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CVE-2026-25881

SandboxJS is a JavaScript sandboxing library. Prior to 0.8.31, a sandbox escape vulnerability allows sandboxed code to mutate host built-in prototypes by laundering the isGlobal protection flag through array literal intermediaries. When a global prototype reference (e.g., Map.prototype, Set.prototype) is placed into an array and retrieved, the isGlobal taint is stripped, permitting direct prototype mutation from within the sandbox. This results in persistent host-side prototype pollution and may
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:13b8f7aae61bb76e263bc97066d04400b57357932af1d9d2964c9d0c58ca755c
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"SandboxJS","vendor":"nyariv","versions":[{"status":"affected","version":"< 0.8.31"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:820f837abe940aadcf84f405a21aa1ef611b634ed0f78a45065109f96bb38828 · sha256:37662b1473a9ea91… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.1,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:820f837abe940aadcf84f405a21aa1ef611b634ed0f78a45065109f96bb38828 · sha256:37662b1473a9ea91… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-1321","description":"CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:820f837abe940aadcf84f405a21aa1ef611b634ed0f78a45065109f96bb38828 · sha256:37662b1473a9ea91… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/nyariv/SandboxJS/commit/f369f8db26649f212a6a9a2e7a1624cb2f705b53","tags":["x_refsource_MISC"],"url":"https://github.com/nyariv/SandboxJS/commit/f369f8db26649f212a6a9a2e7a1624cb2f705b53"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:820f837abe940aadcf84f405a21aa1ef611b634ed0f78a45065109f96bb38828 · sha256:37662b1473a9ea91… · /containers/cna/references/1
{"name":"https://github.com/nyariv/SandboxJS/security/advisories/GHSA-ww7g-4gwx-m7wj","tags":["x_refsource_CONFIRM"],"url":"https://github.com/nyariv/SandboxJS/security/advisories/GHSA-ww7g-4gwx-m7wj"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:820f837abe940aadcf84f405a21aa1ef611b634ed0f78a45065109f96bb38828 · sha256:37662b1473a9ea91… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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