Vulnerability-Lookup

GHSA-RMXW-JXXX-4CPC

Vulnerability from github – Published: 2026-02-17 21:34 – Updated: 2026-03-06 01:01

Summary

OpenClaw has a Matrix allowlist bypass via displayName and cross-homeserver localpart matching

Details

Summary

OpenClaw Matrix DM allowlist matching could be bypassed in certain configurations.

Matrix support ships as an optional plugin (not bundled with the core install), so this only affects deployments that have installed and enabled the Matrix plugin.

Affected Packages / Versions

Package: openclaw (npm)
Affected: >= 2026.1.14-1, < 2026.2.2
Patched: >= 2026.2.2

Details

In affected versions, DM allowlist decisions could be made by exact-matching channels.matrix.dm.allowFrom entries against multiple sender-derived candidates, including:

The sender display name (attacker-controlled and non-unique)
The sender MXID localpart with the homeserver discarded, so @alice:evil.example and @alice:trusted.example both match alice

If an operator configured channels.matrix.dm.allowFrom with display names or bare localparts (for example, "Alice" or "alice"), a remote Matrix user may be able to impersonate an allowed identity for allowlist purposes and reach the routing/agent pipeline.

Impact

Matrix DM allowlist identity confusion. The practical impact depends on your Matrix channel policies and what capabilities are enabled downstream.

Mitigation

Upgrade to openclaw >= 2026.2.2.
Ensure Matrix allowlists contain only full Matrix user IDs (MXIDs) like @user:server (or *). Do not use display names or bare localparts.

Fix Commit(s)

8f3bfbd1c4fb967a2ddb5b4b9a05784920814bcf

Release Process Note

The patched version is already published to npm; the advisory can be published once you're ready.

Thanks @MegaManSec (https://joshua.hu) of AISLE Research Team for reporting.

Severity ?

6.5 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

6.3 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "openclaw"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2026.1.14-1"
            },
            {
              "fixed": "2026.2.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-28471"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287",
      "CWE-290"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-02-17T21:34:17Z",
    "nvd_published_at": "2026-03-05T22:16:20Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\n\nOpenClaw Matrix DM allowlist matching could be bypassed in certain configurations.\n\nMatrix support ships as an optional plugin (not bundled with the core install), so this only affects deployments that have installed and enabled the Matrix plugin.\n\n### Affected Packages / Versions\n\n- Package: `openclaw` (npm)\n- Affected: `\u003e= 2026.1.14-1, \u003c 2026.2.2`\n- Patched: `\u003e= 2026.2.2`\n\n### Details\n\nIn affected versions, DM allowlist decisions could be made by exact-matching `channels.matrix.dm.allowFrom` entries against multiple sender-derived candidates, including:\n\n- The sender display name (attacker-controlled and non-unique)\n- The sender MXID localpart with the homeserver discarded, so `@alice:evil.example` and `@alice:trusted.example` both match `alice`\n\nIf an operator configured `channels.matrix.dm.allowFrom` with display names or bare localparts (for example, `\"Alice\"` or `\"alice\"`), a remote Matrix user may be able to impersonate an allowed identity for allowlist purposes and reach the routing/agent pipeline.\n\n### Impact\n\nMatrix DM allowlist identity confusion. The practical impact depends on your Matrix channel policies and what capabilities are enabled downstream.\n\n### Mitigation\n\n- Upgrade to `openclaw \u003e= 2026.2.2`.\n- Ensure Matrix allowlists contain only full Matrix user IDs (MXIDs) like `@user:server` (or `*`). Do not use display names or bare localparts.\n\n### Fix Commit(s)\n\n- `8f3bfbd1c4fb967a2ddb5b4b9a05784920814bcf`\n\n### Release Process Note\n\nThe patched version is already published to npm; the advisory can be published once you\u0027re ready.\n\nThanks @MegaManSec (https://joshua.hu) of [AISLE Research Team](https://aisle.com/) for reporting.",
  "id": "GHSA-rmxw-jxxx-4cpc",
  "modified": "2026-03-06T01:01:45Z",
  "published": "2026-02-17T21:34:17Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-rmxw-jxxx-4cpc"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-28471"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/commit/8f3bfbd1c4fb967a2ddb5b4b9a05784920814bcf"
    },
    {
      "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-allowlist-bypass-via-displayname-and-cross-homeserver-localpart-matching-in-matrix"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "OpenClaw has a Matrix allowlist bypass via displayName and cross-homeserver localpart matching"
}

CVE-2026-28471 (GCVE-0-2026-28471)

Vulnerability from cvelistv5 – Published: 2026-03-05 21:59 – Updated: 2026-03-09 18:03

Title

OpenClaw 2026.1.14-1 < 2026.2.2 - Allowlist Bypass via displayName and Cross-Homeserver localpart Matching in Matrix Plugin

Summary

OpenClaw version 2026.1.14-1 prior to 2026.2.2, with the Matrix plugin installed and enabled, contain a vulnerability in which DM allowlist matching could be bypassed by exact-matching against sender display names and localparts without homeserver validation. Remote Matrix users can impersonate allowed identities by using attacker-controlled display names or matching localparts from different homeservers to reach the routing and agent pipeline.

Severity ?

6.3 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CWE

CWE-287 - Improper Authentication

Assigner

VulnCheck

References

URL

Tags

	https://github.com/openclaw/openclaw/security/adv…	vendor-advisory
	https://github.com/openclaw/openclaw/commit/8f3bf…	patch
	https://www.vulncheck.com/advisories/openclaw-all…	third-party-advisory

Impacted products

	Vendor	Product	Version
	OpenClaw	OpenClaw	Affected: 2026.1.14-1 , < 2026.2.2 (custom)

Credits

@MegaManSec (https://joshua.hu) of AISLE Research Team

Show details on NVD website

JSON

To clipboard

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                "role": "CISA Coordinator",
                "timestamp": "2026-03-09T18:03:41.921814Z",
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          ],
          "value": "OpenClaw version 2026.1.14-1 prior to 2026.2.2, with the Matrix plugin installed and enabled, contain a vulnerability in which DM allowlist matching could be bypassed by exact-matching against sender display names and localparts without homeserver validation. Remote Matrix users can impersonate allowed identities by using attacker-controlled display names or matching localparts from different homeservers to reach the routing and agent pipeline."
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      "metrics": [
        {
          "cvssV4_0": {
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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-RMXW-JXXX-4CPC

Summary

Affected Packages / Versions

Details

Impact

Mitigation

Fix Commit(s)

Release Process Note

CVE-2026-28471 (GCVE-0-2026-28471)

Tags

Sightings

Nomenclature