CVE-2026-3357Network attack vector

Authenticated code execution via unsafe Pickle deserialization

Published Apr 8, 2026 · Updated Apr 8, 2026

Unsafe deserialization in Langflow Desktop 1.6.0 through 1.8.2 allows remote authenticated users to execute arbitrary code. The FAISS Vector Store loads an uploaded Python Pickle file with dangerous deserialization enabled by default and without restricting untrusted objects. Exploitation requires an authenticated user to upload the crafted file and configure FAISS to load it, after which code runs with backend-service privileges.

CVSS severity8.8
High
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unsafe deserialization in Langflow Desktop 1.6.0 through 1.8.2 allows remote authenticated users to execute arbitrary code. The FAISS Vector Store loads an uploaded Python Pickle file with dangerous deserialization enabled by default and without restricting untrusted objects. Exploitation requires an authenticated user to upload the crafted file and configure FAISS to load it, after which code runs with backend-service privileges.

The record

CVE
CVE-2026-3357
Published
Apr 8, 2026
Updated
Apr 8, 2026
Vendor
OpenBMC Project
Product
Langflow Desktop
Classifications
CWE-502, T1059.006
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.6.0 <=1.8.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OpenBMC Project · Langflow Desktopversion=1.6.0 <=1.8.2

Published CVSS scores

8.8IBM CorporationCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1059.006Python

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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