CVE-2026-8476 Disk Cache Deserialization Remote Code Execution Vulnerability
Attackers can achieve remote code execution in IBM Langflow OSS by exploiting unsafe pickle deserialization in the disk cache mechanism.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-8476?
CVE-2026-8476 is a critical unsafe deserialization vulnerability in Langflow Langflow, published on 17 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-502
Which versions are affected by CVE-2026-8476?
It affects 1 product.
Products include Langflow Langflow.
How do I fix CVE-2026-8476?
No fix has been published for CVE-2026-8476 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-8476 being exploited?
There is no known exploitation of CVE-2026-8476 in the wild and no public exploit code.
Other vulnerabilities in Langflow Langflow
Sources
Also known as GHSA-r5mm-2qch-fmmr.