Vulnerability-Lookup

GHSA-GX45-8JC3-GQQR

Vulnerability from github – Published: 2026-07-30 18:31 – Updated: 2026-07-30 18:31

Details

IBM Langflow OSS 1.0.0 through 1.10.1 are vulnerable to unauthenticated remote code execution via environment variable injection in the MCP (Model Context Protocol) stdio launcher. The vulnerability exists in src/lfx/src/lfx/base/mcp/util.py where the DANGEROUS_ENV_VARS blocklist fails to include SHELLOPTS , BASHOPTS , and PS4 environment variables.

Severity

9.8 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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  "affected": [],
  "aliases": [
    "CVE-2026-12940"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-78"
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    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-30T17:16:28Z",
    "severity": "CRITICAL"
  },
  "details": "IBM Langflow OSS 1.0.0 through 1.10.1\u00a0 are vulnerable to unauthenticated remote code execution via environment variable injection in the MCP (Model Context Protocol) stdio launcher. The vulnerability exists in src/lfx/src/lfx/base/mcp/util.py where the DANGEROUS_ENV_VARS blocklist fails to include SHELLOPTS , BASHOPTS , and PS4 environment variables.",
  "id": "GHSA-gx45-8jc3-gqqr",
  "modified": "2026-07-30T18:31:40Z",
  "published": "2026-07-30T18:31:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-12940"
    },
    {
      "type": "WEB",
      "url": "https://www.ibm.com/support/pages/node/7279995"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-12940 (GCVE-0-2026-12940)

Vulnerability from cvelistv5 – Published: 2026-07-30 16:41 – Updated: 2026-07-31 03:56

Title

Langflow is affected by remote code execution due to multiple unauthenticated and insufficiently authorized API endpoints

Summary

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Assigner

ibm

References

1 reference

URL	Tags
https://www.ibm.com/support/pages/node/7279995	vendor-advisorypatch

Impacted products

1 product

Vendor	Product	Version
IBM	Langflow OSS	Affected: 1.0.0 , ≤ 1.10.1 (semver) cpe:2.3:a:ibm:langflow_oss:1.0.0:::::::* cpe:2.3:a:ibm:langflow_oss:1.10.1:::::::*

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                "id": "CVE-2026-12940",
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                  },
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                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-30T00:00:00+00:00",
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    "cna": {
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            "cpe:2.3:a:ibm:langflow_oss:1.0.0:*:*:*:*:*:*:*",
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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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

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GHSA-GX45-8JC3-GQQR

CVE-2026-12940 (GCVE-0-2026-12940)

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Nomenclature