{
    "document": {
        "category": "csaf_base",
        "csaf_version": "2.0",
        "distribution": {
            "tlp": {
                "label": "WHITE"
            }
        },
        "lang": "en",
        "notes": [
            {
                "category": "legal_disclaimer",
                "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this portal to enhance access to its information and vulnerabilities. The use of this information is subject to the following terms and conditions:\n\nThe vulnerabilities disclosed in this portal are gathered by NCSC-NL from a variety of open sources, which the user can retrieve from other platforms. NCSC-NL makes every reasonable effort to ensure that the content of this portal is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or real-time keeping up-to-date. NCSC-NL does not control nor guarantee the accuracy, relevance, timeliness or completeness of information obtained from these external sources. The vulnerabilities disclosed in this portal are intended solely for the convenience of professional parties to take appropriate measures to manage the risks posed to the cybersecurity. No rights can be derived from the information provided therein.\n\nNCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of the vulnerabilities disclosed in this portal. This includes damage resulting from the inaccuracy of incompleteness of the information contained in it.\nThe information on this page is subject to Dutch law. All disputes related to or arising from the use of this portal regarding the disclosure of vulnerabilities will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings."
            }
        ],
        "publisher": {
            "category": "coordinator",
            "contact_details": "cert@ncsc.nl",
            "name": "National Cyber Security Centre",
            "namespace": "https://www.ncsc.nl/"
        },
        "title": "CVE-2026-27646",
        "tracking": {
            "current_release_date": "2026-03-27T16:09:27.550829Z",
            "generator": {
                "date": "2026-02-17T15:00:00Z",
                "engine": {
                    "name": "V.E.L.M.A",
                    "version": "1.7"
                }
            },
            "id": "CVE-2026-27646",
            "initial_release_date": "2026-03-24T20:41:30.766874Z",
            "revision_history": [
                {
                    "date": "2026-03-24T20:41:30.766874Z",
                    "number": "1",
                    "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (3).| CWES updated (1)."
                },
                {
                    "date": "2026-03-24T20:41:34.041913Z",
                    "number": "2",
                    "summary": "NCSC Score created."
                },
                {
                    "date": "2026-03-24T20:41:46.317644Z",
                    "number": "3",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (2).| References created (3).| CWES updated (1)."
                },
                {
                    "date": "2026-03-24T20:41:49.315577Z",
                    "number": "4",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-24T21:46:58.174195Z",
                    "number": "5",
                    "summary": "Source connected.| CVE status created. (valid)| EPSS created."
                },
                {
                    "date": "2026-03-24T22:25:09.481495Z",
                    "number": "6",
                    "summary": "Products connected (1).| Product Identifiers created (1)."
                },
                {
                    "date": "2026-03-24T22:25:17.766458Z",
                    "number": "7",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-25T01:07:55.039749Z",
                    "number": "8",
                    "summary": "Source connected.| CVE status created. (valid)| Products connected (1).| References created (12)."
                },
                {
                    "date": "2026-03-25T01:07:57.553884Z",
                    "number": "9",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-25T15:27:08.882466Z",
                    "number": "10",
                    "summary": "CVSS updated."
                },
                {
                    "date": "2026-03-25T15:27:19.322814Z",
                    "number": "11",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-25T15:39:36.190041Z",
                    "number": "12",
                    "summary": "CVSS updated."
                },
                {
                    "date": "2026-03-25T15:45:55.570685Z",
                    "number": "13",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-25T19:39:03.561091Z",
                    "number": "14",
                    "summary": "Unknown change."
                },
                {
                    "date": "2026-03-27T11:16:59.038389Z",
                    "number": "15",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (1).| References created (3).| CWES updated (1)."
                },
                {
                    "date": "2026-03-27T11:17:09.663493Z",
                    "number": "16",
                    "summary": "NCSC Score updated."
                }
            ],
            "status": "interim",
            "version": "16"
        }
    },
    "product_tree": {
        "branches": [
            {
                "branches": [
                    {
                        "branches": [
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/<2026.3.7",
                                "product": {
                                    "name": "vers:unknown/<2026.3.7",
                                    "product_id": "CSAFPID-5904066"
                                }
                            }
                        ],
                        "category": "product_name",
                        "name": "OpenClaw"
                    }
                ],
                "category": "vendor",
                "name": "Open Source"
            },
            {
                "branches": [
                    {
                        "branches": [
                            {
                                "category": "product_version_range",
                                "name": "vers:semver/2026.3.7",
                                "product": {
                                    "name": "vers:semver/2026.3.7",
                                    "product_id": "CSAFPID-5901516"
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:semver/<2026.3.7",
                                "product": {
                                    "name": "vers:semver/<2026.3.7",
                                    "product_id": "CSAFPID-5901515"
                                }
                            }
                        ],
                        "category": "product_name",
                        "name": "OpenClaw"
                    }
                ],
                "category": "vendor",
                "name": "OpenClaw"
            },
            {
                "branches": [
                    {
                        "branches": [
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/<2026.3.7",
                                "product": {
                                    "name": "vers:unknown/<2026.3.7",
                                    "product_id": "CSAFPID-5902741",
                                    "product_identification_helper": {
                                        "cpe": "cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*"
                                    }
                                }
                            },
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/>=0|<2026.3.7",
                                "product": {
                                    "name": "vers:unknown/>=0|<2026.3.7",
                                    "product_id": "CSAFPID-5902074"
                                }
                            }
                        ],
                        "category": "product_name",
                        "name": "openclaw"
