KEVIntel

Vulnerability report

Active exploitation observed Confirmed confidence In CISA KEV

CVE-2026-9198

Langflow OSS Unauthenticated Remote Code Execution

IBM / Langflow OSS · 1.0.0 to <= 1.10.0

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Severity
CVSS 9.8 · Critical
Confidence
Confirmed
Exploit status
Observed in sensors
EPSS
1.9%
First observed
06 Jul 2026
Last observed
04 Aug 2026

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2026-9198 is an unauthenticated vulnerability affecting IBM Langflow OSS. 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...

Is it exploited?

Yes. KEVIntel sensors observed exploitation attempts with confirmed confidence.

Who is affected?

IBM / Langflow OSS 1.0.0 to <= 1.10.0.

What should we do?

Patch immediately, validate internet-facing exposure, and monitor for matching requests.

Overview

Langflow OSS Unauthenticated Remote Code Execution

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

Vendor Product Affected Status
IBM Langflow OSS Through 1.10.0 Affected
View vendor advisory (opens in new tab)
Published
17 Jul 2026
Exploited Since
06 Jul 2026
Attack vector
Remote
Complexity
Low
Privileges
None
User interaction
None

Tags

cisa

CVE References

Exploitation evidence

Why KEVIntel marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

CISA

Recorded 04 Aug 2026

Independent exploitation attestation added to the KEVIntel record.

Active exploitation observed

KEVIntel sensor

First observed 06 Jul 2026

First-party sensor telemetry confirms matching exploitation attempts.

Proof of concept available

GitHub

Recorded 21 Jul 2026

Public scanner or PoC coverage increases practical exploitability.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.

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Source Added
CISA First 2026-08-04 16:45 UTC
KEVIntel 2026-08-04 18:01 UTC
CVE 2026-08-04 18:20 UTC

Operational indicators for this CVE are listed under Detection.

Sensor telemetry

First-party evidence of exploitation activity

Aggregate observations show the scale, recency, and distribution of activity without overstating sparse data.

555

Attempts observed

212

Unique attacker IPs

39

Attacker countries

AE · AT · AU · BG · CA · CH · CN · CZ · DE · DZ · FI · FR · GB · HK · ID · IE · IN · IR · IT · JP · KE · KH · LT · MY · NG · NL · PK · PL · PT · RO · RU · SC · SE · SG · TH · TR · TW · US · VN

6

Sensors observed

Exploitation attempts over the last 31 days

Daily events observed by KEVIntel sensors

Updated 04 Aug 2026

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First observed 06 Jul 2026 · Last observed 04 Aug 2026

Pro adds sensor region and window summaries. Enterprise adds raw IPs, paths, User-Agents, and payloads.

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Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
3
User-Agents
106

Raw values available in Pro and Enterprise.

Virtual patch status

No KEVIntel virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

Attacker IP Indicators

Attacker IP indicators observed · available in Pro and Enterprise.

Sensor-derived attacker IP indicators are available to Pro and Enterprise accounts under Detection and through the Pro API.

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Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner Reference Detected
Nuclei https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-9198.yaml 29 Jul 2026

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

1.9%

Weaknesses

Improper Control of Generation of Code ('Code Injection') CWE-94

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

samael0x4/CVE-2026-9198

github · Created 2026-07-28 07:50:48 UTC · 1 stars

IBM Langflow OSS 1.0.0 through 1.10.0 contains a remote code execution [RCE]

0xgh057r3c0n/CVE-2026-9198

github · Created 2026-07-24 20:50:04 UTC · 1 stars

IBM Langflow Unauthenticated RCE via Auto-Login Bypass

ywh-jfellus/CVE-2026-9198

github · Created 2026-07-24 09:29:30 UTC · 0 stars

Proof of Concept for CVE-2026-9198 - IBM Langflow Unauthenticated RCE via Auto-Login Bypass

0xdak/CVE-2026-9198_exploit

github · Created 2026-07-21 11:14:59 UTC · 0 stars

IBM Langflow - Remote Code Execution

nuclei · Created Unknown

Timeline

From disclosure to observed exploitation

  1. KEV confirmed by CVE

    Exploitation attested by an external source

  2. Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  3. Nuclei template available

    Scanner coverage available

  4. Public PoC available

    Public proof-of-concept code published

  5. CVE published

    Vulnerability disclosed publicly

  6. Observed by KEVIntel sensors

    Evidence-backed exploitation signal

  7. Indicators of compromise added (212)

    Indicators of compromise recorded

  8. CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2026-9198

Free JSON includes basic KEV fields 
{
  "cve_id": "CVE-2026-9198",
  "confidence": "Confirmed",
  "cvss_score": 9.8,
  "epss_score": 0.01886,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": true
  },
  "sensor_telemetry": { "attempts": 555, "sensors": 6 }
}

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