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IBM CVE-2026-3357

HIGH
Deserialization of Untrusted Data (CWE-502)
2026-04-08 ibm
Deserialization RCE IBM
8.8
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
8.8 HIGH
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
Analysis Generated
Apr 08, 2026 - 01:00 vuln.today
Patch released
Apr 08, 2026 - 01:00 nvd
Patch available
CVE Published
Apr 08, 2026 - 00:19 nvd
HIGH 8.8

DescriptionCVE.org

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.

AnalysisAI

Remote code execution in IBM Langflow Desktop versions 1.6.0 through 1.8.2 allows authenticated attackers to execute arbitrary code via unsafe deserialization in the FAISS component. The vulnerability stems from an insecure default configuration that permits deserialization of untrusted data. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Authenticate to Langflow Desktop
Exploit
Supply malicious serialized object to FAISS component
Execution
Trigger unsafe deserialization
Impact
Execute arbitrary code with application privileges
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Vulnerability AssessmentAI

Exploitation Authenticated user access to IBM Langflow Desktop 1.6.0-1.8.2 with FAISS component enabled (default configuration). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment This vulnerability presents significant real-world risk despite requiring authentication (PR:L). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker with authenticated access to an IBM Langflow Desktop instance (versions 1.6.0-1.8.2) crafts a malicious serialized payload targeting the FAISS component. By submitting this payload through the application's workflow interface or API endpoint that processes FAISS data, the attacker triggers deserialization of the malicious object. …
Remediation Organizations running IBM Langflow Desktop should immediately upgrade to a patched version beyond 1.8.2 as specified in the IBM security advisory. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: Inventory all systems running IBM Langflow Desktop versions 1.6.0-1.8.2 and restrict network access to affected instances. …

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CVE-2026-3357 vulnerability details – vuln.today
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