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    6 vulnerabilities by langbot-app

    CVE-2026-54449 (GCVE-0-2026-54449)

    Vulnerability from nvd – Published: 2026-08-20 16:10 – Updated: 2026-08-20 16:10
    VLAI
    Title
    LangBot: Authenticated RCE Via MCP Configuration
    Summary
    LangBot is a global IM bot platform designed for LLMs. In version 4.10.7 and earlier, any authenticated user can add or change an STDIO MCP server configuration without an adequate authorization boundary. In src/langbot/pkg/provider/tools/loaders/mcp.py, StdioServerParameters accepts the configured command and arguments and starts a server-side subprocess on the LangBot server. An attacker who can sign up or obtain an account can use the Extensions MCP configuration to execute arbitrary commands with the privileges of the LangBot service, enabling data disclosure, modification, and service disruption. No fixed version is available as of this review.
    CWE
    • CWE-77 - Improper Neutralization of Special Elements used in a Command ('Command Injection')
    References
    Impacted products
    Vendor Product Version
    langbot-app LangBot Affected: <= 4.10.7
    Create a notification for this product.
    Show details on NVD website

    {
      "containers": {
        "cna": {
          "affected": [
            {
              "product": "LangBot",
              "vendor": "langbot-app",
              "versions": [
                {
                  "status": "affected",
                  "version": "\u003c= 4.10.7"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "LangBot is a global IM bot platform designed for LLMs. In version 4.10.7 and earlier, any authenticated user can add or change an STDIO MCP server configuration without an adequate authorization boundary. In src/langbot/pkg/provider/tools/loaders/mcp.py, StdioServerParameters accepts the configured command and arguments and starts a server-side subprocess on the LangBot server. An attacker who can sign up or obtain an account can use the Extensions MCP configuration to execute arbitrary commands with the privileges of the LangBot service, enabling data disclosure, modification, and service disruption. No fixed version is available as of this review."
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "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"
              }
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-77",
                  "description": "CWE-77: Improper Neutralization of Special Elements used in a Command (\u0027Command Injection\u0027)",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-20T16:10:25.169Z",
            "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
            "shortName": "GitHub_M"
          },
          "references": [
            {
              "name": "https://github.com/langbot-app/LangBot/security/advisories/GHSA-3pvh-63gf-j9mw",
              "tags": [
                "x_refsource_CONFIRM"
              ],
              "url": "https://github.com/langbot-app/LangBot/security/advisories/GHSA-3pvh-63gf-j9mw"
            },
            {
              "name": "https://www.ox.security/blog/mcp-supply-chain-advisory-rce-vulnerabilities-across-the-ai-ecosystem",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://www.ox.security/blog/mcp-supply-chain-advisory-rce-vulnerabilities-across-the-ai-ecosystem"
            }
          ],
          "source": {
            "advisory": "GHSA-3pvh-63gf-j9mw",
            "discovery": "UNKNOWN"
          },
          "title": "LangBot: Authenticated RCE Via MCP Configuration"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "assignerShortName": "GitHub_M",
        "cveId": "CVE-2026-54449",
        "datePublished": "2026-08-20T16:10:25.169Z",
        "dateReserved": "2026-06-15T15:30:40.317Z",
        "dateUpdated": "2026-08-20T16:10:25.169Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }

    CVE-2026-28509 (GCVE-0-2026-28509)

    Vulnerability from nvd – Published: 2026-03-06 04:16 – Updated: 2026-03-06 16:07
    VLAI
    Title
    LangBot has a Cross Site Scripting(XSS) Vulnerability
    Summary
    LangBot is a global IM bot platform designed for LLMs. Prior to version 4.8.7, LangBot’s web UI renders user-supplied raw HTML using rehypeRaw, which can lead to a cross-site scripting (XSS) vulnerability. This issue has been patched in version 4.8.7.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-03-06 15:50 UTC
    CWE
    • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
    References
    Impacted products
    Vendor Product Version
    langbot-app LangBot Affected: < 4.8.7
    Create a notification for this product.
    Show details on NVD website

    {
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            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "attackComplexity": "LOW",
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          ],
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              "url": "https://github.com/langbot-app/LangBot/commit/614621ab7b84fe50da3c6137705cde5a99429866"
            }
          ],
          "source": {
            "advisory": "GHSA-w8gq-g4pc-xh3h",
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          },
          "title": "LangBot has a Cross Site Scripting(XSS) Vulnerability"
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      },
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        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }

    CVE-2025-59835 (GCVE-0-2025-59835)