                    }
                ],
                "category": "vendor",
                "name": "openclaw"
            }
        ]
    },
    "vulnerabilities": [
        {
            "cve": "CVE-2026-27646",
            "cwe": {
                "id": "CWE-863",
                "name": "Incorrect Authorization"
            },
            "notes": [
                {
                    "category": "description",
                    "text": "OpenClaw versions prior to 2026.3.7 contain a sandbox escape vulnerability in the /acp spawn command that allows authorized sandboxed sessions to initialize host-side ACP runtime. Attackers can bypass sandbox restrictions by invoking the /acp spawn slash-command to cross from sandboxed chat context into host-side ACP session initialization when ACP is enabled.",
                    "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-27646"
                },
                {
                    "category": "description",
                    "text": "OpenClaw versions prior to 2026.3.7 contain a sandbox escape vulnerability in the /acp spawn command that allows authorized sandboxed sessions to initialize host-side ACP runtime. Attackers can bypass sandbox restrictions by invoking the /acp spawn slash-command to cross from sandboxed chat context into host-side ACP session initialization when ACP is enabled.",
                    "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/27xxx/CVE-2026-27646.json"
                },
                {
                    "category": "description",
                    "text": "### Summary\nSandboxed requester sessions could reach host-side ACP session initialization through `/acp spawn`.\n\nOpenClaw already blocked `sessions_spawn({ runtime: \"acp\" })` from sandboxed sessions, but the slash-command path initialized ACP directly without applying the same host-runtime guard first.\n\n### Affected Packages / Versions\n- npm package: `openclaw`\n- Affected versions: `<= 2026.3.2`\n- Patched version: `>= 2026.3.7`\n\n### Details\nACP sessions run on the host, not inside the OpenClaw sandbox. The direct ACP spawn path in `src/agents/acp-spawn.ts` already denied sandboxed requesters, but `/acp spawn` in `src/auto-reply/reply/commands-acp/lifecycle.ts` called `initializeSession(...)` without first applying the same restriction.\n\nIn affected versions, an already authorized sender in a sandboxed session could use `/acp spawn` to cross from sandboxed chat context into host-side ACP runtime initialization when ACP was enabled and a backend was available.\n\n### Fix Commit(s)\n- `61000b8e4ded919ca1a825d4700db4cb3fdc56e3`\n\n### Fix Details\nThe fix introduced a shared ACP runtime-policy guard in `src/agents/acp-spawn.ts` and reused it from the `/acp spawn` handler in `src/auto-reply/reply/commands-acp/lifecycle.ts` before any ACP backend initialization. Regression coverage was added in `src/auto-reply/reply/commands-acp.test.ts` to prove sandboxed `/acp spawn` requests are rejected early, while existing ACP spawn behavior for non-sandboxed sessions remains unchanged.\n\n### Release Process Note\nPatched version is pre-set to `2026.3.7` so the advisory can be published once that npm release is available.\n\nThanks @tdjackey for reporting.",
                    "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/npm%2FGHSA-9q36-67vc-rrwg.json?alt=media"
                },
                {
                    "category": "other",
                    "text": "0.0001",
                    "title": "EPSS"
                },
                {
                    "category": "other",
                    "text": "CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:N/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",
                    "title": "CVSSV4"
                },
                {
                    "category": "other",
                    "text": "5.8",
                    "title": "CVSSV4 base score"
                },
                {
                    "category": "other",
                    "text": "5.5",
                    "title": "NCSC Score"
                },
                {
                    "category": "other",
                    "text": "There is product data available from source Nvd, There is product data available from source Certbundde",
                    "title": "NCSC Score top increasing factors"
                }
            ],
            "product_status": {
                "known_affected": [
                    "CSAFPID-5901515",
                    "CSAFPID-5902741",
                    "CSAFPID-5904066",
                    "CSAFPID-5902074"
                ],
                "known_not_affected": [
                    "CSAFPID-5901516"
                ]
            },
            "references": [
                {
                    "category": "external",
                    "summary": "Source - nvd",
                    "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-27646"
                },
                {
                    "category": "external",
                    "summary": "Source - cveprojectv5",
                    "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/27xxx/CVE-2026-27646.json"
                },
                {
                    "category": "external",
                    "summary": "Source - first",
                    "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0"
                },
                {
                    "category": "external",
                    "summary": "Source - certbundde",
                    "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0639.json"
                },
                {
                    "category": "external",
                    "summary": "Source - osv",
                    "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/npm%2FGHSA-9q36-67vc-rrwg.json?alt=media"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd; osv",
                    "url": "https://github.com/openclaw/openclaw/commit/61000b8e4ded919ca1a825d4700db4cb3fdc56e3"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde; cveprojectv5; nvd; osv",
                    "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-9q36-67vc-rrwg"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd",
                    "url": "https://vulncheck.com/advisories/openclaw-mar-sandbox-escape-via-acp-spawn-command"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0639.json"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0639"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-6mgf-v5j7-45cr"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-hfpr-jhpq-x4rm"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-r6qf-8968-wj9q"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-rchv-x836-w7xp"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-6rmx-gvvg-vh6j"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-pjvx-rx66-r3fg"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-j425-whc4-4jgc"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-3h2q-j2v4-6w5r"
                },
                {
                    "category": "external",
                    "summary": "Reference - certbundde",
                    "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-9q2p-vc84-2rwm"
                },
                {
                    "category": "external",
                    "summary": "Reference - osv",
                    "url": "https://github.com/openclaw/openclaw/releases/tag/v2026.3.7"
                }
            ],
            "scores": [
                {
                    "cvss_v3": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N",
                        "baseScore": 6.1,
                        "baseSeverity": "MEDIUM"
                    },
                    "products": [
                        "CSAFPID-5901515",
                        "CSAFPID-5902074",
                        "CSAFPID-5902741",
                        "CSAFPID-5904066"
                    ]
                }
            ],
            "title": "CVE-2026-27646"
        }
    ]
}