2.3:a:nyariv:sandboxjs:0.8.11
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cpe:2.3:a:nyariv:sandboxjs:0.8.12
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cpe:2.3:a:nyariv:sandboxjs:0.8.14
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cpe:2.3:a:nyariv:sandboxjs:0.8.15
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cpe:2.3:a:nyariv:sandboxjs:0.8.15.1
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cpe:2.3:a:nyariv:sandboxjs:0.8.16
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cpe:2.3:a:nyariv:sandboxjs:0.8.17
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cpe:2.3:a:nyariv:sandboxjs:0.8.18
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cpe:2.3:a:nyariv:sandboxjs:0.8.19
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cpe:2.3:a:nyariv:sandboxjs:0.8.2
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cpe:2.3:a:nyariv:sandboxjs:0.8.20
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cpe:2.3:a:nyariv:sandboxjs:0.8.21
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cpe:2.3:a:nyariv:sandboxjs:0.8.22
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cpe:2.3:a:nyariv:sandboxjs:0.8.23
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cpe:2.3:a:nyariv:sandboxjs:0.8.23-1
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cpe:2.3:a:nyariv:sandboxjs:0.8.23.2
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cpe:2.3:a:nyariv:sandboxjs:0.8.23.3
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cpe:2.3:a:nyariv:sandboxjs:0.8.24
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cpe:2.3:a:nyariv:sandboxjs:0.8.24-1
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cpe:2.3:a:nyariv:sandboxjs:0.8.24-2
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cpe:2.3:a:nyariv:sandboxjs:0.8.25
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cpe:2.3:a:nyariv:sandboxjs:0.8.26
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cpe:2.3:a:nyariv:sandboxjs:0.8.27
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cpe:2.3:a:nyariv:sandboxjs:0.8.28
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cpe:2.3:a:nyariv:sandboxjs:0.8.3
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cpe:2.3:a:nyariv:sandboxjs:0.8.4
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cpe:2.3:a:nyariv:sandboxjs:0.8.5
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cpe:2.3:a:nyariv:sandboxjs:0.8.6
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cpe:2.3:a:nyariv:sandboxjs:0.8.7
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cpe:2.3:a:nyariv:sandboxjs:0.8.8
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cpe:2.3:a:nyariv:sandboxjs:0.8.9