EXPOSURES › CVE-2026-12940
CVE-2026-12940
CRITICAL
DETAIL
SourceNVD · cve
Published2026-07-30
CVSS9.8
Referencehttps://nvd.nist.gov/vuln/detail/CVE-2026-12940 ↗
▸ RECOMMENDED ACTION Critical severity — schedule patching of the affected products.
DESCRIPTION
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.
AFFECTED FEDRAMP PRODUCTS · 0
No correlated FedRAMP products.