CVE-2026-31222: Snorkel Snorkel Trainer.load Uses An Unsafe Vulnerability

HIGH
Advisory Identifier: GHSA-78cp-f66x-qmh5
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CVSS 8.8
CWE-502
Published
Advisory Summary

CVE-2026-31222 is a HIGH (CVSS 8.8) snorkel trainer.load uses an unsafe vulnerability (CWE-502: Deserialization of Untrusted Data) affecting Snorkel libraries in the PyPI ecosystem. The issue involves snorkel trainer.load uses an unsafe torch.load. Remediation is available in the latest vendor maintenance releases.

CVE-2026-31222 at a Glance

CVE Identifier CVE-2026-31222
GHSA Identifier GHSA-78cp-f66x-qmh5
Severity HIGH
CVSS v3.1 Base Score 8.8
CWE Classification CWE-502: Deserialization of Untrusted Data
Affected Product Snorkel
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 8.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-31222

To remediate this vulnerability, upgrade all affected Snorkel dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

snorkel fixed: Latest secure release 
pip install snorkel>=Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show snorkel

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2026-31222, inspect your installed packages using pip:

pip show snorkel

Analyze the terminal output to locate any version of Snorkel in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The pip show snorkel command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-502: Deserialization of Untrusted Data, where the product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid. In Snorkel, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

The snorkel library thru v0.10.0 contains an insecure deserialization vulnerability (CWE-502) in the Trainer.load() method of the Trainer class. The method loads model checkpoint files using torch.load() without enabling the security-restrictive weights_only=True parameter. This default behavior allows the deserialization of arbitrary Python objects via the Pickle module. A remote attacker can exploit this by providing a maliciously crafted model file, leading to arbitrary code execution on the victim's system when the file is loaded via the vulnerable method.

CVE-2026-31222 Affected Snorkel Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
snorkel
pypi/snorkel
PyPI
≤ 0.10.0

References

NVD — CVE-2026-31222 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-31222
Snorkel Source Repository REPOSITORY
https://github.com/snorkel-team/snorkel
www.notion.so/cve-2026-31222-35d1... WEB
https://www.notion.so/CVE-2026-31222-35d1e139318881db8398e0732af8df6d

Frequently Asked Questions

What is CVE-2026-31222?
CVE-2026-31222 is a security vulnerability in Snorkel involving Snorkel Trainer.load uses an unsafe torch.load under CWE-502: Deserialization of Untrusted Data.
Which Snorkel versions are affected?
Affected versions include releases prior to current release patches across affected packages: snorkel.
What version fixes CVE-2026-31222?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is snorkel affected?
Yes, snorkel is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2026-31222?
CVE-2026-31222 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-31222?
CVE-2026-31222 is classified under CWE-502: Deserialization of Untrusted Data (The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.).
How can I check PyPI dependencies for CVE-2026-31222?
Run the dependency tree command: 'pip show snorkel'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-78cp-f66x-qmh5",
  "modified" : "2026-05-18T20:25:45Z",
  "published" : "2026-05-12T18:30:38Z",
  "aliases" : [ "CVE-2026-31222" ],
  "summary" : "Snorkel Trainer.load uses an unsafe torch.load",
  "details" : "The snorkel library thru v0.10.0 contains an insecure deserialization vulnerability (CWE-502) in the Trainer.load() method of the Trainer class. The method loads model checkpoint files using torch.load() without enabling the security-restrictive weights_only=True parameter. This default behavior allows the deserialization of arbitrary Python objects via the Pickle module. A remote attacker can exploit this by providing a maliciously crafted model file, leading to arbitrary code execution on the victim's system when the file is loaded via the vulnerable method.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "snorkel"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.10.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-31222"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/snorkel-team/snorkel"
  }, {
    "type" : "WEB",
    "url" : "https://www.notion.so/CVE-2026-31222-35d1e139318881db8398e0732af8df6d"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-502" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-05-18T20:25:44Z",
    "nvd_published_at" : "2026-05-12T16:16:14Z"
  }
}