How severe is CVE-2026-3357?

CVE-2026-3357 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-3357 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-3357?

CVE-2026-3357 affects Langflow. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-3357?

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-2026-3357 have an EU (EUVD) identifier?

Yes. CVE-2026-3357 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20023.

When was CVE-2026-3357 published?

CVE-2026-3357 was published on 2026-04-08 and last updated on 2026-06-17.

CVE-2026-3357

CVE-2026-3357 is a high-severity vulnerability in Langflow with a CVSS 3.x base score of 8.8. 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-502.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-20023
Weakness: CWE-502
Affected product: Langflow
Published: 2026-04-08
Last modified: 2026-06-17

Description

IBM Langflow Desktop 1.6.0 through 1.8.2 Langflow could allow an authenticated user to execute arbitrary code on the system, caused by an insecure default setting which permits the deserialization of untrusted data in the FAISS component.

Frequently asked questions

What is CVE-2026-3357?: IBM Langflow Desktop 1.6.0 through 1.8.2 Langflow could allow an authenticated user to execute arbitrary code on the system, caused by an insecure default setting which permits the deserialization of untrusted data in the FAISS component.
How severe is CVE-2026-3357?: CVE-2026-3357 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-3357 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-3357?: CVE-2026-3357 affects Langflow. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-3357?: 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-2026-3357 have an EU (EUVD) identifier?: Yes. CVE-2026-3357 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20023.
When was CVE-2026-3357 published?: CVE-2026-3357 was published on 2026-04-08 and last updated on 2026-06-17.

References

https://www.ibm.com/support/pages/node/7268428

Affected products (1)

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

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