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vm2: util.getCallSites() bypasses GHSA-v27g-jcqj-v8rw host-frame redaction, leaks host call stack

Type: advisorySource: OSV1 source record

### Summary NodeVM exposes the host `util` module to the sandbox through an unfiltered shallow copy (`Object.assign({}, util)`). On Node.js >= 22.9 this hands sandboxed code `util.getCallSites()`, a programmatic stack-introspection API that returns the host process's full call stack — absolute file paths, function names, and line numbers — including vm2 bridge internals and the embedding application's entrypoint. This bypasses the host-frame redaction established in GHSA-v27g-jcqj-v8rw, which only covers the `Error.prepareStackTrace` channel. ### Details - Root cause — `defaultBuiltinLoaderUtil` copies every static member of the host `util` module and wraps the copy in `vm.readonly()` without filtering any member, so newly added Node APIs land in the sandbox automatically: https://github.com/patriksimek/vm2/blob/7a1f5100b96f48d34e0fe104ab37c0acc5944f92/lib/builtin.js#L25-L38 - Second equivalent channel — the deprecated `sys` builtin (an alias of host `util`) goes through the generic builtin loader `vm.readonly(hostRequire(key))`, which also carries `getCallSites`: https://github.com/patriksimek/vm2/blob/7a1f5100b96f48d34e0fe104ab37c0acc5944f92/lib/builtin.js#L230 - Bypassed protection — GHSA-v27g's redaction (`isHostFrameFileName` + `applyCallSiteGetters`) rewrites host-frame metadata getters to `null` only when the *sandbox realm* formats an error stack: https://github.com/patriksimek/vm2/blob/7a1f5100b96f48d34e0fe104ab37c0acc5944f92/lib/setup-sandbox.js#L818-L870 `util.getC

Announced Source revision 1
Original source ↗

GHSA-r273-hxvj-fxhp

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:GHSA-r273-hxvj-fxhp

vm2

Source reference: /affected/0/package/name

Affected versions
Not stated in this record
Fixed versions
3.11.8

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "SEMVER",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "3.11.8"
          }
        ]
      }
    ],
    "package": {
      "name": "vm2",
      "purl": "pkg:npm/vm2",
      "ecosystem": "npm"
    },
    "database_specific": {
      "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-r273-hxvj-fxhp/GHSA-r273-hxvj-fxhp.json",
      "last_known_affected_version_range": "<= 3.11.7"
    }
  }
]
Related CVEs
CVE-2026-92933

Source reference: /aliases

Publisher severity

medium

Source reference: /severity/1/score

Event
#85835 · Revision 1
Added to Heist Feed
Publisher date
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