CVE-2026-100721
- Source
- https://cve.org/CVERecord?id=CVE-2026-100721
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100721.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-100721
- Aliases
- Downstream
CLEANSTART (1)
ECHO (1)
MINI (1)
ROOT (1)
- Published
- 2026-09-27T01:28:28Z
- Modified
- 2026-10-28T02:30:56Z
- Severity
-
- 9.5 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H CVSS Calculator
- Summary
- vm2 before 3.12.2 Authorization Bypass via Custom Resolver
- Details
-
vm2 before 3.12.2 contains an authorization bypass in the NodeVM external-module resolver. When an embedder configures
require.externalwith a custom resolver (andcontext: 'host'),LegacyResolver.customResolvein lib/resolver-compat.js records the resolved module directory inthis.externalsasnew RegExp('^' + escapeRegExp(resolvedPath)), without requiring a path separator or end-of-string boundary. Untrusted guest code can therefore require the allowlisted module (e.g.foo) and then require the absolute path of a non-allowlisted sibling whose path merely shares the resolved prefix (e.g..../node_modules/foo2/index.js); the sibling passesisPathAllowedForModuleand is loaded throughhostRequire, so its top-level code runs in the host process before the exports are wrapped withvm.readonly, resulting in a sandbox escape and arbitrary code execution in the host context. - Database specific
{ "cna_assigner": "VulnCheck", "cwe_ids": [ "CWE-863" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100721.json" }- References
-
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100721.json
- https://github.com/patriksimek/vm2/security/advisories/GHSA-5h3f-q97h-ccvc
- https://nvd.nist.gov/vuln/detail/CVE-2026-100721
- https://www.vulncheck.com/advisories/vm2-before-3.12.2-authorization-bypass-via-custom-resolver
- https://github.com/patriksimek/vm2/commit/6ac3916da84e060c403e407b6b6318fcc66b0e72
- https://github.com/patriksimek/vm2/commit/91034466bfb7f56b95fd48083ec6ca36d058f164
- https://github.com/patriksimek/vm2/commit/ab4ee7d803e8c80155e9eb3672226bddbca4aa9c
Affected packages
Git / github.com/patriksimek/vm2
Affected ranges
- Type
- GIT
- Repo
- https://github.com/patriksimek/vm2
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixedFixedFixedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "0" }, { "fixed": "3.12.2" } ], "source": "AFFECTED_FIELD", "strategy": "StandardRange" }, { "range": [ { "fixed": "6ac3916da84e060c403e407b6b6318fcc66b0e72" } ], "source": "REFERENCES_COMMIT" }, { "range": [ { "fixed": "ab4ee7d803e8c80155e9eb3672226bddbca4aa9c" } ], "source": "REFERENCES_COMMIT" }, { "range": [ { "fixed": "91034466bfb7f56b95fd48083ec6ca36d058f164" } ], "source": "REFERENCES_COMMIT" } ] }