CVE-2026-28446: Openclaw OpenClaw Has An Inbound Allowlist Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-4rj2-gpmh-qq5x",
  "modified" : "2026-03-10T22:21:59Z",
  "published" : "2026-02-17T21:36:34Z",
  "aliases" : [ "CVE-2026-28446" ],
  "summary" : "OpenClaw has an inbound allowlist policy bypass in voice-call extension (empty caller ID + suffix matching)",
  "details" : "### Summary\n\nAn authentication bypass in the optional `voice-call` extension/plugin allowed unapproved or anonymous callers to reach the voice-call agent when inbound policy was set to `allowlist` or `pairing`.\n\nDeployments that do not install/enable the `voice-call` extension are not affected.\n\n### Affected Packages / Versions\n\n- `openclaw` (npm): `<= 2026.2.1`\n- Fixed in: `>= 2026.2.2`\n\n### Details\n\nIn affected versions (for example `2026.2.1`), the inbound allowlist check in `extensions/voice-call/src/manager.ts` used suffix-based matching and accepted empty caller IDs after normalization.\n\nThis allowed two bypasses:\n\n1. Missing/empty `from` values normalized to an empty string, which caused the allowlist predicate to evaluate as allowed.\n2. Suffix-based matching meant any caller number whose digits ended with an allowlisted number would be accepted.\n\n### Proof Of Concept\n\n1. Configure the voice-call extension with `inboundPolicy: allowlist` and `allowFrom: [\"+15550001234\"]`.\n2. Place/trigger an inbound call with missing/empty caller ID (provider-dependent; for example anonymous/restricted caller). The call is accepted.\n3. Place a call from a number whose E.164 digits end with `15550001234` (for example `+99915550001234`). The call is accepted.\n\n### Impact\n\nOnly operators who install/enable the optional `voice-call` extension and use `inboundPolicy=allowlist` or `pairing` could have inbound access controls bypassed, potentially allowing unauthorized callers to reach auto-response and tool execution.\n\n### Fix\n\nThe fix hardens inbound policy handling:\n\n- Reject inbound calls when caller ID is missing.\n- Require strict equality when comparing normalized caller IDs against the allowlist (no suffix/prefix matching).\n- Add regression tests for missing caller ID, anonymous caller ID, and suffix-collision cases.\n\nFix commit(s):\n\n- `f8dfd034f5d9235c5485f492a9e4ccc114e97fdb`\n\nThanks @simecek for reporting.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "openclaw"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2026.2.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/openclaw/openclaw/security/advisories/GHSA-4rj2-gpmh-qq5x"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-28446"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/openclaw/openclaw/commit/f8dfd034f5d9235c5485f492a9e4ccc114e97fdb"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/openclaw/openclaw"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/openclaw/openclaw/releases/tag/v2026.2.2"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/openclaw-inbound-allowlist-policy-bypass-in-voice-call-extension-via-empty-caller-id"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-287" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-02-17T21:36:34Z",
    "nvd_published_at" : "2026-03-05T22:16:16Z"
  }
}