CVE-2026-25641
critical · 10SandboxJS is a JavaScript sandboxing library. Prior to 0.8.29, there is a sandbox escape vulnerability due to a mismatch between the key on which the validation is performed and the key used for accessing properties. Even though the key used in property accesses is annotated as string, this is never enforced. So, attackers can pass malicious objects that coerce to different string values when used, e.g., one for the time the key is sanitized using hasOwnProperty(key) and a different one for when the key is used for the actual property access. This vulnerability is fixed in 0.8.29.
10
CVSS
0.5%
EPSS (exploit prob.)
42nd
EPSS percentile
2026-02-06
Published
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Weaknesses
CWE-367
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| nyariv | sandboxjs | < 0.8.29 |
Check a specific version with /api/v1/cve/match.
References
- https://github.com/nyariv/SandboxJS/blob/6103d7147c4666fe48cfda58a4d5f37005b43754/src/executor.ts#L304-L304
- https://github.com/nyariv/SandboxJS/commit/67cb186c41c78c51464f70405504e8ef0a6e43c3
- https://github.com/nyariv/SandboxJS/security/advisories/GHSA-7x3h-rm86-3342
- https://github.com/nyariv/SandboxJS/security/advisories/GHSA-7x3h-rm86-3342
Query this programmatically:
curl https://evil-db.io/api/v1/cve/CVE-2026-25641