Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
IBM Langflow OSS — Unauthenticated Remote Code Execution via Auto-Login Bypass and Code Validation
AV AC PR UI S C I A CVSS EPSS %ile KEV
N L N N U H H H 9.8 .1735 96.9 YES
AFFECTED
Product Versions Fixed
Langflow OSS 1.0.0 – —
TIMELINE
May 21 Reserved by ibm
Jul 17 Published (CNA: ibm)
Aug 4 Added to CISA KEV, remediation due 2026-08-07
Aug 8 DUE DATE PASSED — CVE-2026-9198 (IBM Langflow OSS). CISA remediation deadline was August 7, 2026; still in catalog.
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
Lifecycle
Complete event history — 4 events, chronological
| Date | Event | Detail |
|---|
| May 21, 2026 | Reserved | Reserved by ibm |
| July 17, 2026 | Published | Published (CNA: ibm) |
| August 4, 2026 | KEV ADDED | Added to CISA KEV, remediation due 2026-08-07 |
| August 8, 2026 | DUE DATE PASSED | DUE DATE PASSED — CVE-2026-9198 (IBM Langflow OSS). CISA remediation deadline was August 7, 2026; still in catalog. |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| IBM | Langflow OSS | — | 1.0.0 | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-9198 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.