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CVE-2026-9201

Langflow remote code execution

8.8 HIGHEPSS 0.38%
  1. Published5 Aug 2026

Description

IBM Langflow OSS 1.0.0 through 1.10.3 could allow an authenticated attacker to execute arbitrary code due to a cryptographic weakness in the custom component validation mechanism. When the optional hardening mode that restricts execution to trusted component templates is enabled, the application validates component code using a truncated SHA‑256 hash. Because the hash comparison relies on only a portion of the digest, an attacker can craft malicious component code that collides with a trusted template hash and bypasses validation. Successful exploitation allows the attacker to introduce and execute unauthorized Python code within the Langflow process, defeating the intended security control and potentially leading to full compromise of the affected instance.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Langflow≥ 1.0.0 < 1.11.0

Remediation

Fixed in
Langflow≥ 1.11.0

References

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Frequently asked

Is CVE-2026-9201 being actively exploited?

CVE-2026-9201 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.38%.

How severe is CVE-2026-9201?

CVE-2026-9201 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 0.38% probability of exploitation.

Which products are affected by CVE-2026-9201?

Affected products include Langflow.

How do I fix CVE-2026-9201?

Upgrade affected software to a fixed version, for example Langflow 1.11.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-9201 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.