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CVE-2026-9198 (GCVE-0-2026-9198)

Vulnerability from cvelistv5 – Published: 2026-07-17 17:36 – Updated: 2026-08-17 19:10
VLAI CISA Previdian
Title
Unauthenticated Remote Code Execution via Auto-Login Bypass and Code Validation
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
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: active Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-17 00:00 UTC
CWE
  • CWE-94 - Improper Control of Generation of Code ('Code Injection')
Assigner
References
Impacted products
Vendor Product Version CPE status
IBM Langflow OSS Affected: 1.0.0 , ≤ 1.10.0 (semver)
    cpe:2.3:a:ibm:langflow_oss:1.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:langflow_oss:1.10.0:*:*:*:*:*:*:*
Create a notification for this product.
Credits
The vulnerability was reported to IBM by Harish Kolla (GitHub: Har1sh-k (https://github.com/Har1sh-k)).
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: e2b79e9e-4751-479e-a927-81545fcc8314

Vulnerability ID: CVE-2026-9198

Status: Confirmed

Status Updated: 2026-08-04 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2026-08-04
Asserted: 2026-08-04
Scope
Notes: IBM Langflow Code Injection Vulnerability | Affected: IBM / Langflow | Description: Langflow contains a code injection vulnerability that allows unauthenticated attackers to achieve full remote code execution on default Langflow deployments. | 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 date: 2026-08-07 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://www.ibm.com/support/pages/node/7278927 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-9198
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-94
Feed CISA Known Exploited Vulnerabilities Catalog
Product Langflow
Due Date 2026-08-07
Date Added 2026-08-04
Vendorproject IBM
Vulnerabilityname IBM Langflow Code Injection Vulnerability
Knownransomwarecampaignuse Unknown
References
Created: 2026-08-04 18:00 UTC | Updated: 2026-08-04 18:00 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 29f8096f-284c-410c-80f0-587d602e903c

Vulnerability ID: CVE-2026-9198

Status: Confirmed

Status Updated: 2026-08-04 16:45 UTC

Exploited: Yes

Timestamps
First Seen: 2026-08-04
Asserted: 2026-08-04
Scope
Notes: Unauthenticated Remote Code Execution via Auto-Login Bypass and Code Validation | Affected: IBM / Langflow OSS | CVSS: 9.8 (CRITICAL) | EPSS: 0.01886 | Used in malware: unknown | Not yet in CISA KEV: False
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title Unauthenticated Remote Code Execution via Auto-Login Bypass and Code Validation
Vendor IBM
Product Langflow OSS
Added Date 2026-08-04T16:45:52.078Z
Cvss Score 9.8
Epss Score 0.01886
Cvss Severity CRITICAL
Epss Percentile 0.77474
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev False
References
Created: 2026-08-04 18:00 UTC | Updated: 2026-08-04 18:00 UTC
Show details on NVD website
To clipboard 

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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.