CriticalVulnerability

CVE-2026-85025: IBM Langflow OSS unauthenticated code execution via MCP endpoints

Source: NVD(opens in a new tab)
Identifier: CVE-2026-85025
Published: September 10, 2026
Record updated: October 19, 2026

Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
EPSS: 0.6%

Summary

CVE-2026-85025 affects IBM Langflow OSS versions 1.0.0 through 1.11.5. Improper enforcement of public-flow security restrictions and session isolation controls lets an unauthenticated attacker execute arbitrary code through publicly shared MCP project endpoints. The attacker can also access or modify chat sessions.

Mitigation

The source does not state a fix yet. Check the original advisory for updates.

Details

Scores and exploitation

CVSS score: 9.8(critical)
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector: network
Attack complexity: low
Privileges required: none
User interaction: none
EPSS: 0.6%Estimated probability that this CVE is exploited in the next 30 days, from the FIRST Exploit Prediction Scoring System. Read on November 4, 2026.
Disclosure date: September 10, 2026

Weaknesses and techniques

Weakness (CWE): CWE-863
Attack pattern (CAPEC): CAPEC-122

Classification

Attack type: Other
Attack sophistication: Trivial
AI component targeted: Plugin
Impact: Confidentiality,
Integrity
Labels: security

How this record was produced

Summaries, mitigations and labels on this page are generated automatically from the source. The linked source is authoritative. The source gives this advisory a description and no title, so the title above is a headline generated from the source text.

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-85025

First tracked: September 10, 2026 at 08:08 PM ET, from NVD/CVE Database

Classifier: claude-haiku-5-5, prompt v4

Classifier confidence: 90% (self-assessed)

Summary

Mitigation

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