{"data":{"id":"b9a02289-918a-4cee-a9e7-5de18f583c8d","title":"CVE-2026-12940: IBM Langflow OSS 1.0.0 through 1.10.1 are vulnerable to unauthenticated remote code execution via environment variable x","summary":"CVE-2026-12940 affects IBM Langflow OSS versions 1.0.0 through 1.10.1. The flaw is in the MCP (Model Context Protocol) stdio launcher, in src/lfx/src/lfx/base/mcp/util.py, where the DANGEROUS_ENV_VARS blocklist omits SHELLOPTS, BASHOPTS, and PS4. Per the source, this allows unauthenticated remote code execution through environment variable injection and is classified as CWE-78, OS Command Injection. NVD had not yet provided an assessment at publication on 07/30/2026.","solution":"N/A -- no mitigation discussed in source.","labels":["security"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-12940","publishedAt":"2026-07-30T17:16:28.040Z","cveId":"CVE-2026-12940","cweIds":["CWE-78"],"cvssScore":"9.8","cvssSeverity":"critical","severity":"critical","attackType":["other"],"issueType":"vulnerability","affectedPackages":null,"affectedPackageNames":null,"affectedPackageRefs":null,"affectedVendors":[],"affectedVendorsRaw":["IBM Langflow OSS"],"classifierModel":"claude-haiku-5-5","classifierPromptVersion":"v4","summaryPromptVersion":"v2","headline":"IBM Langflow OSS unauthenticated code execution via MCP stdio launcher","headlinePromptVersion":"h1","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","attackVector":"network","attackComplexity":"low","privilegesRequired":"none","userInteraction":"none","exploitMaturity":"unknown","epssScore":0.00943,"epssCheckedAt":"2026-11-04T12:08:35.508Z","kevDateAdded":null,"advisoryAliases":["GHSA-gx45-8jc3-gqqr"],"affectedPackagesSource":null,"affectedPackagesCheckedAt":"2026-11-02T12:08:48.336Z","patchAvailable":null,"disclosureDate":"2026-07-30T17:16:28.040Z","fixReleasedAt":null,"daysToFix":null,"fixCheckedAt":null,"capecIds":["CAPEC-88"],"crossRefCount":0,"attackSophistication":"trivial","impactType":["confidentiality","integrity","availability"],"aiComponentTargeted":"framework","llmSpecific":false,"classifierConfidence":0.95,"researchCategory":null,"atlasIds":null,"fixes":[]}}