Dashboard / CVE-2026-12940

CVE-2026-12940

CRITICAL
INFO Priority: 0.09 BB Relevance: 80/100
Published: 2026-07-30 Modified: 2026-10-23 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: High
I: High
A: High

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.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
langflow langflow 1.0.0 – 1.10.2

References & Advisories (1)

Bug Bounty Relevance

80 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

9.8 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploitation Probability

0.94%
Raw Score 0.009430
Percentile 61.0%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00943
2026-10-28
0.00943

Intelligence Sources

nvd ref →

External Links