    Vulnerability from nvd – Published: 2025-10-02 18:59 – Updated: 2025-10-02 19:50
    VLAI
    Title
    LangBot has a cross-directory file upload vulnerability, which could lead to system takeover
    Summary
    LangBot is a global IM bot platform designed for LLMs. In versions 4.1.0 up to but not including 4.3.5, authorized attackers can exploit the /api/v1/files/documents interface to perform arbitrary file uploads. Since this interface does not strictly restrict the storage directory of files on the server, it is possible to upload dangerous files to specific system directories. This is fixed in version 4.3.5.
    SSVC
    Exploitation: poc Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2025-10-02 19:50 UTC
    CWE
    • CWE-23 - Relative Path Traversal
    • CWE-434 - Unrestricted Upload of File with Dangerous Type
    Impacted products
    Vendor Product Version
    langbot-app LangBot Affected: >= 4.1.0, < 4.3.5
    Create a notification for this product.
    Show details on NVD website

    {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
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                  "content": {
                    "id": "CVE-2025-59835",
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                        "Exploitation": "poc"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2025-10-02T19:50:28.048098Z",
                    "version": "2.0.3"
                  },
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              }
            ],
            "providerMetadata": {
              "dateUpdated": "2025-10-02T19:50:39.752Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
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            {
              "product": "LangBot",
              "vendor": "langbot-app",
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                {
                  "status": "affected",
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                }
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            }
          ],
          "descriptions": [
            {
              "lang": "en",
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            }
          ],
          "metrics": [
            {
              "cvssV4_0": {
                "attackComplexity": "LOW",
                "attackRequirements": "NONE",
                "attackVector": "NETWORK",
                "baseScore": 8.6,
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                "subAvailabilityImpact": "HIGH",
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          ],
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              ]
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          ],
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    CVE-2026-54449 (GCVE-0-2026-54449)

    Vulnerability from cvelistv5 – Published: 2026-08-20 16:10 – Updated: 2026-08-20 16:10
    VLAI
    Title
    LangBot: Authenticated RCE Via MCP Configuration
    Summary
    LangBot is a global IM bot platform designed for LLMs. In version 4.10.7 and earlier, any authenticated user can add or change an STDIO MCP server configuration without an adequate authorization boundary. In src/langbot/pkg/provider/tools/loaders/mcp.py, StdioServerParameters accepts the configured command and arguments and starts a server-side subprocess on the LangBot server. An attacker who can sign up or obtain an account can use the Extensions MCP configuration to execute arbitrary commands with the privileges of the LangBot service, enabling data disclosure, modification, and service disruption. No fixed version is available as of this review.
    CWE
    • CWE-77 - Improper Neutralization of Special Elements used in a Command ('Command Injection')
    References
    Impacted products
    Vendor Product Version
    langbot-app LangBot Affected: <= 4.10.7
    Create a notification for this product.
    Show details on NVD website

    {
      "containers": {
        "cna": {
          "affected": [
            {
              "product": "LangBot",
              "vendor": "langbot-app",
              "versions": [
                {
                  "status": "affected",
                  "version": "\u003c= 4.10.7"
                }
              ]
            }
          ],
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            }
          ],
          "metrics": [
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          ],
          "source": {
            "advisory": "GHSA-3pvh-63gf-j9mw",
            "discovery": "UNKNOWN"
          },
          "title": "LangBot: Authenticated RCE Via MCP Configuration"
        }
      },
      "cveMetadata": {
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    CVE-2026-28509 (GCVE-0-2026-28509)

    Vulnerability from cvelistv5 – Published: 2026-03-06 04:16 – Updated: 2026-03-06 16:07
    VLAI
    Title
    LangBot has a Cross Site Scripting(XSS) Vulnerability
    Summary
    LangBot is a global IM bot platform designed for LLMs. Prior to version 4.8.7, LangBot’s web UI renders user-supplied raw HTML using rehypeRaw, which can lead to a cross-site scripting (XSS) vulnerability. This issue has been patched in version 4.8.7.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-03-06 15:50 UTC
    CWE
    • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
    References
    Impacted products
    Vendor Product Version
    langbot-app LangBot Affected: < 4.8.7
    Create a notification for this product.
    Show details on NVD website

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    CVE-2025-59835 (GCVE-0-2025-59835)

    Vulnerability from cvelistv5 – Published: 2025-10-02 18:59 – Updated: 2025-10-02 19:50
    VLAI
    Title
    LangBot has a cross-directory file upload vulnerability, which could lead to system takeover
    Summary
    LangBot is a global IM bot platform designed for LLMs. In versions 4.1.0 up to but not including 4.3.5, authorized attackers can exploit the /api/v1/files/documents interface to perform arbitrary file uploads. Since this interface does not strictly restrict the storage directory of files on the server, it is possible to upload dangerous files to specific system directories. This is fixed in version 4.3.5.
    SSVC
    Exploitation: poc Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2025-10-02 19:50 UTC
    CWE
    • CWE-23 - Relative Path Traversal
    • CWE-434 - Unrestricted Upload of File with Dangerous Type
    Impacted products
    Vendor Product Version
    langbot-app LangBot Affected: >= 4.1.0, < 4.3.5
    Create a notification for this product.
    Show details on NVD website

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