id: PYSEC-2026-1254
published: "2026-07-07T14:34:40.749118Z"
modified: "2026-07-07T17:23:55.206026Z"
aliases:
- CVE-2024-45857
- GHSA-8cm9-rrgc-4pcj
summary: Cleanlab Deserialization of Untrusted Data vulnerability
details: Deserialization of untrusted data can occur in versions 2.4.0 or newer of the Cleanlab project, enabling a maliciously crafted datalab.pkl file to run arbitrary code on an end user’s system when the data directory is loaded.
affected:
- package:
    name: cleanlab
    ecosystem: PyPI
    purl: pkg:pypi/cleanlab
  ranges:
  - type: ECOSYSTEM
    events:
    - introduced: 2.4.0
    - last_affected: 2.6.6
  versions:
  - 2.4.0
  - 2.5.0
  - 2.6.0
  - 2.6.1
  - 2.6.2
  - 2.6.3
  - 2.6.4
  - 2.6.5
  - 2.6.6
references:
- type: ADVISORY
  url: https://nvd.nist.gov/vuln/detail/CVE-2024-45857
- type: PACKAGE
  url: https://github.com/cleanlab/cleanlab
- type: WEB
  url: "https://github.com/cleanlab/cleanlab/blob/v2.6.6/cleanlab/datalab/internal/serialize.py#L102-L138"
- type: WEB
  url: https://hiddenlayer.com/sai-security-advisory/2024-09-cleanlab
- type: PACKAGE
  url: https://pypi.org/project/cleanlab
- type: ADVISORY
  url: https://github.com/advisories/GHSA-8cm9-rrgc-4pcj
severity:
- type: CVSS_V3
  score: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- type: CVSS_V4
  score: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N