CVE-2026-31223

The snorkel library thru v0.10.0 contains a critical insecure deserialization vulnerability (CWE-502) in the BaseLabeler.load() method of the BaseLabeler class. The method loads serialized labeler models using the unsafe pickle.load() function on user-supplied file paths without any validation or security controls. Python's pickle module is inherently dangerous for deserializing untrusted data, as it can execute arbitrary code during the deserialization process. A remote attacker can exploit this by providing a maliciously crafted pickle file, leading to arbitrary code execution on the victim's system when the file is loaded via the vulnerable method.

CVSS 3.1

8.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS

0.4% chance of exploitation in the next 30 days; higher than 33% of CVEs (scores of 2026-10-25)

CWE

CWE-502

Published

2026-05-12

Modified

2026-10-19

Record from

the NVD, synced 2026-10-21

Affected

• snorkel:snorkel

Packages (OSV)

References

• https://github.com/snorkel-team/snorkel
• https://www.notion.so/CVE-2026-31223-35d1e1393188811ab1d0e4a8a2e67992

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