GHSA-R6H2-5GQQ-V5V6

Vulnerability from github – Published: 2026-02-20 21:05 – Updated: 2026-02-23 22:29
VLAI?
Summary
OpenClaw: Reject symlinks in local skill packaging script
Details

Vulnerability

skills/skill-creator/scripts/package_skill.py (a local helper script used when authors package skills) previously followed symlinks while building .skill archives.

If an author runs this script on a crafted local skill directory containing symlinks to files outside the skill root, the resulting archive can include unintended file contents.

Severity and Exposure

  • Severity: Low
  • Execution context: local/manual workflow only (skill author packaging step)
  • No remote trigger: this is not reachable via normal OpenClaw gateway/chat runtime paths
  • No extraction Zip Slip in this finding: this issue is limited to packaging-time symlink following

Impact

  • Potential unintentional disclosure of local files from the packaging machine into a generated .skill artifact.
  • Requires local execution of the packaging script on attacker-controlled skill contents.

Affected Components

  • skills/skill-creator/scripts/package_skill.py

Affected Packages / Versions

  • Package: openclaw (npm)
  • Latest published version during triage: 2026.2.17
  • Vulnerable version range: <= 2026.2.17
  • Planned patched version (next release): 2026.2.18

Remediation

  • Reject symlinks during skill packaging.
  • Add regression tests for symlink file and symlink directory cases.
  • Update packaging guidance to document the symlink restriction.

Fix Commit(s)

  • c275932aa4230fb7a8212fe1b9d2a18424874b3f
  • ee1d6427b544ccadd73e02b1630ea5c29ba9a9f0

Related PR

  • https://github.com/openclaw/openclaw/pull/20796

Release Process Note

patched_versions is pre-set to the planned next release (2026.2.18). Once npm openclaw@2026.2.18 is published, this advisory is ready to publish without additional edits.

Thanks @aether-ai-agent for reporting.

Severity ?
4.6 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 2026.2.18"
      },
      "package": {
        "ecosystem": "npm",
        "name": "openclaw"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2026.2.19"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-27485"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-61"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-02-20T21:05:45Z",
    "nvd_published_at": "2026-02-21T10:16:12Z",
    "severity": "MODERATE"
  },
  "details": "## Vulnerability\n\n`skills/skill-creator/scripts/package_skill.py` (a local helper script used when authors package skills) previously followed symlinks while building `.skill` archives.\n\nIf an author runs this script on a crafted local skill directory containing symlinks to files outside the skill root, the resulting archive can include unintended file contents.\n\n## Severity and Exposure\n\n- **Severity: Low**\n- **Execution context:** local/manual workflow only (skill author packaging step)\n- **No remote trigger:** this is not reachable via normal OpenClaw gateway/chat runtime paths\n- **No extraction Zip Slip in this finding:** this issue is limited to packaging-time symlink following\n\n## Impact\n\n- Potential unintentional disclosure of local files from the packaging machine into a generated `.skill` artifact.\n- Requires local execution of the packaging script on attacker-controlled skill contents.\n\n## Affected Components\n\n- `skills/skill-creator/scripts/package_skill.py`\n\n## Affected Packages / Versions\n\n- Package: `openclaw` (npm)\n- Latest published version during triage: `2026.2.17`\n- Vulnerable version range: `\u003c= 2026.2.17`\n- Planned patched version (next release): `2026.2.18`\n\n## Remediation\n\n- Reject symlinks during skill packaging.\n- Add regression tests for symlink file and symlink directory cases.\n- Update packaging guidance to document the symlink restriction.\n\n## Fix Commit(s)\n\n- `c275932aa4230fb7a8212fe1b9d2a18424874b3f`\n- `ee1d6427b544ccadd73e02b1630ea5c29ba9a9f0`\n\n## Related PR\n\n- https://github.com/openclaw/openclaw/pull/20796\n\n## Release Process Note\n\n`patched_versions` is pre-set to the planned next release (`2026.2.18`). Once npm `openclaw@2026.2.18` is published, this advisory is ready to publish without additional edits.\n\nThanks @aether-ai-agent for reporting.",
  "id": "GHSA-r6h2-5gqq-v5v6",
  "modified": "2026-02-23T22:29:30Z",
  "published": "2026-02-20T21:05:45Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-r6h2-5gqq-v5v6"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27485"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/pull/20796"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/commit/c275932aa4230fb7a8212fe1b9d2a18424874b3f"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/commit/ee1d6427b544ccadd73e02b1630ea5c29ba9a9f0"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/openclaw/openclaw"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/releases/tag/v2026.2.19"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "OpenClaw: Reject symlinks in local skill packaging script"
}


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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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