How severe is CVE-2026-9198?

CVE-2026-9198 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-9198 being actively exploited?

Yes. CVE-2026-9198 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2026-08-04, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2026-9198?

CVE-2026-9198 affects Langflow. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-9198?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

When was CVE-2026-9198 published?

CVE-2026-9198 was published on 2026-07-17 and last updated on 2026-08-17.

CVE-2026-9198

CVE-2026-9198 is a critical-severity vulnerability in Langflow with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2026-08-04). The underlying weakness is classified as CWE-94.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 19% (97th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2026-08-04)
Weakness: CWE-94
Affected product: Langflow
Published: 2026-07-17
Last modified: 2026-08-17

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

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
How severe is CVE-2026-9198?: CVE-2026-9198 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-9198 being actively exploited?: Yes. CVE-2026-9198 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2026-08-04, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2026-9198?: CVE-2026-9198 affects Langflow. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-9198?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
When was CVE-2026-9198 published?: CVE-2026-9198 was published on 2026-07-17 and last updated on 2026-08-17.

References

Affected products (1)

cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*

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