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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

View live feed Monitor via API Watch CVE-2026-9198
Severity
CVSS 9.8 · Critical
Confidence
Confirmed
Exploit status
Observed in sensors
EPSS
34.7%
First observed
06 Jul 2026
Last observed
02 Sep 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. Previdian sensors observed exploitation attempts with confirmed confidence. Listed in CISA KEV. Also confirmed by third-party sources.

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 nuclei_scanner

CVE References

Exploitation evidence

Why Previdian 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 Previdian record.

Active exploitation observed

Previdian 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 Previdian Pro API.

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Source Added
CISA First 2026-08-04 16:45 UTC
Previdian 2026-08-04 18:01 UTC
CVE 2026-08-04 18:20 UTC
TheHackerNews 2026-08-05 07:40 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.

567

Attempts observed

304

Unique attacker IPs

47

Attacker countries

AE · AT · AU · BD · BG · BR · CA · CH · CN · CZ · DE · DO · DZ · EC · EE · EG · ES · FI · FR · GB · HK · ID · IN · IQ · IR · IT · JP · KE · KR · MD · MX · MY · NG · NL · PK · PL · RO · RS · RU · SC · SG · TH · TN · TR · TW · US · VN

25

Sensors observed

Exploitation attempts over the last 60 days

Daily events observed by Previdian sensors

Updated 02 Sep 2026

0
1
0
0
0
12
1
3
11
3
0
2
2
21
6
12
12
23
30
13
51
31
27
41
34
36
53
32
35
34
31
43
32
14
17
42
26
31
23
14
11
7
4
29
27
3
7
19
11
8
15
11
7
14
19
19
10
32
14
1
5 Jul 17 Jul 29 Jul 10 Aug 2 Sep

First observed 06 Jul 2026 · Last observed 02 Sep 2026

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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
7
User-Agents
175

Raw values available in Pro and Enterprise.

Virtual patch status

No Previdian 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

34.7%

Weaknesses

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

Recent mention · TheHackerNews

CISA Flags Langflow RCE, Tomcat, and N-central Flaws as Actively Exploited

The U.S. Cybersecurity and Infrastructure Security Agency (CISA), on August 5, 2026, added three flaws to its Known Exploited Vulnerabilities (KEV) catalog, citing evidence of active exploitation in the wild. The list of vulnerabilities is as follows - CVE-2026-9198 (CVSS...

Read full advisory

Potential Proof of Concepts

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

joaovicdev/EXPLOIT-CVE-2026-9198

github · Created 2026-08-29 23:37:33 UTC · 0 stars · AI assessment 90%

K3ysTr0K3R/CVE-2026-9198

github · Created 2026-08-22 15:55:09 UTC · 0 stars · AI assessment 90%

CVE-2026-9198 - IBM Langflow OSS Unauthenticated Remote Code Execution (RCE)

CuteeCat/CVE-2026-9198

github · Created 2026-08-11 00:55:44 UTC · 0 stars · AI assessment 85%

CVE-2026-9198利用代码

rmhowe425/PoC-CVE-2026-9198

github · Created 2026-08-05 17:44:08 UTC · 1 stars · AI assessment 90%

IBM Langflow - Remote Code Execution

nuclei · Created Unknown

Timeline

From disclosure to observed exploitation

  1. KEV confirmed by TheHackerNews

    Exploitation attested by an external source

  2. KEV confirmed by CVE

    Exploitation attested by an external source

  3. Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  4. Public PoC available

    Public proof-of-concept code published

  5. Nuclei template available

    Scanner coverage available

  6. CVE published

    Vulnerability disclosed publicly

  7. Observed by Previdian sensors

    Evidence-backed exploitation signal

  8. Indicators of compromise added (492)

    Indicators of compromise recorded

  9. 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,
  "cvss_estimated": false,
  "epss_score": 0.34734,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": true
  },
  "sensor_telemetry": { "attempts": 567, "sensors": 25 }
}