This vulnerability is being actively exploited in the wild, according to the CISA Known Exploited Vulnerabilities catalog. CISA added it on August 4, 2026.

CriticalVulnerability

CVE-2026-9198: IBM Langflow OSS unauthenticated code execution via auto_login and validate/code

Source: NVD(opens in a new tab)
Identifier: CVE-2026-9198
Published: July 17, 2026
Record updated: November 2, 2026

View JSON

Known exploitation: Listed in the CISA Known Exploited Vulnerabilities catalog since August 4, 2026.
EPSS: 28.7%

Summary

CVE-2026-9198 affects IBM Langflow OSS versions 1.0.0 through 1.10.0. An unauthenticated attacker can chain /api/v1/auto_login, which mints SUPERUSER tokens to any network caller, with /api/v1/validate/code, which executes user code via exec(), to achieve full RCE on default Langflow deployments. The weakness is classified as CWE-94, Improper Control of Generation of Code ('Code Injection').

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: 28.7%Estimated probability that this CVE is exploited in the next 30 days, from the FIRST Exploit Prediction Scoring System. Read on November 12, 2026.
Known exploitation: Listed in CISA KEV, exploited in the wild
Disclosure date: July 17, 2026

Weaknesses and techniques

Weakness (CWE): CWE-94
Attack pattern (CAPEC): CAPEC-242

Classification

Attack type: Other
Attack sophistication: Trivial
AI component targeted: Framework
Impact: Confidentiality,
Integrity,
Availability
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-2026-9198

First tracked: July 17, 2026 at 08:07 PM ET, from NVD/CVE Database

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

Classifier confidence: 95% (self-assessed)

Coverage

News, research and other items that mention CVE-2026-9198.

Critical Langflow Flaws Could Let Unauthenticated Attackers Run Code on ServersThe Hacker News · 2026-11-02
Langflow's Critical Authenticated RCE Flaw Targeted in 1,423 Honeypot Exploit AttemptsThe Hacker News · 2026-10-15

Summary

Mitigation

Coverage

Related items