CVE-2026-9202

CRITICAL 9.8 ALL-YEARS

Published 2026-07-17 · Last modified 2026-07-18 · ibm · NVD: Analyzed

IBM Langflow OSS 1.0.0 through 1.10.0 allows unauthenticated attackers to create unlimited user accounts on any Langflow instance; when NEW_USER_IS_ACTIVE=true (documented deployment option), newly created accounts are immediately active and can authenticate to reach RCE endpoints, bypassing the need for AUTO_LOGIN.

ELEVATED IMPACT

Severe if exploited (CVSS 9.8), but no confirmed exploitation. Patch on a normal cadence.

Exploitation likelihood

0.5%chance of exploitation in 30 days · 43rd percentile

○ In CISA KEV○ Catalogued PoC◆ SSVC: exploitation none, automatable yes

Impact if exploited

9.8CVSS 3.1 · CRITICAL · CNA

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

What an attacker needs

✓Access: Reachable over the network — no local access needed
✓Privileges: No account or privileges required
✓User interaction: No user interaction needed
✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

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Affected

Vendors Ibm Langflow

Products Langflow Oss Langflow

Weakness (CWE)

CWE-306: Missing Authentication for Critical Function

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References and research data (JSON)

Known Affected Software Configurations

Vendor	Product	Version range
Langflow	Langflow	≥ 1.0.0 and < 1.10.1

All CVSS metrics

CRITICAL 9.8 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CRITICAL 9.8 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Patches & mitigations

https://www.ibm.com/support/pages/node/7278929 vendor-advisorypatchVendor AdvisoryCVE record · ibm · Updated 2026-07-17T17:33:20.083Z
NVD · CVE-2026-9202 · Updated 2026-10-24T20:10:00.137

Advisories

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-45235 ADVISORYEUVD · EUVD-2026-45235

Sources: NVD · CVE.org · All sources and attribution · EPSS