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Fencer Vulns
critical 9.8

CVE-2026-9198 kev in the critical feed json

Unauthenticated Remote Code Execution via Auto-Login Bypass and Code Validation

published 2026-07-17 3 mo ago modified 2026-10-24 15 d ago also EUVD-2026-45236

cvss
9.8
version 3.1, CNA
cisa kev
Exploited
added 2026-08-04
epss
28.7%
EPSS 28.7% chance of exploitation in 30 days, percentile 98%
public exploits
2
Metasploit, Exploit-DB, plus a Nuclei check

Summary

IBM Langflow OSS 1.0.0 through 1.10.0 allows unauthenticated attackers to chain /api/v1/auto_login (mints SUPERUSER tokens to any network caller) with /api/v1/validate/code (executes user code via exec()) to achieve full RCE on default Langflow deployments

Patch / fix

cisa required action Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

  • langflow langflow 1.10.1

Timeline

  1. CISA SSVC: exploitation active
  2. First public exploit (Metasploit exploit/multi/http/langflow_unauth_rce_cve_2026_9198)
  3. Published
  4. Added to CISA KEV
  5. CISA patch deadline

Known exploited

Added
3 mo ago
Patch by
2026-08-07 (3 mo ago)
Ransomware
Not known
Required action
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Vendor, product
IBM, Langflow
CISA name
IBM Langflow Code Injection Vulnerability

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
yes
Technical impact
total
Assessed
3 mo ago

Exploit prediction

28.66% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

CVSS scores

assigned by version score vector
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • IBM Langflow OSS

Classification

Weakness
  • CWE-94 Improper Control of Generation of Code

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.