CVE-2026-8476: CWE-502 Deserialization of Untrusted Data in IBM Langflow OSS
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.
AI Analysis
Technical Summary
CVE-2026-8476 is a critical vulnerability in IBM Langflow OSS (versions 1.0.0 through 1.10.0) involving unsafe deserialization of untrusted data. The AsyncDiskCache class deserializes cached objects from disk using Python's pickle.loads() function without any validation, integrity checks, or authentication. This flaw enables remote code execution if an attacker can manipulate cached data via file system access, malicious workflow inputs, custom components, or API manipulation. Successful exploitation results in complete system compromise with the privileges of the Langflow server process.
Potential Impact
The vulnerability allows attackers to execute arbitrary code remotely with the privileges of the Langflow server process. This can lead to full system compromise, including confidentiality, integrity, and availability impacts as indicated by the CVSS score of 9.9 (critical).
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary mitigation has been published. Until a patch is available, restrict access to the file system and inputs that influence cached data to trusted users only, and monitor for suspicious activity related to cache manipulation.
CVE-2026-8476: CWE-502 Deserialization of Untrusted Data in IBM Langflow OSS
Description
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 v3.1
Score 9.9critical
Affected software
cpe:2.3:a:ibm:langflow_oss:1.0.0:*:*:*:*:*:*:*cpe:2.3:a:ibm:langflow_oss:1.10.0:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-8476 is a critical vulnerability in IBM Langflow OSS (versions 1.0.0 through 1.10.0) involving unsafe deserialization of untrusted data. The AsyncDiskCache class deserializes cached objects from disk using Python's pickle.loads() function without any validation, integrity checks, or authentication. This flaw enables remote code execution if an attacker can manipulate cached data via file system access, malicious workflow inputs, custom components, or API manipulation. Successful exploitation results in complete system compromise with the privileges of the Langflow server process.
Potential Impact
The vulnerability allows attackers to execute arbitrary code remotely with the privileges of the Langflow server process. This can lead to full system compromise, including confidentiality, integrity, and availability impacts as indicated by the CVSS score of 9.9 (critical).
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary mitigation has been published. Until a patch is available, restrict access to the file system and inputs that influence cached data to trusted users only, and monitor for suspicious activity related to cache manipulation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-05-13T13:17:17.664Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a5b5eb32d1edb114c7fb4d4
Added to database: 07/18/2026, 11:08:35 UTC
Last enriched: 07/18/2026, 11:56:11 UTC
Last updated: 07/18/2026, 13:34:59 UTC
Views: 4
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