Deserialization in Apple macOS

CVE-2026-8476

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.

Vulnerability class: Insecure Deserialization

EPSS: 0.009 (57.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-8476?
CVE-2026-8476 is a critical-severity vulnerability in Apple macOS, classified under Deserialization of Untrusted Data. CVSS score: 9.9/10. Published 2026-07-17.
How severe is CVE-2026-8476?
Critical severity. CVSS v3 base score is 9.9 out of 10.