How severe is CVE-2026-0771?

CVE-2026-0771 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-0771 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-0771?

CVE-2026-0771 affects Langflow. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-0771?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-0771 have an EU (EUVD) identifier?

Yes. CVE-2026-0771 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4460.

When was CVE-2026-0771 published?

CVE-2026-0771 was published on 2026-01-23 and last updated on 2026-06-17.

CVE-2026-0771

CVE-2026-0771 is a high-severity vulnerability in Langflow with a CVSS 3.x base score of 7.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-94.

Key facts

Severity: High (CVSS 3.x base score 7.1)
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-4460
Weakness: CWE-94
Affected product: Langflow
Published: 2026-01-23
Last modified: 2026-06-17

Description

Langflow PythonFunction Code Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Langflow. Attack vectors and exploitability will vary depending on the configuration of the product. The specific flaw exists within the handling of Python function components. Depending upon product configuration, an attacker may be able to introduce custom Python code into a workflow. An attacker can leverage this vulnerability to execute code in the context of the application. Was ZDI-CAN-27497.

Frequently asked questions

What is CVE-2026-0771?: Langflow PythonFunction Code Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Langflow. Attack vectors and exploitability will vary depending on the configuration of the product. The specific flaw exists within the handling of Python function components. Depending upon product configuration, an attacker may be able to introduce custom Python code into a workflow. An attacker can leverage this vulnerability to execute code in the context of the application. Was ZDI-CAN-27497.
How severe is CVE-2026-0771?: CVE-2026-0771 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-0771 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-0771?: CVE-2026-0771 affects Langflow. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-0771?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-0771 have an EU (EUVD) identifier?: Yes. CVE-2026-0771 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4460.
When was CVE-2026-0771 published?: CVE-2026-0771 was published on 2026-01-23 and last updated on 2026-06-17.

References

https://www.zerodayinitiative.com/advisories/ZDI-26-037/

Affected products (1)

cpe:2.3:a:langflow:langflow:1.4.2:-:*:*:*:*:*:*

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