CVE-2026-8476: critical vulnerability in IBM Langflow OSS
Disk Cache Deserialization Remote Code Execution Vulnerability
Published · Updated
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28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.9epss 1.0%
IBM Langflow OSS 1.0.0 through 1.10.0 contain a critical remote code execution vulnerability in the disk-based caching mechanism. The AsyncDiskCache class uses Python's unsafe pickle.loads() function to deserialize cached objects from disk without validation, integrity verification, or authentication, enabling arbitrary code execution when malicious pickle payloads are processed. Attackers who can influence cached data through file system access, malicious workflow inputs, custom components, or API manipulation can achieve complete system compromise with the privileges of the Langflow server process.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Affected products
IBM · Langflow OSSRelated CVEs — IBM Langflow OSS
In the same product, most dangerous first.
CVE-2026-9198CRITICALUnauthenticated Remote Code Execution via Auto-Login Bypass and Code ValidationEPSS 28.7%KEVCVE-2026-93674CRITICALLangflow OSS is affected by multiple vulnerabilitiesEPSS 15.3%CVE-2026-9103CRITICALUnauthenticated Superuser Token Issuance via Auto-Login EndpointEPSS 3.2%CVE-2026-10134CRITICALUnauthenticated Server-Side RCE via PythonCodeStructuredTool in Public FlowsEPSS 2.3%CVE-2026-93680CRITICALLangflow OSS is affected by multiple vulnerabilitiesEPSS 2.2%CVE-2026-19295CRITICALLangflow is affected by multiple remote code execution vulnerabilities due to insufficient code-execution policy enforcementEPSS 1.6%