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ExploitedIn CISA KEVFix available

CVE-2026-9198

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

Exploitation confirmed. First attested on 2026-08-04 by CISA-ADP, CISA KEV, GCVE · kevintel.

  • Published2026-07-17
  • Fixed in1.10.1
  • WeaknessCWE-94

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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

Timeline

dates in UTC
  1. 2026-07-1718:17CVE publishedNVD
  2. 2026-08-04Added to the CISA KEV catalogCISA KEV
  3. 2026-08-04Listed as exploited by GCVEGCVE
  4. 2026-08-04Exploitation first reportedCISA KEV
  5. 2026-08-0417:42SSVC exploitation set to activeCISA-ADP
  6. 2026-09-02Exploit-DB entryExploit-DB

Observed activity

isMalicious corpus · updated 2026-11-04 03:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-9198?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-9198?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Langflow
BranchAffectedFixed in
1.x≥ 1.0.0, < 1.10.11.10.1

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As ibm, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • IBM Langflow OSSother versions: not affected
    Affected
    • ≥ 1.0.0, ≤ 1.10.0no fix statedsemver

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-08-17

Fix

  1. Update Langflow to 1.10.1
  2. CISA’s 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.due 2026-08-07

Advisories and patches

Detection

read 2026-11-03 22:42 UTC
Nuclei template
available
ProjectDiscovery
Exploit-DB
EDB-52675
Exploit-DB
Proof-of-concept repositories
9 repositories, unverified0xdak/CVE-2026-9198_exploitywh-jfellus/CVE-2026-91980xgh057r3c0n/CVE-2026-9198rmhowe425/PoC-CVE-2026-9198Procjevt/CVE-2026-9198
PoC-in-GitHub
Metasploit modules
1 moduleexploit/multi/http/langflow_unauth_rce_cve_2026_9198rank: excellentModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2026-08-04
Patch Due Date
2026-08-07
Ransomware Use
Unknown
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.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2026-07-17
Last Modified
2026-10-24
NVD status
Analyzed
GitHub Advisory
GHSA-5wm9-vgmg-cjv6

Frequently asked questions

What is CVE-2026-9198?

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

Is CVE-2026-9198 actively exploited?

Yes. CVE-2026-9198 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2026-08-07.

What is the CVSS score for CVE-2026-9198?

CVE-2026-9198 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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