CVE-2026-43898

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Source
https://cve.org/CVERecord?id=CVE-2026-43898
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43898.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-43898
Aliases
Published
2026-05-28T17:50:31.581Z
Modified
2026-07-08T08:13:27.352842417Z
Severity
  • 10.0 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
Summary
SandboxJS: Sandbox escape via Function.caller leakage of internal call op
Details

SandboxJS is a JavaScript sandboxing library. Prior to 0.9.6, sandbox-defined functions expose Function.caller, allowing sandboxed code to recover the internal LispType.Call runtime callback. That callback can then be invoked with attacker-controlled fake context and obj values to extract blocked host statics, recover the real host Function constructor, and execute arbitrary host JavaScript. This vulnerability is fixed in 0.9.6.

Database specific 
{
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "fixed": "0.9.6"
                }
            ]
        }
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43898.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-94"
    ]
}
References

Affected packages

Git / github.com/nyariv/sandboxjs

Affected ranges

Type
GIT
Repo
https://github.com/nyariv/sandboxjs
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
826865251232611ec94078bab5a18ec875dad4a5
Database specific 
{
    "source": "REFERENCES"
}

Affected versions

0.*
0.5.0
0.5.2
0.5.3
0.6.0
0.6.1
0.6.2
0.7.0
0.7.1
0.8.0
0.8.10
0.8.11
0.8.12
0.8.14
0.8.15
0.8.15.1
0.8.16
0.8.17
0.8.18
0.8.19
0.8.2
0.8.20
0.8.21
0.8.22
0.8.23
0.8.23-1
0.8.23.2
0.8.23.3
0.8.24
0.8.24-1
0.8.24-2
0.8.28
0.8.29
0.8.3
0.8.30
0.8.31
0.8.32
0.8.4
0.8.5
0.8.6
0.8.7
0.8.8
0.8.9
v0.*
v0.8.33
v0.8.34
v0.9.3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43898.json"