BiiTts/CVE-2026-12940-Langflow-Unauth-RCE

PoC

CVE-2026-12940 — Langflow OSS <=1.10.1 unauthenticated RCE via MCP stdio environment-variable injection (SHELLOPTS/PS4). Author PoC + source analysis + lab.

view exploit source poc_in_githubauthor BiiTtspublished 2026-08-03catalog poc_in_github

exploited CVEs (1)

Known CVEs related to this entry.

ID	severity	EPSS	exploitable	published
CVE-2026-12940US	—	0.94% (61st)	Exploit	2026-07-30
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…

scry

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